# 常用python 语法

**Published by:** [KeepLearning](https://paragraph.com/@keeplearning-2/)
**Published on:** 2024-01-14
**URL:** https://paragraph.com/@keeplearning-2/python-3

## Content

1，注意中括号 df = pd.read_csv(path, parse_dates=['candle_begin_time']) 2，时间修改 df['candle_begin_time'] = df['candle_begin_time'] - pd.Timedelta(hours=8) 3，删掉某一列 df.drop('symbol_type', axis=1, inplace=True) 4，某一列的replace，注意需要加上str df['symbol'] = df['symbol'].str.replace('USDT', '-USDT') 5，比较两个文件夹 files1 = set(os.listdir(xingbuxing_spot_path)) files2 = set(os.listdir(menglong_spot_path)) unique_to_folder1 = files1 - files2 unique_to_folder2 = files2 - files1 6，文件夹下的所有文件，也可以统计个数，list(files1) files1 = os.listdir(xingbuxing_spot_path) 7，最左下角数值 df.iloc[-1, 0]

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