lxml导入

通常的导入方式

from lxml import etree

python有自带的ElementTree库，但lxml在其基础上新增了特有的功能

如果代码仅使用ElementTree API，不依赖于lxml.etree特有的任何功能，那么还可使用(以下导入链的任何部分)作为回到原始ElementTree的方法

try:

  from lxml import etree

  print("running with lxml.etree")

except ImportError:

  try:

    # Python 2.5

    import xml.etree.cElementTree as etree

    print("running with cElementTree on Python 2.5+")

  except ImportError:

    try:

      # Python 2.5

      import xml.etree.ElementTree as etree

      print("running with ElementTree on Python 2.5+")

    except ImportError:

      try:

        # normal cElementTree install

        import cElementTree as etree

        print("running with cElementTree")

      except ImportError:

        try:

          # normal ElementTree install

          import elementtree.ElementTree as etree

          print("running with ElementTree")

        except ImportError:

          print("Failed to import ElementTree from any known place")

巴特西

lxml导入

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