開啟Python
? ~ docker run --rm -ti python:alpine python
Python 3.7.0 (default, Jul 4 2018, 02:26:27)
[GCC 6.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
條件編程
>>> late = False
>>> if late:
... print('I need call my manager')
... else:
... print('no need to call my manager')
...
no need to call my manager
>>>
>>> if alert_system == 'console':
... print('console logging')
... elif alert_system == 'email':
... print('sending email')
... else:
... print('no logging')
...
console logging
>>>
- 三元運算符
>>> can_discount = True
>>> total = 100 if can_discount else 50
>>> total
100
>>> can_discount = False
>>> total = 100 if can_discount else 50
>>> total
50
>>>
循環
- for
>>> for number in [18, 30, 50]:
... print(number)
...
18
30
50
>>>
- range
>>> list(range(3,8))
[3, 4, 5, 6, 7]
- Sequence
>>> surnames = ['Paul', 'llitfkitfk', 'Tian']
>>> for surname in surnames:
... print(surname)
...
Paul
llitfkitfk
Tian
>>>
- for 循環可以用于lists / tuples等可以迭代的任何類型
>>> people = ['Paul', 'llitfkitfk', 'Tian']
>>> ages = [18, 30, 45]
>>> for person, age in zip(people, ages):
... print(person, age)
...
Paul 18
llitfkitfk 30
Tian 45
>>>
- while
>>> n = 39
>>> while n > 0:
... remainder = n % 2
... remainders.insert(0, remainder)
... n //= 2
...
>>> print(remainders)
>>>
>>> products = ['car', 'bike', 'truck']
>>> for product in products:
... if product == 'car':
... continue
... print(product)
...
bike
truck
>>>
break & continue
特殊的else
>>> class DriverException(Exception):
... pass
...
>>> products = ['car', 'bike', 'truck']
>>> for product in products:
... if product == 'ship':
... buy = 'ship'
... break
... else:
... raise DriverException('Driver not found')
...
Traceback (most recent call last):
File "<stdin>", line 6, in <module>
__main__.DriverException: Driver not found
>>>
