python3.6数据类型之int类型,,python3.6的


python3.6的数据类型之int类型:

python每个版本的各种数据类型的属性不太一样,针对所使用的具体的版本,最好用dir()查看一下该版本下的各种数据类型的属性有哪些。

int类型:

Jupyter QtConsole 4.2.1
Python 3.6.0 |Anaconda 4.3.1 (64-bit)| (default, Dec 23 2016, 11:57:41) [MSC v.1900 64 bit (AMD64)]
Type "copyright", "credits" or "license" for more information.

IPython 5.1.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython‘s features.
%quickref -> Quick reference.
help -> Python‘s own help system.
object? -> Details about ‘object‘, use ‘object??‘ for extra details.

a=9dir(a)Out[2]: [‘__abs__‘,     #a.__abs__()求a的绝对值 ‘__add__‘,      #a.__add__(2)   a+2 ‘__and__‘,       #与C语言中的按位与一样,a.__and__(30)  Out[10]: 8  先转化为二进制,再按比特位做与运算得到的结果
‘__bool__‘,      #a.__bool__()  零为false,非零为True ‘__ceil__‘,       #貌似没什么意义,a.__ceil__()  大于或等于该整数的最小的整数是它自身 ‘__class__‘,      #a.__class__()  是0,对于float类型的数为0.0‘__delattr__‘,       ‘__dir__‘, ‘__divmod__‘, ‘__doc__‘, ‘__eq__‘, ‘__float__‘, ‘__floor__‘, ‘__floordiv__‘, ‘__format__‘, ‘__ge__‘, ‘__getattribute__‘, ‘__getnewargs__‘, ‘__gt__‘, ‘__hash__‘, ‘__index__‘, ‘__init__‘, ‘__init_subclass__‘, ‘__int__‘, ‘__invert__‘, ‘__le__‘, ‘__lshift__‘, ‘__lt__‘, ‘__mod__‘, ‘__mul__‘, ‘__ne__‘, ‘__neg__‘, ‘__new__‘, ‘__or__‘, ‘__pos__‘, ‘__pow__‘, ‘__radd__‘, ‘__rand__‘, ‘__rdivmod__‘, ‘__reduce__‘, ‘__reduce_ex__‘, ‘__repr__‘, ‘__rfloordiv__‘, ‘__rlshift__‘, ‘__rmod__‘, ‘__rmul__‘, ‘__ror__‘, ‘__round__‘, ‘__rpow__‘, ‘__rrshift__‘, ‘__rshift__‘, ‘__rsub__‘, ‘__rtruediv__‘, ‘__rxor__‘, ‘__setattr__‘, ‘__sizeof__‘,##a=11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111随着整数a的位数的变化,a.__sizeof__()的大小在变化 ‘__str__‘, ‘__sub__‘,         ##a.__sub__(d)  即为 a-d ‘__subclasshook__‘, ‘__truediv__‘, ‘__trunc__‘, ‘__xor__‘, ‘bit_length‘,     #转化为二进制后的位数a.bit_length() ‘conjugate‘,     ##求该数的共轭复数  c=4+3j    c.conjugate()    (4-3j) ‘denominator‘,     ###a.denominator返回1 a的分母是1    注意不用圆括号 ‘from_bytes‘,      ‘imag‘,         ##a.imag 是0,float类型的返回0.0 ‘numerator‘,    ##a.numerator返回其自身的值9 ‘real‘,      ##a.real返回9 ‘to_bytes‘]    ###a.to_bytes(10,"little") 返回:b‘\t\x00\x00\x00\x00\x00\x00\x00\x00\x00‘不知道是什么意思       a.to_bytes(3,"big")   



d=["a","b","c","d"]

for k,v in enumerate(d,1):
print(k,v)
1 a
2 b
3 c
4 d

十进制转化为2进制、8进制、16进制

a=123

bin(a)
Out[130]: ‘0b1111011‘

hex(a)
Out[131]: ‘0x7b‘

oct(a)
Out[132]: ‘0o173‘


二进制、8进制、16进制字符串转化为10进制整数

a=123

b=bin(a)

type(b)
Out[144]: str

int(b,2)
Out[145]: 123

bin(a)
Out[146]: ‘0b1111011‘

a1=int(b,2)

type(a1)
Out[148]: int

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python3.6数据类型之int类型

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