function.__doc__function(a = x, b = y) 关键字参数def function(a = x, b = y): 默认值参数def function(*params) 收集参数，可输入多个参数打包为元组函数无return时返回Nonegloble 将局部变量转化为全局变量闭包
def FunX(x):
def FunY(y):
return x * y
return FunY
FunX(8)(5)
def Fun1():
x = 5
def Fun2():
nonlocal x
x *= x
return x
return Fun2()
lambda 匿名函数g = lambda x : 2 * x + 1g(5)g = lambda x, y : x + yg(3, 4)
filter()list(filter(None, [1, 0, False, True]))
def odd(x):
return x % 2
temp = range(10)
show = filter(odd, temp)
list(show)
list(filter(lambda x : x % 2, range(10)))
map 映射list(map(lambda x : x * 2, range(10)))
递归import syssys.setrecursionlimit(n)
