ImportError: pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend
重新安装pycurl
pip uninstall pycurl
export PYCURL_SSL_LIBRARY=nss
easy_install pycurl
ImportError: cannot import name 'DispatcherMiddleware'
要降低版本，2.4.1还是有问题。0.16.1没问题
python -m pip uninstall werkzeug # 卸载
python -m pip install werkzeug==0.16.1 #安装0.16.1版本
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