Bruno Desthuilliers schrieb:
DRY/SPOT violation. Should be written as :

 prefix = 'http://'
 if url.startswith(prefix):
     url = url[len(prefix):]

That was exactly my point. This formulation is a bit better, but it still violates DRY, because you need to type "prefix" two times. It is exactly this idiom that I see so often and that I wanted to simplify. Your suggestions work, but I somehow feel such a simple task should have a simpler formulation in Python, i.e. something like

url = url.lstripstr(('http://', 'https://'))

instead of

for prefix in ('http://', 'https://'):
    if url.startswith(prefix):
        url = url[len(prefix):]
        break

-- Christoph
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