我是 Python 新手，面临以下问题。
当我尝试使用命令安装“请求”模块时PIP install request，我收到错误：
RuntimeError: maximum recursion depth exceeded
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in
C:\users\sandeep_kumar39\appdata\local\temp\pip-build-gzzphx\setupfiles\
Python 版本是 2.7.12。
我已经使用命令升级了分发包pip install --upgrade distribute.
并使用命令也升级了 pip 版本pip install --upgrade pip
错误的完整输出：
C:\Python27\Scripts>pip install request
Collecting request
Using cached request-0.0.12.tar.gz
Collecting get (from request)
Using cached get-0.0.20.tar.gz
Collecting post (from request)
Using cached post-0.0.12.tar.gz
Collecting setupfiles (from request)
Using cached setupfiles-0.0.16.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\users\sandeep_kumar39\appdata\local\temp\pip-build-3gsgdg\setupfiles\setup.py", line 4, in <module>
from setupfiles import setup
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 18, in <module>
import setupfiles # nopep8
File "setupfiles.py", line 11, in <module>
dirname = os.path.abspath(os.path.dirname(__file__))
File "c:\python27\lib\ntpath.py", line 215, in dirname
return split(p)[0]
File "c:\python27\lib\ntpath.py", line 180, in split
d, p = splitdrive(p)
RuntimeError: maximum recursion depth exceeded
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\sandeep_kumar39\appdata\local\temp\pip-build-3gsgdg\setupfiles\
