Alok Menghrajani

Previously: security engineer at Square, co-author of HackLang, put the 's' in https at Facebook. Maker of CTFs.

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WTF Python

Jul 23, 2013

tags: python | wtf

Python's default parameters don't get deep copied at call time:

def myfun(data=[]):
  data.append(1)
  return data

print myfun(), myfun(), myfun([]), myfun([])

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