python中字符怎么转数字呢？不知道的小伙伴来看看小编今天的分享吧!
python中字符串str转数字
float(str)
int(str)
拓展资料
1、数字num转字符串
str(num)
代码如下
a ='1234'
print('a = ',a)
print(type(a))
b = int(a)
print('b = ',b)
print(type(b))
c = float(a)
print('c = ',c)
print(type(c))
d = str(b)
print('d = ',d)
print(type(d))
f = 1.234
ff = str(f)
print('ff = ',ff)
print(type(ff))
2、数字num转bytes
需将num转为str，再利用codec的encode函数，将str转为bytesencode(str(num))
bytes转数字
int(bytes)
float(bytes)
代码如下
from codecs import encode, decode
b = b'1.234'
print('b = ',b)
print(type(b))
c = float(b)
print('c = ',c)
print(type(c))
d = str(c)
e = encode(d)
print('e = ',e)
print(type(e))
f = decode(e)
print('f = ',f)
print(type(f))
3、字符串转bytes
方法1
from codec import encode,decode
encode(str)
方法2
bytes(str,'UTF-8')
bytes转字符串
方法1
from codec import encode,decode
decode(bytes)12
方法2
str(bytes,'UTF-8')1
数字表达字符串
cmd ='\x02\x73\x54\x49\x20\x03\x0a'
