4.1. Set 转换为 Dict: 注意:Set 中的元素必须是可哈希的,因此只能转换包含元组的集合。 my_set = {('a', 1), ('b', 2), ('c', 3)}set_to_dict = dict(my_set)print(set_to_dict) 4.2. Set 转换为 List 或 Tuple: 由于Set 是无序的,转换为 List 或 Tuple 时顺
1.set() 语法:set([iterable]) 参数:可迭代对象(可选),a sequence (string, tuple, etc.) or collection (list, set, dictionary, etc.) or an iterator object to be converted into a set 返回值:set集合 作用:去重,因为set集合的本质是无序,不重复的集合。所以转变为set集合的过程就是去重的过程 1...
/, *, key=None, reverse=False) Return a new list containing all items from the iterable in ascending order. A custom key function can be supplied to customize the sort order, and the reverse flag can be set to request the result in descending order. ...
sample_set = {10, 20, 30, 40} my_list = sorted(sample_set) print(my_list) Output [10, 20, 30, 40] 5) Unpack set inside the parenthesis In this method, you have to unpack the set inside the list literal, which is created due to the presence of the single comma(,). This...
words = sorted(list(set(words))) 1. 对这三个方法做一下整理: 1.set() 语法:set([iterable]) 参数:可迭代对象(可选),a sequence (string, tuple, etc.) or collection (list, set, dictionary, etc.) or an iterator object to be converted into a set ...
Help on built-in function sorted in module builtins:sorted(iterable, /, *, key=None, reverse=False) Return a new list containing all items from the iterable in ascending order. A custom key function can be supplied to customize the sort order, and the reverse flag can be set to request...
reverse is a boolean value. If set to True, then the list elements are sorted as if each comparison were reversed.In general, the key and reverse conversion processes are much faster than specifying an equivalent cmp function. This is because cmp is called multiple times for each list ...
print list_after_sorted[i][0],list_after_sorted[i][1] def main(): dict_word = get_list_dict() sort_dict_get_ten(dict_word) if __name__ == '__main__': main() [('hello', 4), ('kitty', 3), ('he', 2), ('good', 1), ('hasd', 1), ('wangleai', 1), ('has...
集合(set) # listnumbers=[3,1,4,1,5,9]sorted_numbers=sorted(numbers)print(sorted_numbers)# 输出: [1, 1, 3, 4, 5, 9] key 函数,用来提取待排序元素的关键字(排序依据) 常见key函数: len(按长度排序) str.lower(忽略大小写排序)
Python排序函数完美体现了Python语言的简洁性,对于List对象,我们可以直接调用sort()函数(这里称为"方法"更合适)来进行排序,而对于其他可迭代对象(如set,dict),我们可以使用更灵活的sorted()函数。 一.List的sort()函数 Python源码builtins.py文件对sort()函数的定义如下 ...