How to add pandas data to an existing csv file?

Question

I want to know if it is possible to use the pandas to_csv() function to add a dataframe to an existing csv file. The csv file has the same structure as the load

Answer 1

with open(filename, 'a') as f:
    df.to_csv(f, header=f.tell()==0)

• Create file unless exists, otherwise append
• Add header if file is being created, otherwise skip it