Python内置hex函数的详细介绍
英文文档:
hex(x)
Convert an integer number to a lowercase hexadecimal string prefixed with “0x”, for example
If x is not a Python int object, it has to define an index() method that returns an integer.
说明:
1. 函数功能将10进制整数转换成16进制整数。
>>> hex(15)'0xf'>>> hex(16)'0x10'
2. 如果参数x不是整数,则它必须定义一个返回整数的index函数。
# 未定义__index__函数>>> class Student: def __init__(self,name,age): self.name = name self.age = age>>> >>> s = Student('Kim',10)>>> hex(s)Traceback (most recent call last): File "<pyshell>", line 1, in <module> hex(s)TypeError: 'Student' object cannot be interpreted as an integer# 定义__index__函数,但是返回字符串>>> class Student: def __init__(self,name,age): self.name = name self.age = age def __index__(self): return self.name>>> s = Student('Kim',10)>>> hex(s)Traceback (most recent call last): File "<pyshell>", line 1, in <module> hex(s)TypeError: __index__ returned non-int (type str)# 定义__index__函数,并返回整数>>> class Student: def __init__(self,name,age): self.name = name self.age = age def __index__(self): return self.age>>> s = Student('Kim',10)>>> hex(s)'0xa'</module></pyshell></module></pyshell>