Added dictionary filter function

import copy

import operator

from functools import reduce

def axes_to_array(coordinate_dictionary, axis_keys=['x', 'y', 'z'], base_array=None):

    """Takes key-value pairs of a JSON value, and maps onto an array"""

            base_array[axis] = coordinate_dictionary[key]

    return base_array

def filter_dict(dictionary: dict, keys: list):

	# Get value by recursively applying getitem

	val = reduce(operator.getitem, keys, dictionary)

	# Create new dictionary by running reduce on key, val pairs

	out = reduce(lambda x, y: {y: x}, reversed(keys), val)

	return out

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