python-deep-dive/Function_Parameters/ApplicationTimer.py at master · maherme/python-deep-dive · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sat Mar 27 00:24:46 2021

@author: maherme
"""
#%%

import time

def time_it(fn, *args, **kwargs):
    print(args, kwargs)

time_it(print, 1, 2, 3, sep=' - ', end=' ***')

#%%

def time_it(fn, *args, **kwargs):
    fn(*args, **kwargs)

time_it(print, 1, 2, 3, sep=' - ', end=' ***')

#%%

def time_it(fn, *args, rep=1, **kwargs):
    for i in range(rep):
        fn(*args, **kwargs)

time_it(print, 1, 2, 3, sep=' - ', end=' ***\n', rep=5)

#%%

def time_it(fn, *args, rep=1, **kwargs):
    start = time.perf_counter()
    for i in range(rep):
        fn(*args, **kwargs)
    end = time.perf_counter()
    return (end - start) / rep

t = time_it(print, 1, 2, 3, sep=' - ', end=' ***\n', rep=5)
print(t)

#%%

def computer_powers_1(n, *, start=1, end):
    # using a for loop
    results = []
    for i in range(start, end):
        results.append(n**i)
    return results

c = computer_powers_1(2, end=5)
print(c)

#%%

def computer_powers_2(n, *, start=1, end):
    # using a list comprehension
    return [n**i for i in range(start, end)]

c = computer_powers_2(2, end=5)
print(c)

#%%

def computer_powers_3(n, *, start=1, end):
    # using generator expression
    return (n**i for i in range(start, end))

c = list(computer_powers_3(2, end=5)) # Notice we need to call list constructor
print(c)

#%%

t = time_it(computer_powers_1, 2, start=0, rep=5, end=20000)
print(t)
t = time_it(computer_powers_2, 2, start=0, rep=5, end=20000)
print(t)
t = time_it(computer_powers_3, 2, start=0, rep=5, end=20000)
# This is the faster because create a generator, the generator does not compute
print(t)

#%%