Enclosing function simply means that the function returns a function. It can be extended to the use of decorator, but this is a brief introduction to the enclosing function.
When you have an addition function, fill in a, b and get c, but for the time being you only need to change a, and b are 5, so you might use the default parameter b=5
def add(a, b=5):
return a + b
add(3) # 8
add(4) # 9
add(5) # 10This method has to be rewritten once when b needs to be changed, which is obviously not very good.
This is when the enclosing function comes into play.
def add_withb(b):
def add(a):
return a + b
return add
add4 = add_withb(4)
add4(3) # 7
add4(7) # 11
add5 = add_withb(5)
add5(4) # 9
add5(5) # 10| Article | Link |
|---|---|
| [python] Why Enclosing Function? | http://blog.ittraining.com.tw/2019/12/python-why-enclosing-function.html |