class_docstr: Calculates spread between bid/ask and also tick count.
  
      
class_docstr_tok: ["Calculates","spread","between","bid\/ask","and","also","tick","count","."]
code: def __init__(self):
      self.logger = LoggerManager().getLogger(__name__)
      return
  
imports: import pandas
  from findatapy.util.loggermanager import LoggerManager
label_desc: Use image node_id 1 to create a new MarketLiquidity object from inherited base classes: object with example: obj = MarketLiquidity()