Python3“如果”没有捕捉它正在检查的内容

时间:2016-06-07 15:22:30

标签: python typeerror nonetype pyautogui

我已经回顾了其他问题,例如(Python 'if x is None' not catching NoneType),但我没有发现这些信息可用于我的方案。

    import pyautogui

##########################
#This is a looping routine to search for the current image and return its coordinates 
##########################

def finder(passedImage, workSpace): #start the finder func
    print (passedImage) #print the image to be found
    currentImage = pyautogui.locateOnScreen(passedImage,region=(workSpace),  grayscale=True) #search for the image on the screen
    if currentImage == None: # if that initial search goes "none" ...
        print ("Looking") #Let us know we are looking
        finder(passedImage,workSpace) #go and do the function again
    print(currentImage) #print out the coordinates
    currentImageX, currentImageY = pyautogui.center(currentImage) #get the X and Y coord
    pyautogui.click(currentImageX, currentImageY) #use the X and Y coords for where to click
    print(currentImageX, currentImageY) #print the X and Y coords

这个想法很简单。只是找到图像的坐标,然后使用pyautogui库点击它(模块?对我来说是新术语)

除了“if currentImage == None:”位之外,这一切都有效。

有时候当currentImage为None时会捕获,然后适当地重新运行该函数以获取它,但有时则不会。我似乎无法找到任何押韵或背后的原因,有时候工作,其他时间没有。

关于如何检查“无”然后回应“无”的任何建议都会很棒:)

抛出的示例错误如下:

Traceback (most recent call last):
File "fsr_main_001.py", line 57, in <module>
newItem()
File "fsr_main_001.py", line 14, in newItem
finder.finder(passedImage,workSpace)
File "/home/tvorac/python/formAutomation/finder.py", line 14, in finder
currentImageX, currentImageY = pyautogui.center(currentImage) #get the X and Y coord
File "/usr/local/lib/python3.5/dist-packages/pyscreeze/__init__.py", line 398, in center
return (coords[0] + int(coords[2] / 2), coords[1] + int(coords[3] / 2))
TypeError: 'NoneType' object is not subscriptable

1 个答案:

答案 0 :(得分:1)

我认为发生的事情是当你说你重新运行这个功能时,你会递归地这样做。新呼叫return后,finder没有if currentImage == None: # if that initial search goes "none" ... print ("Looking") #Let us know we are looking finder(passedImage,workSpace) #go and do the function again print(currentImage) #print out the coordinates

finder()

一旦currentImage调用完成了它的操作,控制将返回到Nonepyautogui.center的函数实例,并继续执行打印,currentImage = None while currentImage is None: currentImage = pyautogui.locateOnScreen(passedImage,region=(workSpace), grayscale=True) #search for the image on the screen 等等。

鉴于这可能会导致一些非常深刻的递归,它可能不是找到图像的最佳方法。相反,某种循环是最好的。

for

(或类似的东西,增加了超时,最大重试次数等)