Teach you how to use Python to compress batch files

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I. Introduction

Hi everyone, this is Cui Yanfei. When receiving help from the project, I need to compress files in thousands of folders, and delete the source files, only keep the compressed files after compression. The amount of data is large, and manual completion is time-consuming and labor-intensive, and it is more appropriate to use Python for processing. Up.

2. Project goals

Compress the contents of folders in batches to meet customer requirements.

3. Project preparation

Software: PyCharm

Required libraries: os, shutil, zipfile

Four, project analysis

1) How to read the source file?

Use the OS library to get the folder name list, and use the for loop to easily get the source file to be compressed.

2) How to perform compression processing?

Use zipfile.ZipFile() in the zipfile library to compress the acquired files.

3) How to delete source files?

First use the remove() of the os library to delete files, and then use the rmtree() of the shutil library to delete empty folders.

Five, project realization

1. The first step is to import the three libraries needed

import os as os


import shutil


import zipfile

2. The second step defines the delete file function and the compressed file function

def del_(rootdir):
    filelist = []
    filelist = os.listdir(rootdir)  # 列出该目录下的所有文件名
    for f in filelist:
        filepath = os.path.join(rootdir, f)  # 将文件名映射成绝对路劲
        if os.path.isfile(filepath):  # 判断该文件是否为文件或者文件夹
            os.remove(filepath)  # 若为文件，则直接删除
        elif os.path.isdir(filepath):
            shutil.rmtree(filepath, True)  # 若为文件夹，则删除该文件夹及文件夹内所有文件
    shutil.rmtree(rootdir, True)
def zipDir(dirpath,outFullName):
    zip = zipfile.ZipFile(outFullName,"w",zipfile.ZIP_DEFLATED)
    for path,dirnames,filenames in os.walk(dirpath):
        # 去掉目标跟路径，只对目标文件夹下边的文件及文件夹进行压缩
        fpath = path.replace(dirpath,'')


        for filename in filenames:
            zip.write(os.path.join(path,filename),os.path.join(fpath,filename))
    zip.close()

3. The third step is to create the main function

def main():
    path_end = 'D:/a/h/'
    date= os.listdir(path_end)
    # 获取目标文件夹所有文件夹名列表
    for f in date:
        ljbc='D:/a/h/'+f+'/'+'查询信息.zip'
        ljbc2 = 'D:/a/h/' + f + '/' + '下发修改.zip'
        #以上两行是创建压缩后的文件名
        ljcx='D:/a/h/'+f+'/查询信息'
        ljxf = 'D:/a/h/' + f + '/下发修改'
        #以上两行是要压缩的源文件
        zipDir(ljcx,ljbc)
        zipDir(ljxf, ljbc2)
        del_(ljcx)
        del_(ljxf)
        
if __name__ == '__main__':
    main()

Six, effect display

1. The processed folder:

2. Compressed files in the processed folder:

Seven, summary

This article introduces how to use Python to perform batch compression processing on a large number of files. In fact, it can be achieved with a few lines of statements. After the program is written, it can complete tasks that one person cannot complete in one day in less than one minute. Life is short, use Python!

Finally, those who need the project code of this article, please reply to the keyword " file compression " in the background of the official account to obtain it. If you encounter any problems during the operation, please feel free to leave a message or add a friend to the editor. The editor will help if you see it. Everyone solve the bug!

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