jacekbj/python.md

## python.md

      
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              python.md
            
          
    From https://jeffknupp.com/blog/2016/03/07/python-with-context-managers/.
Can be used both as context manager and as function decorator.
from contextlib import ContextDecorator

class makeparagraph(ContextDecorator):
    def __enter__(self):
        print('<p>')
        return self

    def __exit__(self, *exc):
        print('</p>')
        return False

@makeparagraph()
def emit_html():
    print('Here is some non-HTML')

emit_html()