Elif-row without else python

Question

Is it possible to write an else at the end of an if-row which only gets executed if none of all the if statements are true? Example:

if foo==5:
    pass
if bar==5:
    pass
if foobar==5:
    pass
else:
    pass

In this example, the else part gets executed if foobar isn't 5, but I want it to be executed if foo, bar and foobar aren't 5. (But, if all statements are true, all of them have to be executed.)

Solution 1

I don't think there's any overly elegant way to do this in Python or any other language. You could store the values in a list but that would obfuscate the actual test ifs, e.g.

tests = [bar ==4, foo == 6, foobar == 8]

if tests[0] :
  # do a thing
if tests[1] :
  # Make a happy cheesecake
if tests[2] :
  # Oh, that's sad

if not True in tests :
  # Invade Paris

Or you could set a tracking flag

wereAnyTrue = False

if foo == 4 :
  # Do the washing
  wereAnyTrue = True
if bar == 6 :
  # Buy flowers for girlfriend
  wereAnyTrue = True

# ... etc

if not wereAnyTrue :
  # Eat pizza in underpants

Solution 2

How about doing something like this? Making four if statements but the fourth if statement won't be run if one of the other three is run because the other statements change the variable key

key = True

if foo == 5:
    key = False
if bar == 5:
    key = False
if foobar == 5:
    key = False
if key:
    pass # this would then be your else statement

Solution 3

Not directly - those three if blocks are separate. You could use nesting, but that would get pretty complex; the neatest way to accomplish this is probably:

if foo == 5:
    ...
if bar == 5:
    ...
if foobar == 5:
    ...
if not any((foo == 5, bar == 5, foobar == 5)):
    ...

Solution 4

If all the if statements are for checking for the same value, I would use the following format instead. It would make the code shorter and more readable, IMO

if 5 in (foo, bar, foobar):
    pass
else:
    pass

View more solutions

Comments

[jonrsharpe]

At least use a boolean for key1!

[Nearoo]

Thanks for the idea - but I my statements aren't always 5... :/

[jonrsharpe]

@user3424423 perhaps you should have used a clearer example. Nonetheless, any can be used.

[Nearoo]

Thanks for your answer, I will use this solution since I'm able to find out wheter something was true or not anyways. I just thought - maybe python has it's own, easier way of doing it... :)

[Nearoo]

Yeah. I'll remember that. Thanks.