Python Tutorial

Python is a widely used high level, interpreted and interactive programming language. It was first developed in 1991 by Guido Van Rossum and designed with the philosophy of code readability which enables programmers to express ideas and logic in fewer lin… Read more

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Python: default argument blunders

A few minutes ago a friend sent me the following code, and told me its misbehaving: def foo(l=[]): l.append("hello!") print(l) foo() foo() Instead of printing ["hello"] twice, it printed ["hello", "hello"]. Any ideas why? what's going on? I'll... (more…)

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