How to find new random number if it's not in the list

def generate():
    global winningRows
    filename = enterFile()
 
    noOfWinners = 5
    winningNumbers = []
    while len(winningNumbers) < noOfWinners:
        luckyNumber = random.randint(1, totalEntries)
        if luckyNumber not in winningNumbers:
            winningNumbers.append(luckyNumber)
 
    with open(filename, newline='\n') as entriesCSV:
        entriesDict = csv.DictReader(entriesCSV,dialect="excel")
        allRows = [row for row in entriesDict]
        winningRows = [row for row in allRows if int(row["#"]) in winningNumbers]
        nonWinningRows = [row for row in allRows if int(row["#"]) not in winningNumbers]
        for row in winningRows:
            winnerName = row["Name"]
            winnerID = row["ID"]
            winnerEmail = row["Email"]
            print(f"The winner is {winnerName}, ID {winnerID}, email {winnerEmail}")
 
    with open(filename, "w", newline='\n') as entriesCSV:
        writer = csv.DictWriter(entriesCSV, fieldnames=["#", "Name", "ID", "Email"])
        writer.writeheader()
        writer.writerows(nonWinningRows)