file_parts.py

class UDSFile(object):
    def __init__(self, name, base64, mime, size, encoded_size, id=None, parents=None, size_numeric=None, shared=False,
                 md5=None):
        self.name = name
        self.base64 = base64
        self.mime = mime
        self.size = size
        self.size_numeric = size_numeric
        self.encoded_size = encoded_size
        self.parents = parents or ["root"]
        self.id_ = id
        self.shared = shared
        self.md5 = md5 or ''


class Chunk:
    CHUNK_READ_LENGTH_BYTES = 750000

    def __init__(self, path, part, max_size, media, parent):
        self.path = path
        self.part = part
        self.range_start = part * Chunk.CHUNK_READ_LENGTH_BYTES
        self.media = media
        self.parent = parent

        range_end = ((part + 1) * Chunk.CHUNK_READ_LENGTH_BYTES)

        if range_end > max_size:
            self.range_end = max_size
        else:
            self.range_end = range_end