摘要：
Dictionaries have a method called items that returns a list of tuples, where each tuple is a key-value pair. As you should expect from a dictionary, t... 阅读全文
摘要：
zip is a built-in function that takes two or more sequence and ‘zips’ them into a list of tuples, where each tuple contains one element from each sequ... 阅读全文
摘要：
Strictly speaking, a function can only return one value, but if the value is a tuple, the effect is the same as returning multiple values. For example... 阅读全文
摘要：
It is often useful to swap the values of two variables. With conventional assignments, you have to use a temporary variable. This solution is cumberso... 阅读全文