如何解决调用函数时,try / except语句在哪里?
我有我要调用函数的主要Python脚本。我想捕获函数执行期间发生的任何错误,如果有任何错误,我想将error变量设置为true。是否在主脚本中完成了try / except语句,如下所示:
try:
image_convert(filepath,'.jpg','RGB',2500,2500)
except:
error = true
或者是在函数内部完成的:
def image_convert(filepath,imageType,colorMode,height,width):
try:
imwrite(filepath[:-4] + imageType,imread(filepath)[:,:,:3].copy()) # <-- using the imagecodecs library function of imread,make a copy in memory of the TIFF File.
# The :3 on the end of the numpy array is stripping the alpha channel from the TIFF file if it has one so it can be easily converted to a JPEG file.
# Once the copy is made the imwrite function is creating a JPEG file from the TIFF file.
# The [:-4] is stripping off the .tif extension from the file and the + '.jpg' is adding the .jpg extension to the newly created JPEG file.
img = Image.open(filepath[:-4] + imageType) # <-- Using the Image.open function from the Pillow library,we are getting the newly created JPEG file and opening it.
img = img.convert(colorMode) # <-- Using the convert function we are making sure to convert the JPEG file to RGB color mode.
imageResize = img.resize((height,width)) # <-- Using the resize function we are resizing the JPEG to 2500 x 2500
imageResize.save(filepath[:-4] + imageType) # <-- Using the save function,we are saving the newly sized JPEG file over the original JPEG file initially created.
return(imageResize)
except:
error = true
解决方法
第一种方法有效
try:
image_convert(filepath,'.jpg','RGB',2500,2500)
except:
error = true
,
由于从try块内部进行函数调用,因此在执行功能代码期间发生的任何错误/异常也将进入try块的区域内,因此将被重定向到except块。
一个简单的例子如下:
def test():
raise Exception
try:
test()
except:
error = True
print(error)
输出将是:
是
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