problem in loop

[perfringo]

ThomasL refactored code to take advantage of else: clause in for-loop (no need for sentinel):

>>> name = 'lizzy'
>>> for wife, husband in husbands:
...     if  wife == name:
...         print(f"{wife.title()}'s husband is {husband.title()}")
...         break                      
... else:                              # no-break
...     print(f"{name.title()} might be single as she is not in the list")
... 
Lizzy's husband is Darcy

There is of course question of uniqueness. This code returns first match but if there are several wives with same name what is expected result?

For built-in help on for-loop (including else clause): >>> help('for')

EDIT:

One can approach this problem with another angle: get all matching pairs in list and use conditional to print appropriate information:

>>> matches = [f"{wife.title()}'s husband is {husband.title()}" for wife, husband in husbands if wife == name]
>>> if matches:
...     print(*matches, sep='\n')
... else:
...     print(f"{name.title()} might be single as she is not in the list")
...
Lizzy's husband is Darcy