def __init__(self, target, width=<NUM_LIT:30>, verbose=<NUM_LIT:1>, interval=<NUM_LIT>):
self.width = width<EOL>self.target = target<EOL>self.sum_values = {}<EOL>self.unique_values = []<EOL>self.start = time.time()<EOL>self.last_update = <NUM_LIT:0><EOL>self.interval = interval<EOL>self.total_width = <NUM_LIT:0><EOL>self.seen_so_far = <NUM_LIT:0><EOL>self.verbose = verbose<EOL>
Dislays a progress bar.

        # Arguments:
            target: Total number of steps expected.
            interval: Minimum visual progress update interval (in seconds).