Why python has limit for count of file handles?

user_834954 0
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I writed simple code for test, how much files may be open in python script:

for i in xrange(2000):
    fp = open('files/file_%d' % i, 'w')
    fp.write(str(i))
    fp.close()

fps = []
for x in xrange(2000):
    h = open('files/file_%d' % x, 'r')
    print h.read()
    fps.append(h)

and I get a exception

IOError: [Errno 24] Too many open files: 'files/file_509'
python
7 Answers

On Windows one can get or set the limit with the built-in ctypes library:

import ctypes
print("Before: {}".format(ctypes.windll.msvcrt._getmaxstdio()))
ctypes.windll.msvcrt._setmaxstdio(2048)
print("After: {}".format(ctypes.windll.msvcrt._getmaxstdio()))
user_11165450
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