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Under utils/common.py, 

TIMESTAMP_FORMAT_MILLIS = '%Y-%m-%dT%H:%M:%S.%fZ'

The %f produces time with microseconds, for example: 2020-03-18T19:43:18.115783Z.


However, when interacting the AWS s3 and sns apis, I receive DateTimes like this:

2020-03-02T22:32:13.240Z
i.e. milliseconds. 

This seems like a simple change to the utils. TIMESTAMP_FORMAT_MILLIS is named as if it should be millis as well. This is seems like a simple change. Is there a reason it should be microseconds?
""" Merge all dicts in `*dicts` into a single dict, and return the result. If any of the entries
        in `*dicts` is None, and `default` is specified as keyword argument, then return `default`. """
    result = {}
    for d in dicts:
        if d is None and 'default' in kwargs:
            return kwargs['default']
        if d:
            result.update(d)
    return result
def recurse_object(obj, func, path=''):
    """ Recursively apply `func` to `obj` (may be a list, dict, or other object). """
    obj = func(obj, path=path)
    if isinstance(obj, list):
        for i in range(len(obj)):
            tmp_path = '%s[%s]' % (path or '.', i)
            obj[i] = recurse_object(obj[i], func, tmp_path)
    elif isinstance(obj, dict):
        for k, v in obj.items():
            tmp_path = '%s%s' % ((path + '.') if path else '', k)
            obj[k] = recurse_object(v, func, tmp_path)
    return obj
def base64_to_hex(b64_string):