I have been coding in Python for a while but when I look at the 2 basic example codes, they are either missing "if __name__ == "__main__" but they run fine for backtest. Can someone please point me to some other basic codes implemented here in python so I can learn from it. At this point I just want to go long 100 share of SPY and short 100 share of DIA and backtest it to understand the python implementation.