Display all curves if labels are duplicated.

[bfonta]

Issue

Curves associated to duplicated labels are not plotted correctly. This originates from an overwrite done by the datasets[label] = grouped statement. To fix the issue:

Fix

• If the user passes the labels, a simple check on their uniqueness is enough;
• If the user does not pass the labels, a new make_unique_label function ensures new labels become unique. Duplication happens when the name of at least two csv files is identical.

I took this chance to restructure the code with the if __name__ == '__main__': construct.

Validation

Tested with python3 plot.py <scan1> <scan2> ... and python3 plot.py <scan1> <scan2> ... --labels 1 2 ....

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Thanks to @hamani115 for pointing the bug out to me.