What is the output of the following? def f(a, b=[]): b.append(a) return b print(f(1)) print(f(2))

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Python Developer — Medium

What is the output of the following? def f(a, b=[]): b.append(a) return b print(f(1)) print(f(2))

Key points

  • The function f appends the value of a to the list b.
  • The default argument b is shared between function calls.
  • The list b retains its value from the previous function call.

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