How to calculate the total execution time of functions?

Question

Python

Tell me how to get the total execution time of functions (a and b) and how to switch to timeit?

def a():
   start_time = time.time()
   print("--- %s sec ---" % (time.time() - start_time))

def b():
   start_time = time.time()
   print("--- %s sec ---" % (time.time() - start_time))

if __name__ == "__main__":
   a()
   b()

Answer 1

def a():
   # do something 1

def b():
   # do something 2

if __name__ == "__main__":
   start_time = time.time()
   a()
   b()
   print("--- %s sec ---" % (time.time() - start_time))