Python安装setuptools遇到的MARKER_EXPR错误

# python setup.py install

Traceback (most recent call last):

  File "setup.py", line 11, in <module>

    import setuptools

  File "/home/zhangsan/setuptools-34.4.1/setuptools/__init__.py", line 12, in <module>

    import setuptools.version

  File "/home/zhangsan/setuptools-34.4.1/setuptools/version.py", line 1, in <module>

    import pkg_resources

  File "/home/zhangsan/setuptools-34.4.1/pkg_resources/__init__.py", line 72, in <module>

    import packaging.requirements

  File "/usr/local/lib/python2.7/site-packages/packaging/requirements.py", line 59, in <module>

    MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")

TypeError: __call__() takes exactly 2 arguments (1 given)

对于这个错误，只需要提示找到requirements.py的59行，将

MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")

改成：

MARKER_EXPR = originalTextFor(MARKER_EXPR)("marker")

即可。