python Programming Glossary: lambdas

http://stackoverflow.com/questions/10452770/python-lambdas-binding-to-local-values

pv v return x x test for xx in x xx I expected python lambdas to bind to the reference a local variable is pointing to behind.. pv v to x.append lambda v v pv v . You expect python lambdas to bind to the reference a local variable is pointing to behind.. not when it is called. This is not something special about lambdas. Consider x before foo defined def foo print x x after foo was..

How to modify the local namespace in python

http://stackoverflow.com/questions/1142068/how-to-modify-the-local-namespace-in-python

No Multiline Lambda in Python: Why not?

http://stackoverflow.com/questions/1233448/no-multiline-lambda-in-python-why-not

in Python Why not I've heard it said that multiline lambdas can't be added in Python because they would clash syntactically.. couldn't think of a single Python construct that multiline lambdas clash with. Given that I know the language pretty well this.. I'm sure Guido had a reason for not including multiline lambdas in the language but out of curiosity what's a situation where..

Python lambda closure scoping

http://stackoverflow.com/questions/13355233/python-lambda-closure-scoping

share improve this question The reason is that closures lambdas or otherwise close over names not values. When you define lambda..

Which is more preferable to use in Python: lambda functions or nested functions ('def')?

http://stackoverflow.com/questions/134626/which-is-more-preferable-to-use-in-python-lambda-functions-or-nested-functions

functions and can cover all use cases without the need of lambdas. For the cases you really need a small function object you should..

Why results of map() and list comprehension are different?

http://stackoverflow.com/questions/139819/why-results-of-map-and-list-comprehension-are-different

lambda i i 1 # 2. from t x.append lambda i Now the lambdas carry around a closure that references i but i is bound to 1..

Local scope, beyond the scope of the enclosing

http://stackoverflow.com/questions/17167764/local-scope-beyond-the-scope-of-the-enclosing

L 0 .__closure__ 0 .cell_contents 4 This is also why all lambdas in your list L refer to the value 4 and not to the numbers 0.. looking up i in the lambda closure 4 will be found for all lambdas in your list. If you want your lambdas to refer to the value.. be found for all lambdas in your list. If you want your lambdas to refer to the value of i during the loop capture it in a keyword..

Why program functionally in Python?

http://stackoverflow.com/questions/1892324/why-program-functionally-in-python

bandwagon. And their code now contains lots more lambdas maps and reduces. I understand that functional languages are..

Python: Why is functools.partial necessary?

http://stackoverflow.com/questions/3252228/python-why-is-functools-partial-necessary

does functools.partial offer that you can't get through lambdas sum lambda x y x y sum 1 2 3 incr lambda y sum 1 y incr 2 3.. does functools.partial offer that you can't get through lambdas Not much in terms of extra functionality but see later and readability..

Creating lambda inside a loop [duplicate]

http://stackoverflow.com/questions/7546285/creating-lambda-inside-a-loop

closure the parameter in Python I am trying to create lambdas inside a loop that iterates over a list of objects lambdas_list.. lambdas inside a loop that iterates over a list of objects lambdas_list for obj in obj_list lambdas_list.append lambda obj.some_var.. over a list of objects lambdas_list for obj in obj_list lambdas_list.append lambda obj.some_var Now if I iterate over the lambdas..