英文文档:
class type(object)
class type(name, bases, dict)
With one argument, return the type of an object. The return value is a type object and generally the same object as returned by object.__class__.
The isinstance() built-in function is recommende
英文文档:
setattr(object, name, value)
This is the counterpart of getattr(). The arguments are an object, a string and an arbitrary value. The string may name an existing attribute or a new attribute. The function assigns the value to the attribute, prov
1.命令介绍
最近学习并使用了一个python的内置函数dir,首先help一下:
复制代码 代码如下:
>>> help(dir)
Help on built-in function dir in module __builtin__:
dir()
dir([object]) -> list of strings
Return an alphabetized list of names comprising (some of) the attribu
如下所示:
1.for循环和range内置函数配合使用
range函数生成一个从零开始的列表,
range(4)表示list:0123
range(1,11,2)表示从1开始到11-1为止步长为2的list:13579
即range(i)表示从0开始到i-1的列表,range(m,n)表示从m开始到n-1的列表,range(m,n,t)表示从m开始步长为t到n-1的列表
”’
print('第一次循环输出:')
for i in range(4):
print(i)
print('第二次
使用Python内置函数:bin()、oct()、int()、hex()可实现进制转换。
先看Python官方文档中对这几个内置函数的描述:
bin(x)
Convert an integer number to a binary string. The result is a valid Python expression. If x is not a Python int object, it has to define an __index__() method that returns