🕵️ Stack Trace Lineup

import asyncio

async def gather_all():
    return await asyncio.gather(
        asyncio.sleep(0.1, result="a"),
        asyncio.sleep(0.1, result="b"),
    )

print(asyncio.run(gather_all()))

# (no error)
['a', 'b']

import asyncio

async def fetch():
    return 42

def caller():
    result = await fetch()
    return result

print(caller())

Traceback (most recent call last):
  File "lineup.py", line 9, in <module>
    print(caller())
          ~~~~~~^^
  File "lineup.py", line 7, in caller
    result = await fetch()
RuntimeError: cannot use 'await' in a non-async function

from functools import partial

def power(base, exp):
    return base ** exp

square = partial(power, exp=2)
print(square(5), square(10))

# (no error)
25 100

import struct
packed = struct.pack(">HH", 100, 200)
print(packed.hex())

# (no error — big-endian 2 unsigned shorts)
006400c8

from enum import IntEnum

class Priority(IntEnum):
    LOW = 1
    HIGH = 10

print(Priority.HIGH * 2, Priority.HIGH > Priority.LOW)

# (no error — IntEnum members ARE ints + can be compared and arithmetic'd)
20 True