python - 将 f.write 文件保存到与找到 askopenfilename 相同的目录

Question

我在 Python 中运行此脚本以查找文件中的特定行。 askopenfilename 将询问我要搜索的文件，f.write 会将结果保存到一个文件中。如何自动将此文件保存在我找到原始文件的同一位置？

from tkFileDialog import askopenfilename

filename = askopenfilename()

file = open(filename, "r")
for line in file:
    if "INF: Camera timeout" in line:
        with open("../timeouts.txt", "a") as f:
            f.write(line)
            f.close

同时 askopenfilename 在其他窗口后面打开，如何让它在顶部打开？

Answer 1

要从路径中提取目录，请使用 os.path.dirname(path) .

我会将您的代码重写为:

from os.path import join, dirname
from tkFileDialog import askopenfilename

infilename= askopenfilename()
outfilename = join(dirname(infilename), 'timeouts.txt')
with open(infilename, 'r') as f_in, open(outfilename, 'a') as f_out: 
    fout.writelines(line for line in f_in if "INF: Camera timeout" in line)

关于您的第二个问题，请参阅 How to give Tkinter file dialog focus .

注意:以上示例部分基于 Alex Thornton 的 deleted answer .