Day04-Python基础函数

def foo():
    print(‘from foo‘)

func=foo      ##foo值赋给了func

print(foo)    ##<function foo at 0x006E4108>
print(func)   ##<function foo at 0x006E4108>
func()        ##foo值赋给了func ,所以可以直接()引用

def foo():
    print(‘from foo111111‘)
def bar(func):
    print(func)
    func()
bar(foo)

def foo():
    print(‘from foo‘)
def long(func):
    return func
f=long(foo)
print(f)
f()

def foo():
    print(‘from foo‘)
dic = {‘fuck‘:foo}
print(dic[‘fuck‘])
dic[‘fuck‘]()

def select(sql):
    print(‘------>select‘)
def update(sql):
    print(‘------>update‘)
def delete(sql):
    print(‘------>delete‘)
def insert(sql):
    print(‘------>insert‘)

fun_dit={
    ‘select‘:select,
    ‘update‘:update,
    ‘delete‘:delete,
    ‘insert‘:insert
}
def main():
    while True:
        sql = input(‘>>>:‘).strip()
        if not sql: continue
        l = sql.split()
        cmd= l[0]
        if cmd  in fun_dit:
            fun_dit[cmd](l)
main()

def max2(x,y):
    return x if x > y else y

def max4(a,b,c,d):
    res1=max2(a,b)
    res2=max2(res1,c)
    res3=max2(res2,d)
    return res3
print(max4(10,80,31,20))

def f1():

    def f2():
        print(‘from foo f2‘)
        def f3():
            print(‘from foo f3‘)

        f3()
    f2()
f1()