python function - a function object

python function - a function object

laboratory

When the function is defined, it is similar to a = 1, a function called variable name

def zx():
    pass
print(zx)
zx=21
print(zx)

<function zx at 0x000001D825F73E18>
21

Four functions function object

1. references

def func():
    print('zx')
    return "返回值"
f = func
print(f)
print(f())

<AT 0x0000024231873E18 function FUNC>
ZX
Return value

2 can be used as an argument to a function

def func():
    print("zx")
def foo(m):
    m()
foo(func)

ZX
3. can be used as the return value of the function

def zx():
    print("zx")
def zx2():
    return zx
zx2()()

zx

4. The container can be used as an element of type

def zx():
    print("zx")
def zx2():
    return zx
def zx3():
    print("大家好")
x=[zx,zx2,zx3]
x[2]()

Hello everyone