python初学者请问大神们stock_code_list.append(f.split('.csv

前面是一个for循环，for f in files：

files的内容是：

print(files)

['sh600000.csv', 'sh600001.csv', 'sh600002.csv', 'sh600003.csv', 'sh600004.csv', 'sh600005.csv', 'sh600006.csv', 'sh600007.csv', 'sh600008.csv', 'sh600009.csv', 'sh600010.csv', 'sh600011.csv', 'sh600012.csv', 'sh600015.csv', 'sh600016.csv', 'sh600017.csv', 'sh600018.csv', 'sh600019.csv', 'sh600020.csv', 'sh600021.csv', 'sh600022.csv', 'sh600023.csv', 'sh600026.csv', 'sh600027.csv', 'sh600028.csv', 'sh600029.csv', 'sh600030.csv', 'sh600031.csv', 'sh600033.csv', 'sh600035.csv']