Not able to install requests on cygwin

Not able to install requests on cygwin

I know this question has been asked already. But nothing seems to work for
me. When I tried the following command
pip install requests
I am getting the following error
Traceback (most recent call last):
File "/usr/bin/pip", line 9, in <module>
load_entry_point('pip==1.4.1', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 343, in
load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2307, in
load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2013, in
load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File
"/usr/lib/python2.7/site-packages/pip-1.4.1-py2.7.egg/pip/__init__.py",
line 10, in <module>
from pip.util import get_installed_distributions, get_prog
File "/usr/lib/python2.7/site-packages/pip-1.4.1-py2.7.egg/pip/util.py",
line 8, in <module>
import zipfile
File "/usr/lib/python2.7/zipfile.py", line 6, in <module>
import io
File "/usr/lib/python2.7/io.py", line 60, in <module>
import _io
ImportError: No module named _io