Pythonic

Question 1

Add boolean check to a class

Answer 1

class AClass:
    def \_\_init\_\_(self):
        self.data = []
    def \_\_bool\_\_(self):
        return True if self.data else False

Question 2

Choose a random character from a string

Answer 2

item = random.choice(string)

Question 3

Fastest check if something is ‘in’ for loop

Answer 3

for _ in range(0, 1000000):
    b = m in {Moves.North, Moves.South, Moves.West, Moves.East}  # slowest
		b = m == Moves.North or m == Moves.South or m == Moves.West or m == Moves.East  # slow
		b = m in {Moves.North, Moves.South, Moves.West, Moves.East}  # fastest

Question 4

Exit codes

Answer 4

import sys

sys.exit(0)  # success
sys.exit(1)  # failure

Question 5

Force the output buffer

Answer 5

import sys

for i in range(5):
    print(i, end=' ')
    sys.stdout.flush()  # Forces the buffer to flush
    time.sleep(1)

Question 6

How to prevent nesting?

Answer 6

Use guard clauses to invert ‘if’
~~~
if not data:
return “No data provided”
~~~