class_docstr: Model slippage as a fixed value.
  
  Parameters
  ----------
  slippage : float, optional
      fixed slippage will be added to buys and subtracted from sells.
class_docstr_tok: ["Model","slippage","as","a","fixed","value",".","Parameters","--","--","--","--","--","slippage",":","float",",","optional","fixed","slippage","will","be","added","to","buys","and","subtracted","from","sells","."]
code: def __init__(self, slippage=0.0001):
      super(TradingPairFixedSlippage, self).__init__()
      self.slippage = slippage
  
imports: import numpy
  import pandas
  from logbook import Logger
  from redo import retry
  from catalyst.assets._assets import TradingPair
  from catalyst.constants import LOG_LEVEL
  from catalyst.exchange.exchange_errors import ExchangeRequestError
  from catalyst.finance.blotter import Blotter
  from catalyst.finance.commission import CommissionModel
  from catalyst.finance.order import ORDER_STATUS
  from catalyst.finance.slippage import SlippageModel
  from catalyst.finance.transaction import create_transaction
  from catalyst.utils.input_validation import expect_types
label_desc: Use image node_id 1 to create a new TradingPairFixedSlippage object from inherited base classes: SlippageModel with example: obj = TradingPairFixedSlippage(slippage)