I’m trying to create a file with a unique file name for every time my script runs. I am only intending to do this to every week or month. so I chose to use the date for the file name.
f = open('%s.csv', 'wb') %name
is where I’m getting this error.
Traceback (most recent call last): File "C:UsersUserworkspacenew3stjohnsinvoicesBabblevoiceInvoiceswpath.py", line 143, in <module> f = open('%s.csv', 'ab') %name TypeError: unsupported operand type(s) for %: 'file' and 'str'
it works if I use a static filename, is there an issue with the open function, that means you can’t pass a string like this?
name is a string and has values such as :
31/1/2013BVI
Many thanks for any help.
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Answer
You need to put % name
straight after the string:
f = open('%s.csv' % name, 'wb')
The reason your code doesn’t work is because you are trying to %
a file, which isn’t string formatting, and is also invalid.