If I have sequence of sequences (maybe a list of tuples) I can use itertools.chain() to flatten it. But sometimes I feel like I would rather write it as a comprehension. I just can’t figure out how to do it. Here’s a very construed case: Let’s say I want to swap the elements of every … Read more
I have two lists as below
The following behaviour seems rather counterintuitive to me (Python 3.4):
It’s more about python list comprehension syntax. I’ve got a list comprehension that produces list of odd numbers of a given range:
I was playing around with list comprehensions to get a better understanding of them and I ran into some unexpected output that I am not able to explain. I haven’t found this question asked before, but if it /is/ a repeat question, I apologize.
I wanted to create a list of lambdas, but it didn’t quite work out as I hoped. L = [(lambda x: x/y) for y in range(10)] I expected every function in the list to divide its argument by its index, but all functions only divide by the last index. >>> L[1](5) 0.5555555555555556 >>> L[5](5) 0.5555555555555556 … Read more
Say I have a list like so:
I have some a list comprehension in Python in which each iteration can throw an exception.
Is it possible to define a recursive list comprehension in Python?