[英]Passing a command line argument into a Python Script causes error
我有一些來自ADAFRUIT的python示例腳本,它控制伺服,它的工作原理!
我想執行它來通過從命令行調用兩個值來更改ServoMin和ServoMax值。 我遇到的問題是,當我import sys
並設置ServoMin = (sys.argv)
時似乎不喜歡它。 我不知道為什么它不接受int或str。 有任何想法嗎?
這是代碼體:
#!/usr/bin/python
from Adafruit_PWM_Servo_Driver import PWM
import time
import sys
# ===========================================================================
# Example Code
# ===========================================================================
# Initialise the PWM device using the default address
# bmp = PWM(0x40, debug=True)
pwm = PWM(0x50, debug=True)
servoMin = 150 # Min pulse length out of 4096
servoMax = 600 # Max pulse length out of 4096
def setServoPulse(channel, pulse):
pulseLength = 1000000 # 1,000,000 us per second
pulseLength /= 60 # 60 Hz
print "%d us per period" % pulseLength
pulseLength /= 4096 # 12 bits of resolution
print "%d us per bit" % pulseLength
pulse *= 1000
pulse /= pulseLength
pwm.setPWM(channel, 0, pulse)
pwm.setPWMFreq(60) # Set frequency to 60 Hz
while (True):
# Change speed of continuous servo on channel O
pwm.setPWM(0, 0, servoMin)
time.sleep(1)
pwm.setPWM(0, 0, servoMax)
time.sleep(1)
sys.argv
是一個參數列表,您需要訪問參數,然后將它們轉換為Ints。
這應該這樣做:
servoMin = int(sys.argv[1])
servoMax = int(sys.argv[2])
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