What does err do in Python

Question

I dont understand what `ValueError as err' does

Answer 1 · 2019-04-28T03:32:57Z

April 28, 2019 3:32am

ValueError as err says, create a variable called err and pass the error class in that variable. We are dynamically creating a variable on the fly and it can be named anything like any other variable. It's common convention to call it err or even just e. This gives us the ability to catch various errors and handle them gracefully.

Here's it is in code:

try:
    a = 'abc'
    int(a)
except ValueError as any_old_name:
    print("any_old_name has the type of {}".format(type(any_old_name)))
    print("\nI'm using any_old_name for the error details--> {}".format(any_old_name))

#outputs
any_old_name has the type of <class 'ValueError'>

I'm using any_old_name for the error details--> invalid literal for int() with base 10: 'abc'

Answer 2 · 2019-04-28T15:59:00Z

April 28, 2019 3:59pm

I see, but I’m the video, by assigning ValueError into a variable, it “fix” the code and the previous if statement would raise an error. But without the variable ‘err’. The code wouldn’t raise an error.

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Aidan L.

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What does err do in Python

2 Answers

Dave StSomeWhere

Dave StSomeWhere

Aidan L.

Aidan L.

Spencer Hurrle

Spencer Hurrle