目录
什么是bytes (比特类型) 字符串转bytes的函数–encode bytes转字符串的函数–decode
什么是比特类型
二进制的数据流—bytes 一种特殊的字符串 字符串前+b标记
In [4]: bt = b my name is insane
In [5]: type( bt)
out[5]: bytes
dir(param) 会返回某个数据类型支持的所有函数,比如dir(1)会返回数字类型的所有函数
# coding:utf-8
a = hello insane
print(a, type(a))
b= bhello insane
print(b, type(b))
print(b.capitalize())
# print(b.replace(insane, loafer)) # 会报错
print(b.replace(binsane, bloafer))
print(b[0]) # 会将字符转换为二进制类型
print(b[:3])
print(b.find(bi))
print(dir(b)) # dir 打印出某个数据类型支持的所有函数
# c = bhello 小明 # 会报错,byte只支持ASCII
# print(c)
hello insane <class str>
bhello insane <class bytes>
bHello insane
bhello loafer
104
bhel
6
[__add__, __class__, __contains__, __delattr__, __dir__, __doc__, __eq__, __format__, __ge__, __getattribute__, __getitem__, __getnewargs__, __gt__, __hash__, __init__, __init_subclass__, __iter__, __le__, __len__, __lt__, __mod__, __mul__, __ne__, __new__, __reduce__, __reduce_ex__, __repr__, __rmod__, __rmul__, __setattr__, __sizeof__, __str__, __subclasshook__, capitalize, center, count, decode, endswith, expandtabs, find, fromhex, hex, index, isalnum, isalpha, isascii, isdigit, islower, isspace, istitle, isupper, join, ljust, lower, lstrip, maketrans, partition, replace, rfind, rindex, rjust, rpartition, rsplit, rstrip, split, splitlines, startswith, strip, swapcase, title, translate, upper, zfill]
Process finished with exit code 0
字符串转bytes的函数-encode功能
字符串转bytes的函数—encode用法
用法∶string.encode(encoding=utf-8,errors= strict) 参数: encoding: 转换成的编码格式,如ascii , gbk,默认utf-8 errors: 出错时的处理方法,默认strict,直接抛错误,也可以选择ignore忽略错误 返回值: 返回一个比特( bytes )类型
In [11]: str_data = my name is insane
In [12]: byte_data = str_data.encode( utf-8 )
In [13]: byte_data
out[13]: bmy name is insane
bytes转字符串的函数–decode功能
bytes转字符串的函数–decode用法
用法: `bytes.decode(encoding=‘utf-8’, errors=‘strict’) 参数: ·encoding·: 转换成的编码格式,如ascii , gbk,默认utf-8 ·errors·:出错时的处理方法,默认strict,直接抛错误,也可以选择·ignore·忽略错误 返回值: 返回一个字符串类型
In [15]: byte_data = bpython is a good code
In [16]: str_data = byte_data.decode( utf-8 )
In [17]: str_data
Out[17]: python is a good code
实战
c = hello 小明
d = c.encode(utf-8)
print(d, type(d))
print(d.decode(utf-8))
bhello xe5xb0x8fxe6x98x8e <class bytes>
hello 小明
Process finished with exit code 0