Replicate sysfs with bus

#!/usr/bin/python3

import time

with open("/sys/bus/i2c/drivers/pca9685-pwm/2-0070/pwm/pwmchip9/pwm-9:0/enable", "w+") as a:
    a.read()
    a.write == "0"
    time.sleep(2)
    a.write == "1"

with open("/sys/bus/i2c/drivers/pca9685-pwm/2-0070/pwm/pwmchip9/pwm-9:0/period", "w+") as b:
    b.read()
    b.write = "10000000"
    # b.close()

with open("/sys/bus/i2c/drivers/pca9685-pwm/2-0070/pwm/pwmchip9/pwm-9:0/duty_cycle", "w+") as c:
    c.read()
    c.write = "1000000"
    # c.close()

for i in range(0, 180, 5):
    angle = int(input("0 to 180: "))
    if angle < 45:
        time.sleep(2)
        a = "1"
        c = "1500000"

    elif angle >= 45:
        time.sleep(2)
        a = "1"
        c = "2000000"

    elif angle <= 180:
        time.sleep(2)
        a = "1"
        b = "10000000"
        c = "2000000"

    elif angle == 135:
        time.sleep(2)
        a = "1"
        c = "1500000"

    else:
        angle == 90
        time.sleep(2)
        a = "1"
        c = "2000000"