From 029239c701359e84cadb8c093ebd0ccc26d4f9df Mon Sep 17 00:00:00 2001
From: Justus Kuhlmann <justus@kuhl-mann.de>
Date: Thu, 4 Dec 2025 16:04:14 +0100
Subject: [PATCH 1/4] add docstrings for input files

---
 corrlib/input/implementations.py |   2 +-
 corrlib/input/openQCD.py         | 128 +++++++++++++++++++++++++++++++
 2 files changed, 129 insertions(+), 1 deletion(-)

diff --git a/corrlib/input/implementations.py b/corrlib/input/implementations.py
index 2a14d3e..9cb9e84 100644
--- a/corrlib/input/implementations.py
+++ b/corrlib/input/implementations.py
@@ -1,2 +1,2 @@
-
+# List of supported input implementations
 codes = ['sfcf', 'openQCD']
diff --git a/corrlib/input/openQCD.py b/corrlib/input/openQCD.py
index e0caba6..da92645 100644
--- a/corrlib/input/openQCD.py
+++ b/corrlib/input/openQCD.py
@@ -6,6 +6,24 @@ from typing import Any, Optional
 
 
 def read_ms1_param(path: str, project: str, file_in_project: str) -> dict[str, Any]:
+    """
+    Read the parameters for ms1 measurements from a parameter file in the project.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    project: str
+        The project from which to read the parameter file.
+    file_in_project: str
+        The path to the parameter file within the project.
+
+    Returns
+    -------
+    param: dict[str, Any]
+        The parameters read from the file.
+    """
+
     file = os.path.join(path, "projects", project, file_in_project)
     ds = os.path.join(path, "projects", project)
     dl.get(file, dataset=ds)
@@ -52,6 +70,24 @@ def read_ms1_param(path: str, project: str, file_in_project: str) -> dict[str, A
 
 
 def read_ms3_param(path: str, project: str, file_in_project: str) -> dict[str, Any]:
+    """
+    Read the parameters for ms3 measurements from a parameter file in the project.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    project: str
+        The project from which to read the parameter file.
+    file_in_project: str
+        The path to the parameter file within the project.
+
+    Returns
+    -------
+    param: dict[str, Any]
+        The parameters read from the file.
+    """
+
     file = os.path.join(path, "projects", project, file_in_project)
     ds = os.path.join(path, "projects", project)
     dl.get(file, dataset=ds)
@@ -68,6 +104,36 @@ def read_ms3_param(path: str, project: str, file_in_project: str) -> dict[str, A
 
 
 def read_rwms(path: str, project: str, dir_in_project: str, param: dict[str, Any], prefix: str, postfix: str="ms1", version: str='2.0', names: Optional[list[str]]=None, files: Optional[list[str]]=None) -> dict[str, Any]:
+    """
+    Read reweighting factor measurements from the project.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    project: str
+        The project from which to read the measurements.
+    dir_in_project: str
+        The directory within the project where the measurements are located.
+    param: dict[str, Any]
+        The parameters for the measurements.
+    prefix: str
+        The prefix of the measurement files.
+    postfix: str
+        The postfix of the measurement files.
+    version: str
+        The version of the openQCD used.
+    names: list[str]
+        Specific names for the replica of the ensemble the measurement file belongs to.
+    files: list[str]
+        Specific files to read.
+
+    Returns
+    -------
+    rw_dict: dict[str, dict[str, Any]]
+        The reweighting factor measurements read from the files.
+    """
+
     dataset = os.path.join(path, "projects", project)
     directory = os.path.join(dataset, dir_in_project)
     if files is None:
@@ -95,6 +161,37 @@ def read_rwms(path: str, project: str, dir_in_project: str, param: dict[str, Any
 
 
 def extract_t0(path: str, project: str, dir_in_project: str, param: dict[str, Any], prefix: str, dtr_read: int, xmin: int, spatial_extent: int, fit_range: int = 5, postfix: str="", names: Optional[list[str]]=None, files: Optional[list[str]]=None) -> dict[str, Any]:
+    """
+    Extract t0 measurements from the project.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    project: str
+        The project from which to read the measurements.
+    dir_in_project: str
+        The directory within the project where the measurements are located.
+    param: dict[str, Any]
+        The parameters for the measurements.
+    prefix: str
+        The prefix of the measurement files.
+    dtr_read: int
+        The dtr_read parameter for the extraction.
+    xmin: int
+        The xmin parameter for the extraction.
+    spatial_extent: int
+        The spatial_extent parameter for the extraction.
+    fit_range: int
+        The fit_range parameter for the extraction.
+    postfix: str
+        The postfix of the measurement files.
+    names: list[str]
+        Specific names for the replica of the ensemble the measurement file belongs to.
+    files: list[str]
+        Specific files to read.
+    """
+
     dataset = os.path.join(path, "projects", project)
     directory = os.path.join(dataset, dir_in_project)
     if files is None:
@@ -133,6 +230,37 @@ def extract_t0(path: str, project: str, dir_in_project: str, param: dict[str, An
 
 
 def extract_t1(path: str, project: str, dir_in_project: str, param: dict[str, Any], prefix: str, dtr_read: int, xmin: int, spatial_extent: int, fit_range: int = 5, postfix: str = "", names: Optional[list[str]]=None, files: Optional[list[str]]=None) -> dict[str, Any]:
+    """
+    Extract t1 measurements from the project.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    project: str
+        The project from which to read the measurements.
+    dir_in_project: str
+        The directory within the project where the measurements are located.
+    param: dict[str, Any]
+        The parameters for the measurements.
+    prefix: str
+        The prefix of the measurement files.
+    dtr_read: int
+        The dtr_read parameter for the extraction.
+    xmin: int
+        The xmin parameter for the extraction.
+    spatial_extent: int
+        The spatial_extent parameter for the extraction.
+    fit_range: int
+        The fit_range parameter for the extraction.
+    postfix: str
+        The postfix of the measurement files.
+    names: list[str]
+        Specific names for the replica of the ensemble the measurement file belongs to.
+    files: list[str]
+        Specific files to read.
+    """
+
     directory = os.path.join(path, "projects", project, dir_in_project)
     if files is None:
         files = []

From 3cd7896ae1808d9a5442a7db2808bf784fb3d1f2 Mon Sep 17 00:00:00 2001
From: Justus Kuhlmann <justus@kuhl-mann.de>
Date: Thu, 12 Feb 2026 16:20:11 +0100
Subject: [PATCH 2/4] comment get_specs

---
 corrlib/input/sfcf.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/corrlib/input/sfcf.py b/corrlib/input/sfcf.py
index ed5a45a..6a75b72 100644
--- a/corrlib/input/sfcf.py
+++ b/corrlib/input/sfcf.py
@@ -229,6 +229,24 @@ def _map_params(params: dict[str, Any], spec_list: list[str]) -> dict[str, Any]:
 
 
 def get_specs(key: str, parameters: dict[str, Any], sep: str = '/') -> str:
+    """
+    Get sepcification from the parameter file for a specific key in the read measurements
+
+    Parameters
+    ----------
+    key: str
+        The key for whioch the parameters are to be looked up.
+    parameters: dict[str, Any]
+        The dictionary with the parameters from the parameter file.
+    sep: str
+        Separator string for the key. (default="/")
+
+    Return
+    ------
+    s: str
+        json string holding the parameters.
+    """
+
     key_parts = key.split(sep)
     if corr_types[key_parts[0]] == 'bi':
         param = _map_params(parameters, key_parts[1:-1])

From 54006f46f5fb8069bcd84a87607bca4abf967c5b Mon Sep 17 00:00:00 2001
From: Justus Kuhlmann <justus@kuhl-mann.de>
Date: Thu, 12 Feb 2026 16:24:40 +0100
Subject: [PATCH 3/4] comment retruns of extract t0 and t1

---
 corrlib/input/openQCD.py | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/corrlib/input/openQCD.py b/corrlib/input/openQCD.py
index da92645..71ebec6 100644
--- a/corrlib/input/openQCD.py
+++ b/corrlib/input/openQCD.py
@@ -190,6 +190,11 @@ def extract_t0(path: str, project: str, dir_in_project: str, param: dict[str, An
         Specific names for the replica of the ensemble the measurement file belongs to.
     files: list[str]
         Specific files to read.
+
+    Returns
+    -------
+    t0_dict: dict
+        Dictionary of t0 values in the pycorrlib style, with the parameters at hand.
     """
 
     dataset = os.path.join(path, "projects", project)
@@ -259,6 +264,11 @@ def extract_t1(path: str, project: str, dir_in_project: str, param: dict[str, An
         Specific names for the replica of the ensemble the measurement file belongs to.
     files: list[str]
         Specific files to read.
+
+    Returns
+    -------
+    t1_dict: dict
+        Dictionary of t1 values in the pycorrlib style, with the parameters at hand.
     """
 
     directory = os.path.join(path, "projects", project, dir_in_project)
@@ -289,7 +299,7 @@ def extract_t1(path: str, project: str, dir_in_project: str, param: dict[str, An
     for k in ["integrator", "eps", "ntot", "dnms"]:
         par_list.append(str(param[k]))
     pars = "/".join(par_list)
-    t0_dict: dict[str, Any] = {}
-    t0_dict[param["type"]] = {}
-    t0_dict[param["type"]][pars] = t0
-    return t0_dict
+    t1_dict: dict[str, Any] = {}
+    t1_dict[param["type"]] = {}
+    t1_dict[param["type"]][pars] = t0
+    return t1_dict

From 4631769e81bcb58e6d667aee8e81b875129933a6 Mon Sep 17 00:00:00 2001
From: Justus Kuhlmann <justus@kuhl-mann.de>
Date: Thu, 12 Feb 2026 18:39:04 +0100
Subject: [PATCH 4/4] finish a first pitch of docstrings

---
 corrlib/cli.py            |   3 +
 corrlib/find.py           | 256 ++++++++++++++++++++++++++++----------
 corrlib/initialization.py |  35 +++++-
 corrlib/main.py           |  52 +++++---
 corrlib/meas_io.py        |  72 ++++++++++-
 corrlib/toml.py           |  76 ++++++++++-
 corrlib/tools.py          |  96 +++++++++++++-
 7 files changed, 502 insertions(+), 88 deletions(-)

diff --git a/corrlib/cli.py b/corrlib/cli.py
index 3f4eb8f..414fcc4 100644
--- a/corrlib/cli.py
+++ b/corrlib/cli.py
@@ -134,6 +134,9 @@ def reimporter(
         ),
     ident: str = typer.Argument()
     ) -> None:
+    """
+    Reimport the toml file identfied by the ident string.
+    """
     uuid = ident.split("::")[0]
     if len(ident.split("::")) > 1:
         toml_file = os.path.join(path, "toml_imports", ident.split("::")[1])
diff --git a/corrlib/find.py b/corrlib/find.py
index 901c09c..21063ec 100644
--- a/corrlib/find.py
+++ b/corrlib/find.py
@@ -8,11 +8,23 @@ from .tools import k2m, get_db_file
 from .tracker import get
 from typing import Any, Optional
 
-# this will implement the search functionality
-
 
 def _project_lookup_by_alias(db: str, alias: str) -> str:
-    # this will lookup the project name based on the alias
+    """
+    Lookup a projects UUID by its (human-readable) alias.
+
+    Parameters
+    ----------
+    db: str
+        The database to look up the project.
+    alias: str
+        The alias to look up.
+
+    Returns
+    -------
+    uuid: str
+        The UUID of the project with the given alias.
+    """
     conn = sqlite3.connect(db)
     c = conn.cursor()
     c.execute(f"SELECT * FROM 'projects' WHERE alias = '{alias}'")
@@ -26,6 +38,21 @@ def _project_lookup_by_alias(db: str, alias: str) -> str:
 
 
 def _project_lookup_by_id(db: str, uuid: str) -> list[tuple[str, str]]:
+    """
+    Return the project information available in the database by UUID.
+
+    Parameters
+    ----------
+    db: str
+        The database to look up the project.
+    uuid: str
+        The uuid of the project in question.
+
+    Returns
+    -------
+    results: list
+        The row of the project in the database.
+    """
     conn = sqlite3.connect(db)
     c = conn.cursor()
     c.execute(f"SELECT * FROM 'projects' WHERE id = '{uuid}'")
@@ -36,6 +63,38 @@ def _project_lookup_by_id(db: str, uuid: str) -> list[tuple[str, str]]:
 
 def _db_lookup(db: str, ensemble: str, correlator_name: str, code: str, project: Optional[str]=None,  parameters: Optional[str]=None,
                created_before: Optional[str]=None, created_after: Optional[Any]=None, updated_before: Optional[Any]=None, updated_after: Optional[Any]=None) -> pd.DataFrame:
+    """
+    Look up a correlator record in the database by the data given to the method.
+
+    Parameters
+    ----------
+    db: str
+        The database to look up the record.
+    ensemble: str
+        The ensemble the record is associated with.
+    correlator_name: str
+        The name of the correlator in question.
+    code: str
+        The name of the code which was used to calculate the correlator.
+    project: str, optional
+        The UUID of the project the correlator was calculated in.
+    parameters: str, optional
+        A dictionary holding the exact parameters for the measurement that are held in the database.
+    created_before: str, optional
+        Timestamp string before which the meaurement has been created.
+    created_after: str, optional
+        Timestamp string after which the meaurement has been created.
+    updated_before: str, optional
+        Timestamp string before which the meaurement has been updated.
+    updated_after: str, optional
+        Timestamp string after which the meaurement has been updated.
+
+    Returns
+    -------
+    results: pd.DataFrame
+        A pandas DataFrame holding the information received form the DB query.
+    """
+
     project_str = project
 
     search_expr = f"SELECT * FROM 'backlogs' WHERE name = '{correlator_name}' AND ensemble = '{ensemble}'"
@@ -60,85 +119,112 @@ def _db_lookup(db: str, ensemble: str, correlator_name: str, code: str, project:
 
 
 def sfcf_filter(results: pd.DataFrame, **kwargs: Any) -> pd.DataFrame:
+    """
+    Filter method for the Database entries holding SFCF calculations.
+
+    Parameters
+    ----------
+    results: pd.DataFrame
+        The unfiltered pandas DataFrame holding the entries from the database.
+
+    offset: list[float], optional
+    quark_kappas: list[float]
+    quarks_masses: list[float]
+    qk1: float, optional
+        Mass parameter $\kappa_1$ of the first quark.
+    qk2: float, optional
+        Mass parameter $\kappa_2$ of the first quark.
+    qm1: float, optional
+        Bare quak mass $m_1$ of the first quark.
+    qm2: float, optional
+        Bare quak mass $m_1$ of the first quark.
+    quarks_thetas: list[list[float]], optional
+    wf1: optional
+    wf2: optional
+
+    Results
+    -------
+    results: pd.DataFrame
+        The filtered DataFrame, only holding the records that fit to the parameters given.
+    """
     drops = []
     for ind in range(len(results)):
         result = results.iloc[ind]
-        if result['code'] == 'sfcf':
-            param = json.loads(result['parameters'])
-            if 'offset' in kwargs:
-                if kwargs.get('offset') != param['offset']:
+        param = json.loads(result['parameters'])
+        if 'offset' in kwargs:
+            if kwargs.get('offset') != param['offset']:
+                drops.append(ind)
+                continue
+        if 'quark_kappas' in kwargs:
+            kappas = kwargs['quark_kappas']
+            if (not np.isclose(kappas[0], param['quarks'][0]['mass']) or not np.isclose(kappas[1], param['quarks'][1]['mass'])):
+                drops.append(ind)
+                continue
+        if 'quark_masses' in kwargs:
+            masses = kwargs['quark_masses']
+            if (not np.isclose(masses[0], k2m(param['quarks'][0]['mass'])) or not np.isclose(masses[1], k2m(param['quarks'][1]['mass']))):
+                drops.append(ind)
+                continue
+        if 'qk1' in kwargs:
+            quark_kappa1 = kwargs['qk1']
+            if not isinstance(quark_kappa1, list):
+                if (not np.isclose(quark_kappa1, param['quarks'][0]['mass'])):
                     drops.append(ind)
                     continue
-            if 'quark_kappas' in kwargs:
-                kappas = kwargs['quark_kappas']
-                if (not np.isclose(kappas[0], param['quarks'][0]['mass']) or not np.isclose(kappas[1], param['quarks'][1]['mass'])):
-                    drops.append(ind)
-                    continue
-            if 'quark_masses' in kwargs:
-                masses = kwargs['quark_masses']
-                if (not np.isclose(masses[0], k2m(param['quarks'][0]['mass'])) or not np.isclose(masses[1], k2m(param['quarks'][1]['mass']))):
-                    drops.append(ind)
-                    continue
-            if 'qk1' in kwargs:
-                quark_kappa1 = kwargs['qk1']
-                if not isinstance(quark_kappa1, list):
-                    if (not np.isclose(quark_kappa1, param['quarks'][0]['mass'])):
+            else:
+                if len(quark_kappa1) == 2:
+                    if (quark_kappa1[0] > param['quarks'][0]['mass']) or (quark_kappa1[1] < param['quarks'][0]['mass']):
                         drops.append(ind)
                         continue
-                else:
-                    if len(quark_kappa1) == 2:
-                        if (quark_kappa1[0] > param['quarks'][0]['mass']) or (quark_kappa1[1] < param['quarks'][0]['mass']):
-                            drops.append(ind)
-                            continue
-            if 'qk2' in kwargs:
-                quark_kappa2 = kwargs['qk2']
-                if not isinstance(quark_kappa2, list):
-                    if (not np.isclose(quark_kappa2, param['quarks'][1]['mass'])):
-                        drops.append(ind)
-                        continue
-                else:
-                    if len(quark_kappa2) == 2:
-                        if (quark_kappa2[0] > param['quarks'][1]['mass']) or (quark_kappa2[1] < param['quarks'][1]['mass']):
-                            drops.append(ind)
-                            continue
-            if 'qm1' in kwargs:
-                quark_mass1 = kwargs['qm1']
-                if not isinstance(quark_mass1, list):
-                    if (not np.isclose(quark_mass1, k2m(param['quarks'][0]['mass']))):
-                        drops.append(ind)
-                        continue
-                else:
-                    if len(quark_mass1) == 2:
-                        if (quark_mass1[0] > k2m(param['quarks'][0]['mass'])) or (quark_mass1[1] < k2m(param['quarks'][0]['mass'])):
-                            drops.append(ind)
-                            continue
-            if 'qm2' in kwargs:
-                quark_mass2 = kwargs['qm2']
-                if not isinstance(quark_mass2, list):
-                    if (not np.isclose(quark_mass2, k2m(param['quarks'][1]['mass']))):
-                        drops.append(ind)
-                        continue
-                else:
-                    if len(quark_mass2) == 2:
-                        if (quark_mass2[0] > k2m(param['quarks'][1]['mass'])) or (quark_mass2[1] < k2m(param['quarks'][1]['mass'])):
-                            drops.append(ind)
-                            continue
-            if 'quark_thetas' in kwargs:
-                quark_thetas = kwargs['quark_thetas']
-                if (quark_thetas[0] != param['quarks'][0]['thetas'] and quark_thetas[1] != param['quarks'][1]['thetas']) or (quark_thetas[0] != param['quarks'][1]['thetas'] and quark_thetas[1] != param['quarks'][0]['thetas']):
+        if 'qk2' in kwargs:
+            quark_kappa2 = kwargs['qk2']
+            if not isinstance(quark_kappa2, list):
+                if (not np.isclose(quark_kappa2, param['quarks'][1]['mass'])):
                     drops.append(ind)
                     continue
-            # careful, this is not save, when multiple contributions are present!
-            if 'wf1' in kwargs:
-                wf1 = kwargs['wf1']
-                if not (np.isclose(wf1[0][0], param['wf1'][0][0], 1e-8) and np.isclose(wf1[0][1][0], param['wf1'][0][1][0], 1e-8) and np.isclose(wf1[0][1][1], param['wf1'][0][1][1], 1e-8)):
+            else:
+                if len(quark_kappa2) == 2:
+                    if (quark_kappa2[0] > param['quarks'][1]['mass']) or (quark_kappa2[1] < param['quarks'][1]['mass']):
+                        drops.append(ind)
+                        continue
+        if 'qm1' in kwargs:
+            quark_mass1 = kwargs['qm1']
+            if not isinstance(quark_mass1, list):
+                if (not np.isclose(quark_mass1, k2m(param['quarks'][0]['mass']))):
                     drops.append(ind)
                     continue
-            if 'wf2' in kwargs:
-                wf2 = kwargs['wf2']
-                if not (np.isclose(wf2[0][0], param['wf2'][0][0], 1e-8) and np.isclose(wf2[0][1][0], param['wf2'][0][1][0], 1e-8) and np.isclose(wf2[0][1][1], param['wf2'][0][1][1], 1e-8)):
+            else:
+                if len(quark_mass1) == 2:
+                    if (quark_mass1[0] > k2m(param['quarks'][0]['mass'])) or (quark_mass1[1] < k2m(param['quarks'][0]['mass'])):
+                        drops.append(ind)
+                        continue
+        if 'qm2' in kwargs:
+            quark_mass2 = kwargs['qm2']
+            if not isinstance(quark_mass2, list):
+                if (not np.isclose(quark_mass2, k2m(param['quarks'][1]['mass']))):
                     drops.append(ind)
                     continue
+            else:
+                if len(quark_mass2) == 2:
+                    if (quark_mass2[0] > k2m(param['quarks'][1]['mass'])) or (quark_mass2[1] < k2m(param['quarks'][1]['mass'])):
+                        drops.append(ind)
+                        continue
+        if 'quark_thetas' in kwargs:
+            quark_thetas = kwargs['quark_thetas']
+            if (quark_thetas[0] != param['quarks'][0]['thetas'] and quark_thetas[1] != param['quarks'][1]['thetas']) or (quark_thetas[0] != param['quarks'][1]['thetas'] and quark_thetas[1] != param['quarks'][0]['thetas']):
+                drops.append(ind)
+                continue
+        # careful, this is not save, when multiple contributions are present!
+        if 'wf1' in kwargs:
+            wf1 = kwargs['wf1']
+            if not (np.isclose(wf1[0][0], param['wf1'][0][0], 1e-8) and np.isclose(wf1[0][1][0], param['wf1'][0][1][0], 1e-8) and np.isclose(wf1[0][1][1], param['wf1'][0][1][1], 1e-8)):
+                drops.append(ind)
+                continue
+        if 'wf2' in kwargs:
+            wf2 = kwargs['wf2']
+            if not (np.isclose(wf2[0][0], param['wf2'][0][0], 1e-8) and np.isclose(wf2[0][1][0], param['wf2'][0][1][0], 1e-8) and np.isclose(wf2[0][1][1], param['wf2'][0][1][1], 1e-8)):
+                drops.append(ind)
+                continue
     return results.drop(drops)
 
 
@@ -152,17 +238,49 @@ def find_record(path: str, ensemble: str, correlator_name: str, code: str, proje
     results = _db_lookup(db, ensemble, correlator_name,code, project, parameters=parameters, created_before=created_before, created_after=created_after, updated_before=updated_before, updated_after=updated_after)
     if code == "sfcf":
         results = sfcf_filter(results, **kwargs)
+    elif code == "openQCD":
+        pass
+    else:
+        raise Exception
     print("Found " + str(len(results)) + " result" + ("s" if len(results)>1 else ""))
     return results.reset_index()
 
 
 def find_project(path: str, name: str) -> str:
+    """
+    Find a project by it's human readable name.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    name: str
+        The name of the project to look for in the library.
+
+    Returns
+    -------
+    uuid: str
+        The uuid of the project in question.
+    """
     db_file = get_db_file(path)
     get(path, db_file)
     return _project_lookup_by_alias(os.path.join(path, db_file), name)
 
 
 def list_projects(path: str) -> list[tuple[str, str]]:
+    """
+    List all projects known to the library.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+
+    Returns
+    -------
+    results: list[Any]
+        The projects known to the library.
+    """
     db_file = get_db_file(path)
     get(path, db_file)
     conn = sqlite3.connect(os.path.join(path, db_file))
diff --git a/corrlib/initialization.py b/corrlib/initialization.py
index 8aa8287..bb71db6 100644
--- a/corrlib/initialization.py
+++ b/corrlib/initialization.py
@@ -8,6 +8,10 @@ def _create_db(db: str) -> None:
     """
     Create the database file and the table.
 
+    Parameters
+    ----------
+    db: str
+        Path of the database file.
     """
     conn = sqlite3.connect(db)
     c = conn.cursor()
@@ -38,7 +42,21 @@ def _create_db(db: str) -> None:
 
 def _create_config(path: str, tracker: str, cached: bool) -> ConfigParser:
     """
-    Create the config file for backlogger.
+    Create the config file construction for backlogger.
+
+    Parameters
+    ----------
+    path: str
+        The path of the libaray to create.
+    tracker: str
+        Type of the tracker to use for the library (only DataLad is supported at the moment).
+    cached: bool
+        Whether or not the library will create a cache folder for multiple reads when downloaded.
+
+    Returns
+    -------
+    config: ConfigParser
+        Cpnfig parser with the default configuration printed.
 
     """
     config = ConfigParser()
@@ -60,6 +78,13 @@ def _create_config(path: str, tracker: str, cached: bool) -> ConfigParser:
 def _write_config(path: str, config: ConfigParser) -> None:
     """
     Write the config file to disk.
+
+    Parameters
+    ----------
+    path: str
+        The path of the libaray to create.
+    config: ConfigParser
+        The configuration to be used as a ConfigParser, e.g. generated by _create_config.
     """
     with open(os.path.join(path, '.corrlib'), 'w') as configfile:
         config.write(configfile)
@@ -70,6 +95,14 @@ def create(path: str, tracker: str = 'datalad', cached: bool = True) -> None:
     """
     Create folder of backlogs.
 
+    Parameters
+    ----------
+    path: str
+        The path at which the library will be created.
+    tracker: str, optional
+        The tracker to use for the library. The delauft is DataLad, which is also the only one that is supported at the moment.
+    cached: bool, optional
+        Whether or not hte librarby will be cached. By default, it does cache already read entries.
     """
     config = _create_config(path, tracker, cached)
     init(path, tracker)
diff --git a/corrlib/main.py b/corrlib/main.py
index 24d5103..88b99b3 100644
--- a/corrlib/main.py
+++ b/corrlib/main.py
@@ -45,9 +45,25 @@ def create_project(path: str, uuid: str, owner: Union[str, None]=None, tags: Uni
     conn.commit()
     conn.close()
     save(path, message="Added entry for project " + uuid + " to database", files=[db_file])
+    return
 
 
 def update_project_data(path: str, uuid: str, prop: str, value: Union[str, None] = None) -> None:
+    """
+    Update/Edit a project entry in the database.
+    Thin wrapper around sql3 call.
+
+    Parameters
+    ----------
+    path: str
+        The path to the backlogger folder.
+    uuid: str
+        The uuid of the project.
+    prop: str
+        Property of the entry to edit
+    value: str or None
+        Value to se `prop` to.
+    """
     db_file = get_db_file(path)
     get(path, db_file)
     conn = sqlite3.connect(os.path.join(path, db_file))
@@ -88,6 +104,8 @@ def update_aliases(path: str, uuid: str, aliases: list[str]) -> None:
 
 def import_project(path: str, url: str, owner: Union[str, None]=None, tags: Optional[list[str]]=None, aliases: Optional[list[str]]=None, code: Optional[str]=None, isDataset: bool=True) -> str:
     """
+    Import a datalad dataset into the backlogger.
+
     Parameters
     ----------
 
@@ -95,22 +113,19 @@ def import_project(path: str, url: str, owner: Union[str, None]=None, tags: Opti
         The url of the project to import. This can be any url that datalad can handle.
     path: str
         The path to the backlogger folder.
-    aliases: list[str]
-        Custom name of the project, alias of the project.
-    code: str
+    owner: str, optional
+        Person responsible for the maintainance of the project to be impoerted.
+    tags: list[str], optional
+        Custom tags of the imported project.
+    aliases: list[str], optional
+        Custom names of the project, alias of the project.
+    code: str, optional
         Code that was used to create the measurements.
 
-    Import a datalad dataset into the backlogger.
-
-    Parameters
-    ----------
-    path: str
-        The path to the backlogger directory.
-    url: str
-        The url of the project to import. This can be any url that datalad can handle.
-        Also supported are non-datalad datasets, which will be converted to datalad datasets,
-        in order to receive a uuid and have a consistent interface.
-
+    Returns
+    -------
+    uuid: str
+        The unique identifier of the imported project.
     """
     tmp_path = os.path.join(path, 'projects/tmp')
     clone(path, source=url, target=tmp_path)
@@ -144,6 +159,15 @@ def import_project(path: str, url: str, owner: Union[str, None]=None, tags: Opti
 def drop_project_data(path: str, uuid: str, path_in_project: str = "") -> None:
     """
     Drop (parts of) a project to free up diskspace
+
+    Parameters
+    ----------
+    path: str
+        Path of the library.
+    uuid: str
+        The UUID ofthe project rom which data is to be dropped.
+    path_pn_project: str, optional
+        If set, only the given path within the project is dropped.
     """
     drop(path + "/projects/" + uuid + "/" + path_in_project)
     return
diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index a00079e..65a0569 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -27,6 +27,10 @@ def write_measurement(path: str, ensemble: str, measurement: dict[str, dict[str,
         Measurements to be captured in the backlogging system.
     uuid: str
         The uuid of the project.
+    code: str
+        Name of the code that was used for the project.
+    parameter_file: str
+        The parameter file used for the measurement.
     """
     db_file = get_db_file(path)
     db = os.path.join(path, db_file)
@@ -97,6 +101,7 @@ def write_measurement(path: str, ensemble: str, measurement: dict[str, dict[str,
     files.append(os.path.join(path, db_file))
     conn.close()
     save(path, message="Add measurements to database", files=files)
+    return
 
 
 def load_record(path: str, meas_path: str) -> Union[Corr, Obs]:
@@ -128,10 +133,13 @@ def load_records(path: str, meas_paths: list[str], preloaded: dict[str, Any] = {
         Path of the correlator library.
     meas_paths: list[str]
         A list of the paths to the correlator in the backlog system.
+    perloaded: dict[str, Any]
+        The data that is already prelaoded. Of interest if data has alread been loaded in the same script.
 
     Returns
     -------
-    List
+    retruned_data: list
+        The loaded records.
     """
     needed_data: dict[str, list[str]] = {}
     for mpath in meas_paths:
@@ -157,6 +165,20 @@ def load_records(path: str, meas_paths: list[str], preloaded: dict[str, Any] = {
 
 
 def cache_dir(path: str, file: str) -> str:
+    """
+    Returns the directory corresponding to the cache for the given file.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    file: str
+        The file in the library that we want to access the cached data of.
+    Returns
+    -------
+    cache_path: str
+        The path holding the cached data for the given file.
+    """
     cache_path_list = [path]
     cache_path_list.append(".cache")
     cache_path_list.extend(file.split("/")[1:])
@@ -165,11 +187,41 @@ def cache_dir(path: str, file: str) -> str:
 
 
 def cache_path(path: str, file: str, key: str) -> str:
+    """
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    file: str
+        The file in the library that we want to access the cached data of.
+    key: str
+        The key within the archive file.
+
+    Returns
+    -------
+    cache_path: str
+        The path at which the measurement of the given file and key is cached.
+    """
     cache_path = os.path.join(cache_dir(path, file), key)
     return cache_path
 
 
 def preload(path: str, file: str) -> dict[str, Any]:
+    """
+    Read the contents of a file into a json dictionary with the pyerrors.json.load_json_dict method.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    file: str
+        The file within the library to be laoded.
+
+    Returns
+    -------
+    filedict: dict[str, Any]
+        The data read from the file.
+    """
     get(path, file)
     filedict: dict[str, Any] = pj.load_json_dict(os.path.join(path, file))
     print("> read file")
@@ -177,6 +229,16 @@ def preload(path: str, file: str) -> dict[str, Any]:
 
 
 def drop_record(path: str, meas_path: str) -> None:
+    """
+    Drop a record by it's path.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    meas_path: str
+        The measurement path as noted in the database.
+    """
     file_in_archive = meas_path.split("::")[0]
     file = os.path.join(path, file_in_archive)
     db_file = get_db_file(path)
@@ -204,6 +266,14 @@ def drop_record(path: str, meas_path: str) -> None:
 
 
 def drop_cache(path: str) -> None:
+    """
+    Drop the cache directory of the library.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    """
     cache_dir = os.path.join(path, ".cache")
     for f in os.listdir(cache_dir):
         shutil.rmtree(os.path.join(cache_dir, f))
diff --git a/corrlib/toml.py b/corrlib/toml.py
index c1c4d5b..629a499 100644
--- a/corrlib/toml.py
+++ b/corrlib/toml.py
@@ -22,6 +22,18 @@ from typing import Any
 
 
 def replace_string(string: str, name: str, val: str) -> str:
+    """
+    Replace a placeholder {name} with a value in a string.
+
+    Parameters
+    ----------
+    string: str
+        String in which the placeholders are to be replaced.
+    name: str
+        The name of the placeholder.
+    val: str
+        The value the placeholder is to be replaced with.
+    """
     if '{' + name + '}' in string:
         n = string.replace('{' + name + '}', val)
         return n
@@ -30,7 +42,16 @@ def replace_string(string: str, name: str, val: str) -> str:
 
 
 def replace_in_meas(measurements: dict[str, dict[str, Any]], vars: dict[str, str]) -> dict[str, dict[str, Any]]:
-    # replace global variables
+    """
+    Replace placeholders in the defiitions for a measurement.
+
+    Parameters
+    ----------
+    measurements: dict[str, dict[str, Any]]
+        The measurements read from the toml file.
+    vars: dict[str, str]
+        Simple key:value dictionary with the keys to be replaced by the values.
+    """
     for name, value in vars.items():
         for m in measurements.keys():
             for key in measurements[m].keys():
@@ -43,6 +64,16 @@ def replace_in_meas(measurements: dict[str, dict[str, Any]], vars: dict[str, str
 
 
 def fill_cons(measurements: dict[str, dict[str, Any]], constants: dict[str, str]) -> dict[str, dict[str, Any]]:
+    """
+    Fill in defined constants into the measurements of the toml-file.
+
+    Parameters
+    ----------
+    measurements: dict[str, dict[str, Any]]
+        The measurements read from the toml file.
+    constants: dict[str, str]
+        Simple key:value dictionary with the keys to be replaced by the values.
+    """
     for m in measurements.keys():
         for name, val in constants.items():
             if name not in measurements[m].keys():
@@ -51,6 +82,14 @@ def fill_cons(measurements: dict[str, dict[str, Any]], constants: dict[str, str]
 
 
 def check_project_data(d: dict[str, dict[str, str]]) -> None:
+    """
+    Check the data given in the toml import file for the project we want to import.
+
+    Parameters
+    ----------
+    d: dict
+        The dictionary holding the data necessary to import the project.
+    """
     if 'project' not in d.keys() or 'measurements' not in d.keys() or len(list(d.keys())) > 4:
         raise ValueError('There should only be maximally be four keys on the top level, "project" and "measurements" are mandatory, "contants" is optional!')
     project_data = d['project']
@@ -64,6 +103,16 @@ def check_project_data(d: dict[str, dict[str, str]]) -> None:
 
 
 def check_measurement_data(measurements: dict[str, dict[str, str]], code: str) -> None:
+    """
+    Check syntax of the measurements we want to import.
+
+    Parameters
+    ----------
+    measurements: dict[str, dict[str, str]]
+        The dictionary holding the necessary data to import the project.
+    code: str
+        The code used for the project.
+    """
     var_names: list[str] = []
     if code == "sfcf":
         var_names = ["path", "ensemble", "param_file", "version", "prefix", "cfg_seperator", "names"]
@@ -78,8 +127,21 @@ def check_measurement_data(measurements: dict[str, dict[str, str]], code: str) -
 
 
 def import_tomls(path: str, files: list[str], copy_files: bool=True) -> None:
+    """
+    Import multiple toml files.
+
+    Parameters
+    ----------
+    path: str
+        Path to the backlog directory.
+    files: list[str]
+        Path to the description files.
+    copy_files: bool, optional
+        Whether the toml-files will be copied into the library. Default is True.
+    """
     for file in files:
         import_toml(path, file, copy_files)
+    return
 
 
 def import_toml(path: str, file: str, copy_file: bool=True) -> None:
@@ -92,6 +154,8 @@ def import_toml(path: str, file: str, copy_file: bool=True) -> None:
         Path to the backlog directory.
     file: str
         Path to the description file.
+    copy_file: bool, optional
+        Whether the toml-files will be copied into the library. Default is True.
     """
     print("Import project as decribed in " + file)
     with open(file, 'rb') as fp:
@@ -180,6 +244,16 @@ def reimport_project(path: str, uuid: str) -> None:
 
 
 def update_project(path: str, uuid: str) -> None:
+    """
+    Update all entries associated with a given project.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    uuid: str
+        The unique identifier of the project to be updated.
+    """
     dl.update(how='merge', follow='sibling', dataset=os.path.join(path, "projects", uuid))
     # reimport_project(path, uuid)
     return
diff --git a/corrlib/tools.py b/corrlib/tools.py
index 9c39d7c..118b094 100644
--- a/corrlib/tools.py
+++ b/corrlib/tools.py
@@ -3,26 +3,91 @@ from configparser import ConfigParser
 from typing import Any
 
 CONFIG_FILENAME = ".corrlib"
+cached: bool = True
 
 
 def str2list(string: str) -> list[str]:
+    """
+    Convert a comma-separated string to a list.
+
+    Parameters
+    ----------
+    string: str
+        The sting holding a comma-sparated list.
+
+    Returns
+    -------
+    s: list[str]
+        The list of strings that was held bythe comma separated string.
+    """
     return string.split(",")
 
 def list2str(mylist: list[str]) -> str:
+    """
+    Convert a list to a comma-separated string.
+
+    Parameters
+    ----------
+    mylist: list[str]
+        A list of strings to be concatinated.
+
+    Returns
+    -------
+    s: list[str]
+        The sting holding a comma-sparated list.
+    """
     s = ",".join(mylist)
     return s
 
-cached: bool = True
-
 def m2k(m: float) -> float:
+    """
+    Convert to bare quark mas $m$ to inverse mass parameter $kappa$.
+
+    Parameters
+    ----------
+    m: float
+        Bare quark mass.
+
+    Returns
+    -------
+    k: float
+        The corresponing $kappa$.
+    """
     return 1/(2*m+8)
 
 
 def k2m(k: float) -> float:
+    """
+    Convert from the inverse bare quark parameter $kappa$ to the bare quark mass $m$.
+
+    Parameters
+    ----------
+    k: float
+        Inverse bare quark mass parameter $kappa$.
+
+    Returns
+    -------
+    m: float
+        The corresponing bare quark mass.
+    """
     return (1/(2*k))-4
 
 
 def set_config(path: str, section: str, option: str, value: Any) -> None:
+    """
+    Set configuration parameters for the library.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+    section: str
+        The section within the configuration file.
+    option: str
+        The option to be set to value.
+    value: Any
+        The value we set the option to.
+    """
     config_path = os.path.join(path, '.corrlib')
     config = ConfigParser()
     if os.path.exists(config_path):
@@ -36,6 +101,19 @@ def set_config(path: str, section: str, option: str, value: Any) -> None:
 
 
 def get_db_file(path: str) -> str:
+    """
+    Get the database file associated with the library at the given path.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+
+    Returns
+    -------
+    db_file: str
+        The file holding the database.
+    """
     config_path = os.path.join(path, CONFIG_FILENAME)
     config = ConfigParser()
     if os.path.exists(config_path):
@@ -45,6 +123,20 @@ def get_db_file(path: str) -> str:
 
 
 def cache_enabled(path: str) -> bool:
+    """
+    Check, whether the library is cached.
+    Fallback is true.
+
+    Parameters
+    ----------
+    path: str
+        The path of the library.
+
+    Returns
+    -------
+    cached_bool: bool
+        Whether the given library is cached.
+    """
     config_path = os.path.join(path, CONFIG_FILENAME)
     config = ConfigParser()
     if os.path.exists(config_path):