ERROR: Command "python setup.py egg_info" python-nss

[root@localhost ~]# pip install python-nss

DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Looking in indexes: http://pypi.douban.com/simple
Collecting python-nss
  Downloading http://pypi.doubanio.com/packages/6b/29/629098e34951c358b1f04f13a70b3590eb0cf2df817d945bd05c4169d71b/python-nss-1.0.1.tar.bz2 (222kB)
     |████████████████████████████████| 225kB 31kB/s 
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-JGnrT5/python-nss/setup.py", line 409, in <module>
        sys.exit(main(sys.argv))
      File "/tmp/pip-install-JGnrT5/python-nss/setup.py", line 333, in main
        nss_include_dir  = find_include_dir(['nss3', 'nss'],   ['nss.h',  'pk11pub.h'], include_roots=include_roots)
      File "/tmp/pip-install-JGnrT5/python-nss/setup.py", line 94, in find_include_dir
        raise ValueError("unable to locate include directory containing header files %s" % include_files)

    ValueError: unable to locate include directory containing header files ['nss.h', 'pk11pub.h']

ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-JGnrT5/python-nss/

查看錯誤日誌缺乏頭文件

進入python-nss官網，寫着To build python-nss you the C language header files and libraries for both NSPR and NSS will need to be installed. This is system and distribution specific, as such we cannot give you explicit instructions. On Linux typically these packages are called:

• nss-devel
• nspr-devel

yum install nss-devel -y

yum install nspr-devel -y