The following is syntactically invalid: if extremely_long_condition_that_takes_up_a_whole_line and another_condition: # Do something The following is valid: if (extremely_long_condition and another_condition): # Do something Why are these different? More generally, why is #2 okay but #1 somehow dangerous/ambiguous? I can't see how the first statement is or generalizes to an ambiguous statement. Continue reading...