I want to remove all elements in a list which contains (or does not contain) a set of specific characters, however I’m running in to problems iterating over the list and removing elements as I go along. Two pretty much equal examples of this is given below. As you can see, if two elements which … Read more
I’ve been trying to learn how CPython is implemented under the scenes. It’s great that Python is high level, but I don’t like treating it like a black box.
I want to create a python dictionary that returns me the key value for the keys are missing from the dictionary.
How can one neatly represent a graph in Python? (Starting from scratch i.e. no libraries!)
What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient?
One must be able to do various graph operations on it.
In Python 3.3 a ChainMap class was added to the collections module:
So I have a python dictionary, call it d1, and a version of that dictionary at a later point in time, call it d2. I want to find all the changes between d1 and d2. In other words, everything that was added, removed or changed. The tricky bit is that the values can be ints, strings, lists, or dicts, so it needs to be recursive. This is what I have so far:
I have two lists
I am looking for a solid implementation of an ordered associative array, that is, an ordered dictionary. I want the ordering in terms of keys, not of insertion order.