'While running wiringpi python program motors are not initializing

I am trying to use python wiringpi for self-driving car core code.

import wiringpi as wp
from time import sleep

in1 = 1
in2 = 4
in3 = 5
in4 = 6

def initDC():
    wp.pinMode(in1, 1)
    wp.pinMode(in2, 1)
    wp.pinMode(in3, 1)
    wp.pinMode(in4, 1)
    wp.digitalWrite(in1, 1)
    wp.digitalWrite(in1, 1)
    wp.digitalWrite(in1, 1)
    wp.digitalWrite(in1, 1)
    print("initDC")

def goForward():
    wp.digitalWrite(in1, 1)
    wp.digitalWrite(in1, 0)
    wp.digitalWrite(in1, 1)
    wp.digitalWrite(in1, 0)
    print("goForward")

wp.wiringPiSetup()
initDc()
goForward()
sleep(1)

I installed wiringpi using pip. It installed successfully.

While I am running this code via terminal it is executing printing but motors are not turning on and working?

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'While running wiringpi python program motors are not initializing

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