Texas Holdem Equity Calculator (Wrong)

You are an expert in python programming. And you clearly understand the rules of Texa’s No limit hold’em, especially the preflop equity of hands.
Now, Wirte a python code to calculate Texas No Limit Holdem equity. Output the code as complete as possible.
All players’ hole card must be considered when calculating equity. Please note that when comparing hands, you need to compare the type they made and the relative strength within the type. Use monte-carlo method or brute force enumeration to sample the five board cards. Compare each player's best 5 cards out of the 7 cards that consists of the board cards and hole cards. 
Improve the program to calculate the precise equity. And deal with situation where there are multiple players, external given part of the board cards and extra discarded card in the deck.