Checking whether a variable is an integer or not [duplicate]

Answer 1

If you want to check with no regard for Python version (2.x vs 3.x), use six (PyPI) and it's integer_types attribute:

import six

if isinstance(obj, six.integer_types):
    print('obj is an integer!')

Within six (a very light-weight single-file module), it's simply doing this:

import sys
PY3 = sys.version_info[0] == 3

if PY3:
    integer_types = int,
else:
    integer_types = (int, long)