What would be a good reason to use Lambdas as a normal function?

Question

example from lesson:

double = lambda x: x * 2
print(double(7))

output

14

Answer 1

The syntax is more concise in certain situations, mostly when dealing with mapet al.
ex:-
map(lambda x: x * 2, [1,2,3,4])

seems better to me than:

def double(x):
return x * 2 map(double, [1,2,3,4])

I think the lambda is a better choice in this situation because the def double seems almost disconnected from the mapthat is using it. Plus, I guess it has the added benefit that the function gets thrown away when you are done.

There is one downside to lambda which limits its usefulness in Python, in my opinion: lambdas can have only one expression (i.e., you can't have multiple lines). It just can't work in a language that forces whitespace.

Answer 2

In C# I use lambdas a lot for simply calling functions with different but similar parameters than the delegate I need to pass.
myVar.SetLogFunction(message => log.Write(LogStatus.Info, message));