python使用建议与技巧分享（二）

flag1 = 1
flag2 = 0
flag3 = 0

if flag1 == 1 or flag2 == 1 or flag3 == 1:
print 'ok'

flag1 = 1
flag2 = 0
flag3 = 0

if 1 in (flag1, flag2, flag3):
print 'ok'

if any((flag1, flag2, flag3)):
print 'ok'

import random


all_data = [num for num in range(100)]
sample_data = random.sample(all_data, 20)
print sample_data
# [71, 25, 58, 79, 70, 69, 93, 29, 11, 30, 40, 81, 12, 48, 91, 21, 83, 42, 38, 31]

import random


order_list = range(10)
print order_list
# [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
random.shuffle(order_list)
print order_list
# [3, 5, 9, 0, 8, 7, 1, 2, 6, 4]

import time


def func1():
time.sleep(2)


begin_time = time.time()
func1()
passed_time = time.time() - begin_time
print passed_time
# 2.00099992752

import time
from timeit import timeit


def func1():
time.sleep(2)


print timeit(stmt="func1()",
setup="from __main__ import func1",
number=1)
# 2.00122451254