python 列表list初始化

python 列表list初始化

1. 基本方法

   $ pythonPython 3.5.2 (default, Sep 14 2017, 22:51:06) [GCC 5.4.0 20160609] on linuxType "help", "copyright", "credits" or "license" for more information.>>> n = [1, 2, 3, 4]>>> print (n)[1, 2, 3, 4]>>> 

2. 连续数字初始化

   >>> list1 = [n for n in range(1,6)]>>> print list1 File "<stdin>", line 1   print list1 #python3 特性输出要()             ^SyntaxError: Missing parentheses in call to 'print'>>> print (list1)[1, 2, 3, 4, 5]>>> 

3. 相同的值初始化

   >>> #第一种方法>>> list2 = ['a' for n in range(4)]>>> print(list2)['a', 'a', 'a', 'a']>>> #第二种方法:字符和数字>>> list3 = ['b'] * 4>>> print(list3)['b', 'b', 'b', 'b']>>> list4 = [3] * 4>>> print (list4)[3, 3, 3, 3]>>> 

4. 二位数组初始化

   $ pythonPython 3.5.2 (default, Sep 14 2017, 22:51:06) [GCC 5.4.0 20160609] on linuxType "help", "copyright", "credits" or "license" for more information.>>> #初始一个5×4的数组>>> multilist = [[1 for col in range(5)] for row in range(4)]>>> print (multilist)[[1, 1, 1, 1, 1], [1, 1, 1, 1, 1], [1, 1, 1, 1, 1], [1, 1, 1, 1, 1]]>>> 

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