Save Pandas df containing long list as csv file

I am trying to save a pandas dataframe as .csv file. Currently my code looks like this:

with open('File.csv', 'a') as f:
        df.to_csv(f, header=False)

The saving works but the problem is that the lists in my dataframe are just compressed to [first,second,…,last] and all the entries in the middle are discarded. If I just look at the original dataframe all entries are there. Is there any way how I can convert the list to a string which contains all the elements (str(df) also discards the middle elements) or how I can save a full numpy array in a cell of a csv table?

Thank you for your help, Viviane

Answer

You can probably convert elements present in the list using join method.

example:

lst =  ['Hello!','I','am', 'Pandas User','.']
strng = ' '.join(lst)
print (strng)

hope this helps to you.