Merge pull request 'add function to only show a single arg with the find cli' (#16) from fix/cli-find into master

Reviewed-on: https://www.kuhl-mann.de/git/git/jkuhl/corrlib/pulls/16

corrlib/cli.py

@@ -90,6 +90,11 @@ def find(
         "--dataset",
         "-d",
     ),
+    arg: str = typer.Option(
+        str('all'),
+        "--show",
+        "-s",
+    ),
     ensemble: str = typer.Argument(),
     corr: str = typer.Argument(),
     code: str = typer.Argument(),
@@ -98,8 +103,12 @@ def find(
     Find a record in the backlog at hand. Through specifying it's ensemble and the measured correlator.
     """
     results = find_record(path, ensemble, corr, code)
+    if arg == "all":
         print(results)
-
+    else:
+        for i in range(len(results)):
+            print(results[arg].values[i])
+    return
 
 @app.command()
 def importer(