Python局部作用域不能使用其它局部作用域的变量
例子：def spam(): egg = 99 bacon() print(egg) def bacon(): ham =101 egg = 0 spam() 例子中只输出了spam()的egg，而spam()中引用的bacon()没有输出结果，所以egg = 0属于另一个作用域中的赋值，使用过后就销毁了，如果在结尾在加上print(egg),也会出现报错
Python return返回值
例：import random def getAn(answer): if answer == 1: return 'one' elif answer == 2: return 'tow' elif answer == 3: return 'three' elif answer == 4: retur
Python def函数及参数
自定义函数例一：def hello(): print("K") print("J") print("I") print('\n') hello() hello() hello() 例二：def hello(name): print('hello '+name) hello("Alic
Python sys.exit语句提前结束
例：import syswhile True:print("Type exit to exit.") res = input("请输入：") if res == "exit": sys.exit() print("You type " + res +'.')
Python 模块导入
例一：导入随机数模块，显示5次1-10中的随机数import random for i in range(1,6): print(random.randint(1,10))
Python for语句&range()语句
例一：打印名字5次：print('请输入名字5次') for i in range(5): i = i+1 print("Jim:",i) 等价的whileprint("输出5次名字") i=1 while i<6: print("Jim:",i) i+=1 例二：计算出0-100的和：total
Python While循环continue、break语句
1.while 循环 语句spam = 0 while spam <5: print("Hello Word:",spam) spam +=1 2.while的break语句name = '' while name != "your name": print("Now your name:",name)