# if
if condition1:
    statement1
elif condition2:
    statement2
else:
    statment3

# for
for i in range(5):
    my_func(i)
 
# while
i = 0
while i < 5:
    my_func(i)
    i += 1

# try ... except ...
try: 
    my_func()
except Exception as e:
    print(e)
    raise

# Source: https://stackoverflow.com/a/9980752/1392860
for i in mylist:
    if i == target:
        break
    process(i)
else:
    raise ValueError("List argument missing terminal flag.")
# 所以无需专门建立一个临时标记变量来标记是否已经找到了 target

for i in range(3):
    print(i)
    if i % 2 == 0:
        break
else:
    print("end")
'''
0
'''

for i in range(3):
    print(i)
 
 
else:
    print("end")
'''
0
1
2
end
'''

# if
if condition1:
    statement1
elif condition2:
    statement2
else:
    statment3

# for
for i in range(5):
    my_func(i)
 
# while
i = 0
while i < 5:
    my_func(i)
    i += 1

# try ... except ...
try: 
    my_func()
except Exception as e:
    print(e)
    raise

while True:
    try:
        x = int(input("Please enter a number: "))
        break    
        # Don't forget stop the Loop!
    except ValueError:
        print("Oops!  That was no valid number.  Try again...")

# if
if condition1:
    statement1
elif condition2:
    statement2
else:
    statment3

# for
for i in range(5):
    my_func(i)
 
# while
i = 0
while i < 5:
    my_func(i)
    i += 1

# try ... except ...
try: 
    my_func()
except Exception as e:
    print(e)
    raise

def divide(x, y):
    try:
        result = x / y
    except ZeroDivisionError:
        print("division by zero!")
    else:
        print("result is", result)
    finally:
        print("executing finally clause")

>>> divide(2, 1)
'''
result is 2.0
executing finally clause
'''
>>> divide(2, 0)
'''
division by zero!
executing finally clause
'''
>>> divide("2", "1")
'''
executing finally clause
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in divide
TypeError: unsupported operand type(s) for /: 'str' and 'str'
'''

# if
if condition1:
    statement1
elif condition2:
    statement2
else:
    statment3

# for
for i in range(5):
    my_func(i)
 
# while
i = 0
while i < 5:
    my_func(i)
    i += 1

# try ... except ...
try: 
    my_func()
except Exception as e:
    print(e)
    raise

from random import sample as love_from_boss
 
while luck not in my_life:
    if holiday and love_from_boss([0]*364+[1], 1)[0]:
        print('Happiness!')
        My_life_my_choice(max_power=True, sleep_24h=True)
 
    wakeup()
    breakfasts()
    working()
    
    lunch()
    try:
        sleep(1)
        lifespan += 1
        bonus -= 100
    except:
        lifespan -= 1
    working()
 
    try:
        bodyshaping()
        bodyweight -= 20
    except:
        bodyweight += 20
    dinner()
 
    while not luck:
        try:
            submit(working.output, stress=True)
        except Exception as e:
            print('Boss: 这是什么鬼？', e)
            print('Boss: 滚去加班！')
            overworking()
        else:
            sleeping(until = 7)
            break
        finally:
            lifespan -= 10
        if lifespan <= 0:
            dead()
            print('Game over')
            break

std1 = { 'name': 'Michael', 'score': 98 }
std2 = { 'name': 'Bob', 'score': 81 }
 
# 处理学生信息可以通过函数实现，比如打印学生的成绩：
 
def print_core(std):
    print('%s : %s'%(std['name'],std['score']))
 
print_core(std1)
print_core(std2)

class Student(object): # 类
    def __init__(self,name,score):
        self.name = name    # 类的属性
        self.score = score    # 类的方法
    def print_score(self):
        print('%s : %s'%(self.name,self.score))
 
amy = Student('amy',120)  # 类对象的实例化
jack = Student('jack',108)
 
amy.print_score()
jack.print_score()

import random as r
 
class Fish():    # 父类
    def __init__(self):
        self.x =r.randint(0,10) # 类属性
        self.y =r.randint(0,10)
    def move(self):             # 类方法
        self.x -=1    # 一直向西移动
        print("我的位置是：",self.x, self.y)
# 利用继承演示鱼游动方向位置。
class Goldfish(Fish):    # 子类
    pass
class Salmon(Fish):        # 子类
    pass
class Shark(Fish):
    # 这里重写了__init__方法，就会覆盖掉父类的方法了，
    # 用到super函数后就可以继续使用父类的方法。
    def __init__(self):  
        # super函数不用给定任何基类的名字(如下)，它会一层层找出代码所有父类里面对应的方法，
        # 要改变该类的继承关系时只需修改这个类的父类就行就是括号里面的Fish。
        super().__init__()    # super().重写的属性或方法
        self.hungry = True
    def eat(self):
        if self.hungry:
            print("我要吃了。。。")
            self.hungry = False
        else:
            print('好饱了。。。')