条件控制
if，if-else，if-elseif-else
#!/bin/python a = 'test'
if a == 'test':
print('a is %s' %(a))
else:
print('a is not test') if a == 'test':
print('a is test') a = 'other'
if a == 'test':
print('a is test')
elif a == 'test1':
print('a is test1')
else:
print('a is not test or test1')
输出结果：
a is test
a is test
a is not test or test1
for循环控制
for循环中，加入控制流程：for-continue（继续循环），for-break（跳出循环）
#!/bin/python for i in range(1, 3):
print(i) for i in [1, 2, 3]:
print(i) for i in range(0, 100):
if i <= 20:
continue
else:
if i >= 25:
break
else:
print(i)
输出结果：
1
2
1
2
3
21
22
23
24
while循环控制
#!/bin/python i = 0
while i <= 20:
if i < 10:
i += 1
continue;
elif i >= 10 and i <= 15:
i += 1
elif i == 16:
break
else:
i += 1
print(i)
输出结果：
11
12
13
14
15
16