12 ms·

You can write one line if statements in Python. You can also do conditional assignment with the ternary operator. i.e. if True: a = 1 if True else 0

• adamrt 5y ago
  > a = 1 if True else 0
• 3pt14159 5y ago
  Why should I need an else statement to use an if statement?
  • Jtsummers 5y ago
    You said you missed two things in Python: > Oh and how I miss one line if statements and conditional assignment when I'm in Python. derac provided an example exercising both. To separate them: One line if statements: if predicate: expression Conditional assignment: a = 1 if predicate else 0 The else is to permit the conditional assignment, it's a ternary operation, it is not for the if statement.
    • 3pt14159 5y ago
      Well, sorta. In practice people don't use one line statements and it's considered unpythonic. So much so I forgot it was even possible, so you're right, I was wrong. Black converts it to a multiline statement. Also, the Ruby syntax for them is better because it makes it clear it isn't a mistake. launch_nuclear_weapons if at_total_war Just reads better because it doesn't look like a mistaken if statement. By conditional assignment, I meant more something like this: some_var ||= 45 And I know I can do either: some_var = some_var or 45 some_var = some_var if some_var else 45 But it just looks stupid and it is such a frequent need due to the way default args work for things like dicts, that it gets annoying.
      • derac 5y ago
        check out defaultdict :D https://docs.python.org/3/library/collections.html https://docs.python.org/3/library/collections.html