code: def read_var_int(file_obj):
      
      # Read all bytes from here, stopping with the first one that does not have
      # the MSB set. Save the lower 7 bits, and keep stacking to the *left*.
      val = 0
      shift = 0
      while True:
          # Read next byte
          next_val = ord(file_obj.read(1))
          val |= ((next_val & 0x7F) << shift)
          shift += 7
          if not next_val & 0x80:
              break
  
      return val
docs: Read a variable-length integer.
  
      Parameters
      ----------
      file_obj : file-like object
          The file to read from.
  
      Returns
      -------
      int
          the variable-length value read