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Time Python scripts
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"""Time functions using a decorator.""" | |
import time | |
from collections.abc import Callable | |
from functools import wraps | |
from typing import ParamSpec, TypeVar | |
P = ParamSpec("P") | |
R = TypeVar("R") | |
def time_function(func: Callable[P, R]) -> Callable[P, R]: | |
"""Time functions using a decorator.""" | |
@wraps(func) | |
def wrapper(*args: P.args, **kwargs: P.kwargs) -> R: | |
starting_time = time.perf_counter() | |
f_name = func.__name__ | |
f_name = "main function" if f_name == "main" else f'function "{f_name}"' | |
print(f"{time.strftime('%H:%M:%S', time.localtime())}: Starting {f_name}...") | |
result = func(*args, **kwargs) | |
elapsed_time = time.perf_counter() - starting_time | |
hours, remainder = divmod(int(elapsed_time), 3600) | |
minutes, seconds = divmod(remainder, 60) | |
time_str = [ | |
f"{n} {unit if n == 1 else unit + 's'}" | |
for n, unit in ((hours, "hour"), (minutes, "minute"), (seconds, "second")) | |
if n | |
] | |
t_len = len(time_str) | |
if not t_len: | |
time_str = "less than a second" | |
elif t_len < 3: | |
time_str = " and ".join(time_str) | |
else: | |
time_str = f"{time_str[0]}, {' and '.join(time_str[1:])}" | |
print(f"{f_name} took {time_str} to run.".capitalize()) | |
return result | |
return wrapper |
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