python 列表list初始化

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

>>> 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]
>>>

>>> #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]
>>>

$ python
Python 3.5.2 (default, Sep 14 2017, 22:51:06)
[GCC 5.4.0 20160609] on linux
Type "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]]
>>>