Example analysis of the difference between Lambda and def usage in Python

This article mainly introduces the comparison between Lambda and def usage in Python, and analyzes the difference between Lambda and def and the use of it, which has a certain reference value, and the need for friends can refer to

This paper compares and analyzes the usage of lambda and def in Python. Share to everyone for your reference. The specific analysis is as follows:

1. Lambda is used to create anonymous functions, unlike Def (the function created by Def has a name).
2. Lambda does not assign the result to an identifier, and DEF assigns the result of the function to an identifier.
3, Lambda is an expression, and DEF is a statement

Sample program:

>>> f1 = Lambda X,y,z:x*2+y+z # lambda with multiple parameters >>> print F1 (3,2,1) 9>>> F3 = Lambda i:i*2 # lambda With a parameter >>> print F3 (7) 14>>> def fun1 (n): ...   Return Lambda M:m**n # m n ...>>> def fun2 (M, n): ...   return m+n...>>> F2 = fun1 (2) # dynamically generate a function >>> print F2 (4) 16>>> print fun2 (3, (Lambda x:x+1) (2)) # Lambda is used as a function parameter 6>>>