Write to CSV on first empty line

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How do you append to a file? 8 answers

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Try this instead (note the 'a' for append):

with open('C:/Users/Family3/Downloads/weather.csv', 'a', newline='') as csvfile:
    writer = csv.writer(csvfile, delimiter=',',
                            quotechar='|', quoting=csv.QUOTE_MINIMAL)
    writer.writerow(listsof)

The 'a' opens the file for appending and does not erase the already existing file with the same name.

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It is because, whenever you open your csv file, you never take into account that you might already have data in your file. When you load your csvfile into your program, you should append your new data to the file instead of just writing to it.

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