如果有root权限，可以运行：
easy_install argparse
如果没有root权限，As a simple solution copy argparse.py from https://code.google.com/p/argparse/source/browse/argparse.py to your project folder.
REF:
https://pypi.python.org/pypi/argparse
https://code.google.com/p/argparse/source/browse/argparse.py
http://stackoverflow.com/questions/21359400/python-2-6-importerror-no-module-named-argparse
As of Python >= 2.7 and >= 3.2, the argparse module is maintained within the Python standard library. For users who still need to support Python < 2.7 or < 3.2, it is also provided as a separate package, which tries to stay compatible with the module in the standard library, but also supports older Python versions.
argparse is licensed under the Python license, for details see LICENSE.txt.
argparse should work on Python >= 2.3, it was tested on:
Try one of these:
python setup.py install
easy_install argparse
pip install argparse
putting argparse.py in some directory listed in sys.path should also work
ImportError: No module named argparse
原文：http://www.cnblogs.com/emanlee/p/4577249.html