class_docstr: Wrapper around Tqdm pbar which be shared between thread.
class_docstr_tok: ["Wrapper","around","Tqdm","pbar","which","be","shared","between","thread","."]
docstr: Increment total pbar value.
docstr_tok: ["Increment","total","pbar","value","."]
code: def update_total(self, n=1):
      """Increment total pbar value."""
      with self._lock:
          self._pbar.total += n
          self.refresh()
  
imports: import contextlib
  import os
  from tqdm import auto
label_desc: Use image node_id 2 for calling the _TqdmPbarAsync obj's underlying member method code with example usage: obj.update_total(n) without return types