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摘要： 笔记-python tutorial-9.classes 1. Classes 1.1. scopes and namespaces namespace: A namespace is a mapping from names to objects. 典型的命名空间有：built-in names; 阅读全文

摘要： 笔记-python-tutorial-8.errors and exceptions 1. errors and exceptions 1.1. syntax errors >>> while True print('Hello world') File "<stdin>", line 1 whil 阅读全文