Try, except clause with if, else

Question

Let's imagine this code:

    try:
        if condition1 and condition2: # some_exception may happen here
            function1()
        elif condition3 and condition4: # some_exception may happen here
            function2()
        else:
            big
            block
            of
            instructions
    except some_exception:
        big
        block
        of
        instructions

As you can see I repeat big block of instructions (both are same). Is there a way to avoid repetition, but something different than putting the code in a function?

Some kind of different logic or using finally or else to try? I just can't figure it out.

Thanks in advance for helping me!

You could set a variable in your else and except clauses, and after the block, if the variable is set, call your big block of instructions. — khelwood
– khelwood, Commented Mar 14, 2019 at 19:19
Create a function from that big block and call it in the necessary places. — Miguel Machado
– Miguel Machado, Commented Mar 14, 2019 at 19:19
you could manually throw an exception in the else clause and only have to put the big block in the except — kmh
– kmh, Commented Mar 14, 2019 at 19:20

khelwood · Accepted Answer · 2019-03-14 19:21:24Z

6

If you are averse to using a function, how about setting a variable in both places, and checking it later?

Something like this:

do_stuff = False
try:
    if condition1 and condition2: # some_exception may happen here
        function1()
    elif condition3 and condition4: # some_exception may happen here
        function2()
    else:
        do_stuff = True
except some_exception:
    do_stuff = True
    ...

if do_stuff:
    big
    block
    of
    instructions

answered Mar 14, 2019 at 19:21

khelwood

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Comments

Mohit Sharma · Accepted Answer · 2019-03-14 19:47:59Z

1

try:
    if condition1 and condition2: # some_exception may happen here
        function1()
    elif condition3 and condition4: # some_exception may happen here
        function2()
    else:
         raise some_exception('This is the exception you expect to handle')
except some_exception:
    big
    block
    of
    instructions

What about this ?

Changed to raise as suggested by kaelwood

edited Mar 14, 2019 at 19:47

answered Mar 14, 2019 at 19:38

Mohit Sharma

3803 silver badges11 bronze badges

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