CentOS7 安装 Python3.8后 pip 安装报错

[root@localhost Python-3.8.0]# pip install bs4
Collecting bs4
  Using cached https://files.pythonhosted.org/packages/10/ed/7e8b97591f6f456174139ec089c769f89a94a1a4025fe967691de971f314/bs4-0.0.1.tar.gz
    ERROR: Command errored out with exit status 1:
     command: /usr/local/python3.8/bin/python3.8 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-alhbm0sp/bs4/setup.py'"'"'; __file__='"'"'/tmp/pip-install-alhbm0sp/bs4/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-alhbm0sp/bs4/pip-egg-info
         cwd: /tmp/pip-install-alhbm0sp/bs4/
    Complete output (11 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/usr/local/python3.8/lib/python3.8/site-packages/setuptools/__init__.py", line 20, in <module>
        from setuptools.dist import Distribution, Feature
      File "/usr/local/python3.8/lib/python3.8/site-packages/setuptools/dist.py", line 36, in <module>
        from setuptools import windows_support
      File "/usr/local/python3.8/lib/python3.8/site-packages/setuptools/windows_support.py", line 2, in <module>
        import ctypes
      File "/usr/local/python3.8/lib/python3.8/ctypes/__init__.py", line 7, in <module>
        from _ctypes import Union, Structure, Array
    ModuleNotFoundError: No module named '_ctypes'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

yum install libffi-devel -y

make install

[root@localhost Python-3.8.0]# python3
Python 3.8.0 (default, Dec  4 2019, 06:08:18)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys, setuptools, tokenize
>>>