Question

我有一个文件夹，其中存储了我的python程序生成的文本文件（CSV格式的数据）。我想以最新修改时间将3个文件（文件名以LogFile_Date开头）读入Pandas Dataframe。我正在使用Windows操作系统和Python 3。

Answer 1

为此提供了帮助：How do you get a directory listing sorted by creation date in python?。我想这就是你想要的：

import os
import pandas as pd

search_dir = r"C:\mydir"
os.chdir(search_dir)
files = filter(os.path.isfile, os.listdir(search_dir))
files = [os.path.join(search_dir, f) for f in files] # add path to each file
files.sort(key=lambda x: os.path.getmtime(x), reverse=True)
dfs=[]
for i in range(3):
    dfs.append(pd.read_csv(files[i].split('\\')[-1],
                           delimiter=','))

Answer 2

import os
import pandas as pd

search_dir = r"C:\Users\123\Documents\Folder"
os.chdir(search_dir)
files = filter(os.path.isfile, os.listdir(search_dir))
files = [os.path.join(search_dir, f) for f in files] # add path to each file
files.sort(key=lambda x: os.path.getmtime(x), reverse=True)
dfs = pd.DataFrame()
for i in range(2):
    dfs = dfs.append(pd.read_csv(files[i].split('\\')[-1],delimiter=',', header=None, usecols=[0,1,2], names=['colA', 'colB', 'colC']))

dfs = dfs.reset_index(drop=True)
print(dfs)

以最新的修改时间将3个文件读入Pandas Dataframe

2 个答案: