Comparison of lambda and def usage in python-Python tutorial

This article mainly introduces the usage comparison between lambda and def in python. the example analyzes the differences and usage skills between lambda and def, which has some reference value, for more information about lambda and def usage in python, see the examples in this article. Share it with you for your reference. The specific analysis is as follows:

1. lambda is used to create an anonymous function. it is different from def (the function created by def has a name ).
2. lambda does not assign the result to an identifier, while def assigns the function result to an identifier.
3. lambda is an expression, while def is a statement.

Example program:

>>> F1 = lambda x, y, z: x * 2 + y + z # lambda has multiple parameters >>> print f1 (3,2, 1) 9 >>> f3 = lambda I: I * 2 # lambda has a parameter >>> print f3 (7) 14 >>> def fun1 (n ):... return lambda m: m ** n # n power of m...> 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 )) # Use lambda as a function parameter 6 >>>

I hope this article will help you with Python programming.