mac下安装pycurl解决办法

  src/pycurl.h:185:5: warning: "libcurl was compiled with SSL support, but configure could not determine which "      "library was used; thus no SSL crypto locking callbacks will be set, which may "      "cause random crashes on SSL requests" [-W#warnings]
    #   warning 
        ^
    1 warning generated.
    cc -bundle -undefined dynamic_lookup -arch x86_64 -arch i386 -Wl,-F. build/temp.macosx-10.13-intel-2.7/src/docstrings.o build/temp.macosx-10.13-intel-2.7/src/easy.o build/temp.macosx-10.13-intel-2.7/src/module.o build/temp.macosx-10.13-intel-2.7/src/multi.o build/temp.macosx-10.13-intel-2.7/src/oscompat.o build/temp.macosx-10.13-intel-2.7/src/pythoncompat.o build/temp.macosx-10.13-intel-2.7/src/share.o build/temp.macosx-10.13-intel-2.7/src/stringcompat.o build/temp.macosx-10.13-intel-2.7/src/threadsupport.o -lcurl -o build/lib.macosx-10.13-intel-2.7/pycurl.so
    running install_lib
    copying build/lib.macosx-10.13-intel-2.7/pycurl.so -> /Library/Python/2.7/site-packages
    copying build/lib.macosx-10.13-intel-2.7/curl/__init__.py -> /Library/Python/2.7/site-packages/curl
    byte-compiling /Library/Python/2.7/site-packages/curl/__init__.py to __init__.pyc
    running install_data
    creating /System/Library/Frameworks/Python.framework/Versions/2.7/share
    error: could not create '/System/Library/Frameworks/Python.framework/Versions/2.7/share': Operation not permitted
    
    ----------------------------------------
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/private/tmp/pip-build-7AHn_4/pycurl/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('rn', 'n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-SqelGU-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/tmp/pip-build-7AHn_4/pycur

sudo pip install pycurl -i https://pypi.tuna.tsinghua.edu.cn/simple --user