from tempfile import NamedTemporaryFile
from contextlib import contextmanager
import os
@contextmanager
def temporary_file(suffix=''):
"""Yield a writeable temporary filename that is deleted on context exit.
Parameters
----------
suffix : string, optional
The suffix for the file.
Examples
--------
>>> import numpy as np
>>> from skimage import io
>>> with temporary_file('.tif') as tempfile:
... im = np.arange(25, dtype=np.uint8).reshape((5, 5))
... io.imsave(tempfile, im)
... assert np.all(io.imread(tempfile) == im)
"""
with NamedTemporaryFile(suffix=suffix, delete=False) as tempfile_stream:
tempfile = tempfile_stream.name
yield tempfile
os.remove(tempfile)