How do I iterate over dictionary list positions in python

Question

Hi I have a dictionary where the values are lists.

position = {"a" :[0,0], "b":[0,100], "c":[50,100], "d": [50, 0]}

I'm inserting each dictionary value into a handler.

poly_pos = [position["a"], position["b"], position["c"], position["d"]]

I want to iterate over the dictionary list and add value to the 0th element of each list position.

For instance for position["a"][0] I want to add 50, and for every subsequent ["letter"][0] element of each list in the dictionary I want to add 50.

If this isn't the best way to solve this, I'm curious to know other ways I can solve, maybe without using dictionary value pairs.

Answer 1

position.values() gives the same thing as your definition of poly_pos:

for p in position.values():
    p[0] += 50

You can also use position.itervalues() to avoid creating the list if you're using Python 2.