Writing a string to the last line in a file, Python

Question

I'm attempting to make a function that writes a string to the last line in a file. However, what I currently have (below) only writes to the first line. So if I call the function more than once, it simply overwrites the first line. I'd like it to instead write the string to a new line; how would I go about this?

Snippet :

def write (self, string) :
    # self.Dir is a txt file
    self.File = file(self.Dir, 'w')
    self.File.write(string)

Eli Bendersky · Accepted Answer · 2011-05-16 11:51:53Z

17

Open the file in append mode ('a' instead of 'w'). Opening in 'w' mode truncates your file (you're now writing into an empty file)

answered May 16, 2011 at 11:51

Eli Bendersky

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1 Comment

Nam Nguyen Over a year ago

And remember to put in a newline character '\n' after the last string.

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