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Python Append to existing csv file

Wm Allen Smith
on
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Last Modified: 2020-03-25
How to append to an existing csv file? I have a csv file that is the result of looping through a folder and extracting data from named excel sheets within the folder. The the dataframe is saved as a csv file. Everytime the process runs it overwrites the content in the csv--I want to append to the file with new rows of data from each run, , not overwrite it. Please advise.
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