code: def from_dict(data, ctx):
          
  
          data = data.copy()
  
          if data.get('price') is not None:
              data['price'] = ctx.convert_decimal_number(
                  data.get('price')
              )
  
          if data.get('longCountPercent') is not None:
              data['longCountPercent'] = ctx.convert_decimal_number(
                  data.get('longCountPercent')
              )
  
          if data.get('shortCountPercent') is not None:
              data['shortCountPercent'] = ctx.convert_decimal_number(
                  data.get('shortCountPercent')
              )
  
          return PositionBookBucket(**data)
docs: Instantiate a new PositionBookBucket from a dict (generally from
          loading a JSON response). The data used to instantiate the
          PositionBookBucket is a shallow copy of the dict passed in, with any
          complex child types instantiated appropriately.