Python: existing file not found (IOError: [Errno 2]) when using os.walk

Question

我设置了以下目录：

+---main
|   |   
|   +---sub1
|   |       file1.xlsx
|   | 
|   +---sub2
|   |       file2.xlsx
|   |
|   \---sub3
|           file3.xlsx

我想访问每个文件并计算其 A1:A10 个单元格的平均值，但是当 file1.xlsx 存在时，我收到此错误：

IOError: [Errno 2] No such file or directory: 'file1.xlsx'

我现在的代码（它被设计为迭代许多 "main" 目录）：

import os
from openpyxl import load_workbook

directoryPath=r'C:\Users\MyName\Desktop\MainFolder'
os.chdir(directoryPath)
folder_list=os.listdir(directoryPath)
for folders, sub_folders, file in os.walk(directoryPath):
    for name in file:
        if name.endswith(".xlsx"):
            filename=os.path.basename(name)
            wb=load_workbook(filename)
            cell_range = wb['A1':'A10']

            #computing the mean value

错误指向wb=load_workbook(filename)。为什么我会得到它以及如何解决它？

Answer 1

请检查documentation for os.walk。它指出：

To get a full path (which begins with top) to a file or directory in dirpath, do os.path.join(dirpath, name).

这意味着正确的代码应该是这样的：

for folder, sub_folders, files in os.walk(directoryPath):
    for name in files:
        if name.endswith(".xlsx"):
            filename = os.path.join(folder, name)
            wb = load_workbook(filename)
            # ...

Python: existing file not found (IOError: [Errno 2]) when using os.walk

Python: existing file not found (IOError: [Errno 2]) when using os.walk

python

directory

filenames

subdirectory