Python安裝setuptools遇到的MARKER_EXPR錯誤

# python setup.py install

Traceback (most recent call last):

  File "setup.py", line 11, in

    import setuptools

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

    import setuptools.version

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

    import pkg_resources

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

    import packaging.requirements

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

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

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

對于這個錯誤，隻需要提示找到requirements.py的59行，将

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

改成：

MARKER_EXPR = originalTextFor(MARKER_EXPR)("marker")

即可。

如果在安裝psycopg2遇到錯誤：

Error: pg_config executable not found.

則表示需要安裝包postgresql-devel：

yum install postgresql-devel