安装rpy2时报如下错：
[root@localhost ~]# pip install rpy2 You are using pip version 7.1.0, however version 9.0.1 is available. You should consider upgrading via the 'pip install --upgrade pip' command. Collecting rpy2 /usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning. InsecurePlatformWarning Using cached rpy2-2.8.5.tar.gz Complete output from command python setup.py egg_info: Traceback (most recent call last): File "<string>", line 20, in <module> File "/tmp/pip-build-ypdM2Y/rpy2/setup.py", line 4, in <module> import argparse, shlex, subprocess ImportError: No module named argparse ---------------------------------------- Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-ypdM2Y/rpy2
解决办法是：
[root@localhost ~]# pip install argparse You are using pip version 7.1.0, however version 9.0.1 is available. You should consider upgrading via the 'pip install --upgrade pip' command. Collecting argparse /usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning. InsecurePlatformWarning Downloading argparse-1.4.0-py2.py3-none-any.whl Installing collected packages: argparse Successfully installed argparse-1.4.0