Created
May 2, 2015 06:58
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python default parameters
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| """ 在python里，默认参数值都是由函数进行引用的，所以前三个和最后一个函数调用使用的都是同一个默认的参数值""" | |
| def foo(item, items=[], added=True): | |
| if added: | |
| items.append(item) | |
| print items | |
| foo(1) | |
| foo(2) | |
| foo(3, added=False) | |
| foo(4, []) | |
| foo(5) | |
| """ | |
| [1] | |
| [1, 2] | |
| [1, 2] | |
| [4] | |
| [1, 2, 5] | |
| """ |
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