根据 excel sheet-PYTHON 中可散列的文件名重命名目录中的文件

Question

我正在创建一个 python 脚本来重命名所有文件。

我将文件保存为这些数字，现在打开它并命名它们太麻烦了，所以我想为它创建一个脚本。 我有一张 excel 表，它代表文件的名称 w.r.t 它的编号。

我必须先清洁 excel。 在这里，由于重复，excel 表中不存在某些数字，并且我们不知道目录中重复的 state，因此不会触及这些数字。

我认为散列会在这里帮助我，但我面临一些错误。 请帮帮我。 这是我的代码

import pandas as pd
data=pd.read_excel(r'C:\Users\Kirti\Downloads\Book2.xlsx')
data=data[:-1]
data['Number']=data['Number'].astype(int)
hs=data.set_index('Number')['Name'].to_dict()

count=1
import os 
os.chdir(r'C:\Users\Kirti\Documents\Notnumbered')
for f in os.listdir(r'C:\Users\Kirti\Documents\Notnumbered'):
    try:
        file_name='{}.{}'.format(count,'pdf')
        new_name = '{}.{}'.format(hs[count], 'pdf')
        print(file_name,new_name)
        os.rename(f, new_name)
    except KeyError: 
        count+=1
        continue
    count+=1

错误：

1.pdf ITILST0701 Transition Planning and Support Policy.pdf     # If we see here, the counter didn't 
                                                              #increase and name of the file
                                                              # stayed the first name only. 
---------------------------------------------------------------------------
FileExistsError                           Traceback (most recent call last)
<ipython-input-6-5f40d4caed55> in <module>
      7         new_name = '{}.{}'.format(hs[count], 'pdf')
      8         print(file_name,new_name)
----> 9         os.rename(f, new_name)
     10     except KeyError:
     11         count+=1

FileExistsError: [WinError 183] Cannot create a file when that file already exists: '127.pdf' -> 'ITILST0701 Transition Planning and Support Policy.pdf'

为什么计数器不增加？ 如果编译了 127 之前的文件，那么应该已经打印出来了。 提前致谢

Answer 1

错误FileExistsError显示具有此名称的文件已存在。

所以你应该抓住这个错误来继续代码

    except FileExistsError: 

喜欢

import os   # PEP8: all imports at the beginnig

count = 1   # PEP8: spaces around `=`

os.chdir(r'C:\Users\Kirti\Documents\Notnumbered')

for f in os.listdir():  # if you already do `chdir` then you don't have to use full path
    try:
        file_name = '{}.pdf'.format(count)
        new_name = '{}.pdf'.format(hs[count])

        print(file_name, new_name)  # PEP8: space after `,`

        os.rename(f, new_name)
    except KeyError as ex: 
        print('KeyError:', ex)  # it is good to display message with error - to see if there was some problem
    except FileExistsError as ex: 
        print('FileExistsError:', ex)  # it is good to display message with error - to see if there was some problem

    count += 1

或者您应该检查文件是否已经存在并仅在不存在时重命名

    if not os.path.exists(new_name):
        os.rename(f, new_name)

喜欢：

import os   # PEP8: all imports at the beginnig

count = 1   # PEP8: spaces around `=`

os.chdir(r'C:\Users\Kirti\Documents\Notnumbered')

for f in os.listdir():  # if you already do `chdir` then you don't have to use full path
    try:
        file_name = '{}.pdf'.format(count)
        new_name = '{}.pdf'.format(hs[count])

        print(file_name, new_name)  # PEP8: space after `,`

        if not os.path.exists(new_name):
            os.rename(f, new_name)
        else:
            print('File already exists')
    except KeyError as ex: 
        print('KeyError:', ex)  # it is good to display message with error - to see if there was some problem

    count += 1

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PEP 8 -- Python 代码的样式指南