write function parameter inside file - Python

Question

I have a function which prints messages. then I want to save this messages into a file. But when I use .write(function parameter) it only write last message inside my file

writing_in_log = True def print_and_log(message): if write_in_log is True: logFile = open("log", "w+") logFile.write(message) logFile.close()

Thank you I found out that problem was that I opened file in writing mode. I had to open in appending mode and it works fine by now — Sandro Mirijanashvili, Dec 22 '17 at 12:58
@VasilisG. no, not *full code*. Create a [mcve] that demonstrates the problem. — Toby Speight, Dec 22 '17 at 12:58

score 1 · Answer 1 · answered Dec 22 '17 at 12:57

1

I suppose you are not using the 'a' parameter when opening the file:

with open('file.txt', 'a') as file:
    file.write('function parameter')

answered Dec 22 '17 at 12:57

py_dude

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score 1 · Answer 2 · answered Dec 22 '17 at 12:57

You probably open the file for each writing with open(yourfile, 'w') which will erase any content from the file before you write to it. If you want to append to your file, use open(yourfile, 'a').

In case this is not the error we need more information about what you are doing, i.e. the relevant parts of the code.

write function parameter inside file - Python

2 Answers2