當嘗試使用sudo pip install lxml來安裝lxml 時

會提示

Command "/usr/bin/python -c "import setuptools, tokenize;__file__='/private/tmp/pip-build-Swce2X/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-bXUbas-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/tmp/pip-build-Swce2X/lxml

使用以下網頁的方法

安裝command line tools 即可成功安裝lxml與Scrapy