Times code within a contextmanager with useful stack information in output

context_timer.py

import time
import contextlib
import inspect

_DEBUG = False


@contextlib.contextmanager
def Timer(name, debug=_DEBUG):
    if not debug:
        yield
        return
    start = time.time()
    yield
    end = time.time()

    path = [name]
    for frame in inspect.stack()[2:]:
        if frame[3] == "<module>":
            break
        path.append(frame[3])

    path_str = ".".join(reversed(path))
    print("Timer: {}: {:0.5f}s".format(path_str, end-start))