How can I get the size of a TemporaryFile in python? [duplicate]

Question

Currently when I write to a temporary:

import tempfile
a = tempfile.TemporaryFile()

a.write(...)

# The only way I know to get the size
a.seek(0)
len(a.read())

Is there a better way?

Answer 1

import tempfile
a = tempfile.TemporaryFile()
a.write('abcd')
a.tell()
# 4

a.tell() gives you the current position in the file. If you are only appending this will be accurate. If you are jumping around the file with seek, then seek to the end of the file first with: a.seek(0, 2) the second parameter "whence"=2 means the position is relative to the end of the file. https://docs.python.org/2/tutorial/inputoutput.html#methods-of-file-objects

Answer 2

You can use os.stat assuming the file has either been closed or all pending writes have been flushed

os.stat(a.name).st_size