我尝试使用sqlalchemy安装pip3 install sqlalchemy，但我没有安装clang，因此它警告“＃34;加速未启用＆＃34;”。如何在OS X Yosemite上获取clang，然后如何重新安装sqlalchemy？
command '/usr/bin/clang' failed with exit status 1
WARNING: The C extension could not be compiled, speedups are not enabled.
Failure information, if any, is above.
Retrying the build without the C extension now.
WARNING: The C extension could not be compiled, speedups are not enabled.
Plain-Python build succeeded.
答案 0 :(得分：3)
要获得铿锵声，您需要从App Store安装XCode。
之后，您可以使用pip install --upgrade --force-reinstall SQLAlchemy