从 csv 中选择特定列并更新另一个 csv

Question

我有一个目录，其中包含许多带有 .csv 文件的文件夹，我需要从所有 .csv 中选择一个特定的列并附加到另一个 result.csv

Answer 1

You should read all csv files one by one with os library and read/keep the specific column that you want, like this

csv_file = pd.read_csv("csv_name_from_os.csv") 
column_val_list = csv_file.specific_column_name._ndarray_values

then you can concat multiple columns with

result = pd.concat([result, dat2], axis=1) 

at the end you should save the frame as csv file.