Python如何在while循环中返回值 [英] Python How to Return value in while loop

问题描述

当将 return 放入 while 循环时，循环将停止如何解决?

When put return in while loop the loop will stop How to fix it?

ser = serial.Serial(
    port='COM5',
    baudrate = 9600,
    timeout=1)
while 1:
    x=str(ser.readline())
    x = re.findall("\d+\.\d+", x)
    x = float(x[0])
    return(x) #loop stopped
    print(x)

你能帮我吗?

推荐答案

简单的把你的

x=str(ser.readline())
x = re.findall("\d+\.\d+", x)
x = float(x[0])
return(x) #loop stopped

把它放到像

def foo(ser):
    x=str(ser.readline())
    x = re.findall("\d+\.\d+", x)
    x = float(x[0])
    return(x)

并将您的 while 循环更改为

and change your while loop to simply be

while 1:
    print(foo(ser))

但是@developius 有一个更好的解决方案，看起来像

However @developius had a better solution which would look something like

while 1:
    x=str(ser.readline())
    x = re.findall("\d+\.\d+", x)
    x = float(x[0])
    print(x)

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