從文件列表中讀取文件

Question

這個問題已經使用了很長時間了，但似乎找不到解決方案。我使用excelfiles函數來創建所有excelfiles的列表，包括在指定目錄中名稱中的「tst」。之後，我想用locate_vals-function從每個文檔中讀取特定的單元格，但似乎無法從文件列表中讀取文件。也許有一個非常簡單的解決方案，我只是看不到？我得到的錯誤信息在底部。

這是一個更重要的任務，我問了昨天的幫助（「Search through directories for specific Excel files and compare data from these files with inputvalues」）的一部分，但我似乎無法找到任何回答這個問題，我想這可能是最好給它它是自己的一個線程。糾正我，如果我錯了，我會刪除它:)

import xlrd 
import os, fnmatch 

#globals 

start_dir = 'C:/eclipse/TST-folder' 

def excelfiles(pattern): 
    file_list = [] 
    for root, dirs, files in os.walk(start_dir): 
     for filename in files: 
      if fnmatch.fnmatch(filename.lower(), pattern): 
       if filename.endswith(".xls") or filename.endswith(".xlsx") or filename.endswith(".xlsm"): 
        file_list.append(os.path.join(root, filename)) 
    return file_list 

file_list = excelfiles('*tst*')  # only accept docs hwom title includes tst 
for i in file_list: print i 


'''Location of each val from the excel spreadsheet''' 


def locate_vals(): 
    val_list = [] 
    for file in file_list: 
     wb = xlrd.open_workbook(os.path.join(start_dir, file)) 
     sheet = wb.sheet_by_index(0) 
     for vals in file: 
      weightvalue = file_list.sheet.cell(3, 3).value 
      lenghtvalue = sheet.cell(3, 2).value 
      speedval = sheet.cell(3, 4).value 

ERRORMESSAGE：

Traceback (most recent call last): 
    File "C:\Users\Håvard\Documents\Skulearbeid\UMB\4. Semester Vår\Inf120 Programmering og databehandling\Workspace\STT\tst_mainsheet.py", line 52, in <module> 
    print locate_vals() 
    File "C:\Users\Håvard\Documents\Skulearbeid\UMB\4. Semester Vår\Inf120 Programmering og databehandling\Workspace\STT\tst_mainsheet.py", line 48, in locate_vals 
    weightvalue = file_list.sheet.cell(3, 3).value 
AttributeError: 'list' object has no attribute 'sheet' 

Answer 1

問題表明你回溯的確是這樣的：

weightvalue = file_list.sheet.cell(3, 3).value 

應該是這樣的：

weightvalue = sheet.cell(3, 3).value 

但是，您的代碼中存在更多問題。我在評論中做了細微的修正和標記他們：

import xlrd 
import os, fnmatch 

start_dir = 'C:/eclipse/TST-folder' 

def excelfiles(pattern): 
    file_list = [] 
    for root, dirs, files in os.walk(start_dir): 
     for filename in files: 
      if fnmatch.fnmatch(filename.lower(), pattern): 
       if filename.endswith(".xls") or filename.endswith(".xlsx") or filename.endswith(".xlsm"): 
        file_list.append(os.path.join(root, filename)) 
    return file_list 

file_list = excelfiles('*tst*')  # only accept docs hwom title includes tst 
for i in file_list: print i 


'''Location of each val from the excel spreadsheet''' 


def locate_vals(): 
    val_dict = {} 
    for filename in file_list: 
     wb = xlrd.open_workbook(os.path.join(start_dir, filename)) 
     sheet = wb.sheet_by_index(0) 

     # problem 2: extract these values once per sheet 
     weightvalue = sheet.cell(3, 3).value 
     lengthvalue = sheet.cell(3, 2).value 
     speedvalue = sheet.cell(3, 4).value 

     # problem 3: store them in a dictionary, keyed on filename 
     val_dict[filename] = [weightvalue, lengthvalue, speedvalue] 

    # dictionary keyed on filename, with value a list of the extracted vals 
    return val_dict 

print locate_vals() 

Answer 2

錯誤說你需要的一切：

AttributeError: 'list' object has no attribute 'sheet'

file_list是名單文件名，列表在Python中沒有sheet屬性。

所以，你只需要更換：

weightvalue = file_list.sheet.cell(3, 3).value 

與

weightvalue = sheet.cell(3, 3).value 

Answer 3

變化：

weightvalue = file_list.sheet.cell(3, 3).value 

到：

weightvalue = sheet.cell(3, 3).value