Question

I am trying to create 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)

Now, if I iterate over the lambdas list and call them like this:

for f in lambdas_list:
    print(f())

I get the same value. That is the value of the last obj in obj_list since that was the last variable in the block of the list iterator. Any ideas for a good (pythonic) rewrite of the code to make it work?

Answer 1

Use this line instead:

lambdas_list.append(lambda obj=obj: obj.some_var)