Python Why Lambda Function
Why Use Lambda Functions?
The power of lambda is better shown when you use them as an anonymous function inside another function.
Say you have a function definition that takes one argument, and that argument will be multiplied with an unknown number:
def myfunc(n):
return lambda a : a * n
Use that function definition to make a function that always doubles the number you send in:
Example
def myfunc(n):
return lambda a : a * n
mydoubler = myfunc(2)
print(mydoubler(11))
Try it Yourself »
Or, use the same function definition to make a function that always triples the number you send in:
Example
def myfunc(n):
return lambda a : a * n
mytripler = myfunc(3)
print(mytripler(11))
Try it Yourself »
Or, use the same function definition to make both functions, in the same program:
Example
def myfunc(n):
return lambda a : a * n
mydoubler = myfunc(2)
mytripler = myfunc(3)
print(mydoubler(11))
print(mytripler(11))
Try it Yourself »
Use lambda functions when an anonymous function is required for a short period of time.
