安装python3.7出现ModuleNotFoundError: No module named '_ctypes'解决办法

在编译python3.7的时候，make没有报错，但是在编译的时候报 ModuleNotFoundError: No module named ‘_ctypes’ 错误

Traceback (most recent call last):
  File "/home/wfq/soft/Python-3.7.0b3/Lib/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/wfq/soft/Python-3.7.0b3/Lib/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/wfq/soft/Python-3.7.0b3/Lib/ensurepip/__main__.py", line 5, in <module>
    sys.exit(ensurepip._main())
  File "/home/wfq/soft/Python-3.7.0b3/Lib/ensurepip/__init__.py", line 204, in _main
    default_pip=args.default_pip,
  File "/home/wfq/soft/Python-3.7.0b3/Lib/ensurepip/__init__.py", line 117, in _bootstrap
    return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/home/wfq/soft/Python-3.7.0b3/Lib/ensurepip/__init__.py", line 27, in _run_pip
    import pip
  File "/tmp/tmpnfe1bbxk/pip-9.0.3-py2.py3-none-any.whl/pip/__init__.py", line 45, in <module>
  File "/tmp/tmpnfe1bbxk/pip-9.0.3-py2.py3-none-any.whl/pip/vcs/mercurial.py", line 9, in <module>
  File "/tmp/tmpnfe1bbxk/pip-9.0.3-py2.py3-none-any.whl/pip/download.py", line 36, in <module>
  File "/tmp/tmpnfe1bbxk/pip-9.0.3-py2.py3-none-any.whl/pip/utils/glibc.py", line 4, in <module>
  File "/home/wfq/soft/Python-3.7.0b3/Lib/ctypes/__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
make: *** [install] Error 1

解决方法：

yum -y install libffi-devel  tk-devel

安装好以后，重新执行 make install 即可。