• Inspired by tjf801

For cool one-liners in the Python programming language (eval() and exec() are cheating) These are by no means meant to be efficient or fast, these are just for fun and to see if it's possible!

• Pretty sure this is given, but use lambdas and ternary conditionals
• It's pretty hard to debug single line scripts, so use a handy dandy function that allows you to print a value and return it like this:

def debug(thing):
  print(thing)
  time.sleep(1)
  return thing

• List comprehension is probably going to be your friend.
• If you need to call a function in list comprehension you can do something like the below, which allows you to call a function in your list comprehension without messing up the contents of the finished list

[(i, print(i))[0] for in in range(10)]

• Yes, the ; can be used in Python! A semicolon can be used to signify the end of a line. It, however, cannot be used inside sets of parentheses and brackets, but only at where the end of a line would be in regular Python. Example:

n = 2; [print(i) for i in range(n)]

• You can have optional arguments in your lambda functions just like in regular functions which you can use for temp variables, other lambda functions, or other useful things! Example:

(lambda thing=2: print(thing))

• Yes, you can do recursion with lambdas! Example:

f = lambda recurse, num: recurse(num-1) if num > 10 else num; f(f, 20)

• New in Python 3.8! The walrus operator / assignment expressions