python中字元怎麼轉數字呢?不知道的小夥伴來看看小編今天的分享吧!
python中字元串str轉數字:
float(str)
int(str)
拓展資料:
1、數字num轉字元串:
str(num)
代碼如下:
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、數字num轉bytes
需將num轉爲str,再利用codec的encode函數,將str轉爲bytes:encode(str(num))
bytes轉數字
int(bytes)
float(bytes)
代碼如下:
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、字元串轉bytes
方法1
from codec import encode,decode
encode(str)
方法2
bytes(str,'UTF-8')
bytes轉字元串
方法1
from codec import encode,decode
decode(bytes)12
方法2
str(bytes,'UTF-8')1
數字表達字元串
cmd ='x02x73x54x49x20x03x0a'