def update_to(self, b=<NUM_LIT:1>, bsize=<NUM_LIT:1>, tsize=None):
if tsize is not None:<EOL><INDENT>self.total = tsize<EOL><DEDENT>self.update(b * bsize - self.n)<EOL>
b  : int, optional
    Number of blocks transferred so far [default: 1].
bsize  : int, optional
    Size of each block (in tqdm units) [default: 1].
tsize  : int, optional
    Total size (in tqdm units). If [default: None] remains unchanged.