Mail Merge from DataFrame into Word Label Template

[PEGylated_User]

I have a DataFrame that looks like this:

Output:
       FormulationNames FormulationLots TimePoints StorageConditions
    0                f1              l1    Initial               NaN
    1                f1              l1        tp1              -20C
    2                f1              l1        tp1                5C
    3                f1              l1        tp1               25C
    4                f1              l1        tp1               30C
    5                f1              l1        tp2              -20C
    6                f1              l1        tp2                5C
    7                f2              l2    Initial               NaN
    8                f2              l2        tp1              -20C
    9                f2              l2        tp1                5C
    10               f2              l2        tp1               25C
    11               f2              l2        tp1               30C
    12               f2              l2        tp2              -20C
    13               f2              l2        tp2                5C

I have a template word document full of labels that contain mergefields. The merge field names are:

Output:
    print(document.get_merge_fields())
    {'TimePoints', 'FormulationNames', 'StorageConditions', 'FormulationLots'}

Every row will be a single label so not all the labels will be the same. Each column in the same row I need on a new line in the label so each label will have 4 lines of text. I have exported the DataFrame to a csv and done the MailMerge manually to ensure that the labels will look right, but I am having trouble finding documentation on how to perform this programatically.

I have tried this code so far:

    import pandas
    from mailmerge import MailMerge
    
    template_doc = "Labels.docx"
    
    data = {'FormulationNames': ['f1','f1','f1','f1','f1','f1','f1', 'f2','f2','f2','f2','f2','f2','f2'],
        'FormulationLots': ['l1','l1','l1','l1','l1','l1','l1','l2','l2','l2','l2','l2','l2','l2'],
        'TimePoints': ['Initial','tp1','tp1','tp1','tp1','tp1','tp1','Initial','tp2','tp2','tp2','tp2','tp2','tp2'],
        'StorageConditions': ['NaN','-20C','5C','25C','30C','-20C','5C','NaN','-20C','5C','25C','30C','-20C','5C']}        
    
    df = pandas.DataFrame(data)
    
    document = MailMerge(template_doc)
    document.merge(df)   
    document.write(f'test.docx')

When running the above code I get an error when trying to merge:

Error:
Exception has occurred: ValueError
The truth value of a DataFrame is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().
  File "C:\Users\02260235\Downloads\Test App\ST.py", line 14, in <module>
    document.merge(df)