error in demjson setup command: use_2to3 is invalid.

安装demjson模块出现这个报错

部分源代码

if py_major >= 3:
# Make sure 2to3 gets run
if distmech == 'setuptools':
py3extra['use_2to3'] = True
#py3extra['convert_2to3_doctests'] = ['src/your/module/README.txt']
#py3extra['use_2to3_fixers'] = ['your.fixers']

elif distmech == 'distutils':
    import distutils, distutils.command, distutils.command.build_py, distutils.command.build_scripts
    cmdclass = {
        'build_py':      distutils.command.build_py.build_py_2to3,
        'build_scripts': distutils.command.build_scripts.build_scripts_2to3
        }
    py3extra['cmdclass'] = cmdclass

error in demjson setup command: use_2to3 is invalid.

是不是我的pip版本太高了

谁能帮我解决这个问题

安装demjson最新版本就可以了，此问题已解决