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How to fix KeyError in pymongo 

class tradesReport(): 
    def saveBuyٍSelltrade(collection, ticker, buy, sell): 
        collection= db[collection] 
        newBuyTrade= {'Symbol': ticker, 'Buy': buy}
        buytrade=collection.insert_one(newBuyTrade)
        
        newSelltrade={'Symbol':ticker ,'Sell':sell}
        selltrade=collection.insert_one(newSelltrade) 
    def BUYtrade(collection,ticker,buy):
        collection= db[collection] 
        newBuyTrade= {'Symbol': ticker, 'Buy': buy}
        buytrade=collection.insert_one(newBuyTrade) 
        return buytrade
    def Selltrade(collection,ticker,sell):
        collection= db[collection] 
        newSellTrade= {'Symbol': ticker, 'Sell': sell}
        selltrade=collection.insert_one(newSellTrade) 
        return selltrade
        
    def findAllBuyTrades(collection): 
        tickers= {} 
        collection= db[collection] 
        data= collection.find({}) 
        for dt in data: 
            tickers[dt['Symbol']]= [dt['Symbol'],dt['Buy']]
        return tickers

The error is:

tickers[dt['Symbol']]= [dt['Symbol'],dt['buy']]
KeyError: 'buy'

mongodb data

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data enter image description here



source https://stackoverflow.com/questions/71273715/how-to-fix-keyerror-in-pymongo
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