For loops are used to iteratre over an interator.

Use only when either the functionality can't be accomplished with a {dict, list} comprehension and/or the syntax would be too unreadable.

# standard search for item in items
for item in iterator:
    if item == "something":
        result = do_something(item)
        break   # we found the target and can exit

    else:
        # optional
        # Loop fell through without finding the target
        do_something_else()


# use continue to skip expensive processing on non-interesting items
for item in iterator:
    if item == "something else":
        continue    # Skip to next item in iterator

    do_something_expensive(item)

References:

1. https://docs.python.org/3/tutorial/controlflow.html#break-and-continue-statements-and-else-clauses-on-loops