您可以在RaspberryPi上使用此库: https://pypi.python.org/pypi/readchar

You can use this library on a RaspberryPi: https://pypi.python.org/pypi/readchar

import readchar


inputStr = ""

while len(inputStr) != 8:
    inputStr += str(readchar.readchar())

# Quote: "Save it in variable"

variable = inputStr

# Clean
inputStr = ""

或者，要缩短所有时间:

Or, to shorten everything:

import readchar

variable = ""
while len(variable) != 8:
    variable += str(readchar.readchar())