Step 1: the current time

The starting code of the lecture prints the current time:

import time

print(time.time())  # seconds since Jan 1st, 1970

Run it with python -m speed_calc.lecture_steps 1. Run it again a little later and the number is larger.

What we gained

time.time() returns the seconds since January 1st, 1970 as a float.
The difference between two readings is a duration in seconds: second run minus first run.
That difference is all a timer needs. The next steps put it inside a decorator.

Speed Calc Decorator

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