如果文件名已经存在，Python 将文件复制到新目录并重命名

问题描述

我已经阅读了 这个帖子 但是当我将它实现到我的代码中时，它只适用于几次迭代.

I've already read this thread but when I implement it into my code it only works for a few iterations.

我正在使用 python 遍历一个目录(我们称之为移动目录)，主要将 pdf 文件(匹配唯一 ID)复制到另一个目录(基本目录)到匹配文件夹(具有相应的唯一 ID).我开始使用 shutil.copy 但如果有重复，它会覆盖现有文件.

I'm using python to iterate through a directory (lets call it move directory) to copy mainly pdf files (matching a unique ID) to another directory (base directory) to the matching folder (with the corresponding unique ID). I started using shutil.copy but if there are duplicates it overwrites the existing file.

我希望能够搜索相应的文件夹以查看该文件是否已存在，如果出现多个，则对其进行迭代命名.

I'd like to be able to search the corresponding folder to see if the file already exists, and iteratively name it if more than one occurs.

例如

• 将文件 1234.pdf 复制到基本目录 1234 的文件夹中.
• 如果存在 1234.pdf，则将其命名为 1234_1.pdf，
• 如果另一个 pdf 被复制为 1234.pdf，那么它将是 1234_2.pdf.

这是我的代码:

import arcpy
import os
import re
import sys
import traceback
import collections
import shutil

movdir = r"C:Scans"
basedir = r"C:Links"

try:
    #Walk through all files in the directory that contains the files to copy
    for root, dirs, files in os.walk(movdir):
        for filename in files:
            #find the name location and name of files
            path = os.path.join(root, filename)
            print path
            #file name and extension
            ARN, extension = os.path.splitext(filename)
            print ARN

            #Location of the corresponding folder in the new directory
            link = os.path.join(basedir,ARN)

            # if the folder already exists in new directory
            if os.path.exists(link):

                #this is the file location in the new directory
                file = os.path.join(basedir, ARN, ARN)
                linkfn = os.path.join(basedir, ARN, filename)

                if os.path.exists(linkfn):
                    i = 0
                    #if this file already exists in the folder
                    print "Path exists already"
                    while os.path.exists(file + "_" + str(i) + extension):
                        i+=1
                    print "Already 2x exists..."
                    print "Renaming"
                    shutil.copy(path, file + "_" + str(i) + extension)
                else:

                    shutil.copy(path, link)
                    print ARN + " " +  "Copied"
            else:
                print ARN + " " + "Not Found"

推荐答案

有时重新开始会更容易......如果有任何错字，我很抱歉，我没有时间彻底测试它.

Sometimes it is just easier to start over... I apologize if there is any typo, I haven't had the time to test it thoroughly.

movdir = r"C:Scans"
basedir = r"C:Links"
# Walk through all files in the directory that contains the files to copy
for root, dirs, files in os.walk(movdir):
    for filename in files:
        # I use absolute path, case you want to move several dirs.
        old_name = os.path.join( os.path.abspath(root), filename )

        # Separate base from extension
        base, extension = os.path.splitext(filename)

        # Initial new name
        new_name = os.path.join(basedir, base, filename)

        # If folder basedir/base does not exist... You don't want to create it?
        if not os.path.exists(os.path.join(basedir, base)):
            print os.path.join(basedir,base), "not found"
            continue    # Next filename
        elif not os.path.exists(new_name):  # folder exists, file does not
            shutil.copy(old_name, new_name)
        else:  # folder exists, file exists as well
            ii = 1
            while True:
                new_name = os.path.join(basedir,base, base + "_" + str(ii) + extension)
                if not os.path.exists(new_name):
                   shutil.copy(old_name, new_name)
                   print "Copied", old_name, "as", new_name
                   break
                ii += 1

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