Python3 elapsed time implementations in Class, Generator, and Functions for discussion and education

elapsed.py

# elapsed timer: as generator
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# Gerry Jenkins

import time

class ElapsedTime():

    def __init__(self):
        # store only start time
        self.start = time.time()
        
    def __call__(self): 
        return time.time() - self.start
        
        
if __name__ == "__main__":
    
    e1 = ElapsedTime()
    for _ in range(5):
        print(f'e1: {e1()*1000000:0.1f} µsecs')
        
    e2 = ElapsedTime()
    for _ in range(5):
        print(f'e1: {e1()*1000000:0.1f} | e2: {e2()*1000000:0.1f}')
        

elapsedfun.py

# elapsed timer: functional
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# Gerry Jenkins

import time

def elapsed_timer():
  start = time.time()
  return lambda : time.time() - start
 
 
if __name__ == "__main__":
    e1 = elapsed_timer()
    for _ in range(5):
        print(f'e1: {e1()*1000000:0.1f} µsecs')
        
    e2 = elapsed_timer()
    for _ in range(5):
        print(f'e1: {e1()*1000000:0.1f} | e2: {e2()*1000000:0.1f}')

elapsedgen.py

# elapsed timer: as generator
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# Gerry Jenkins

import time

def elapsed_time():
    start = time.time()
    while 1:
        yield time.time() - start
        
        
if __name__ == "__main__":
    e1 = elapsed_time()
    for _ in range(5):  # use e1
        print(f'e1: {next(e1)*1000000:0.1f} µsecs') # unicode micro
        
    e2 = elapsed_time()
    for _ in range(5):  # use both e1 and e2
        print(f'e1: {next(e1)*1000000:0.1f} | e2: {next(e2)*1000000:0.1f}')
        

notes.txt

I want to build an elapsed timer 'thing' for a simple game I am doing.

class, generator, or function?

Use:

- create a timer starting at zero

- query the elapsed time since creation at any point after



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