The script is as follows:

#!/usr/local/python/bin/python
# -*-coding=utf8 -*-
import time
import os, sys

# Set how many days before deleting files
N = 3
#To delete a path
path = r'/tmp/wry/abc'

def deletefile(path):
    for eachfile in os.listdir(path):
        filename = os.path.join(path, eachfile)
        if os.path.isfile(filename):
            lastmodifytime = os.stat(filename).st_mtime
            # Set how long before deleting files
            endfiletime = time.time() - 3600 * 24 * N
            if endfiletime > lastmodifytime:
                #if filename[-4:] == ".log":
                os.remove(filename)
                print "Delete files %s Success" % filename
        # Call the current function recursively if it is a directory
        elif os.path.isdir(filename):  
            deletefile(filename)

if __name__ == '__main__':
    deletefile(path)

The operation effect is as follows:

To run python under windows, scripts are needed, mainly to modify the output characters, otherwise it is garbled:

#!/usr/local/python/bin/python
# -*-coding=utf8 -*-
import time
import os, sys

#Set how many days before deleting files
N = 3  
path = r"E:\0 work\02 Routine\linux Script\delete N Day script\test".decode('utf-8').encode('GB2312')

def deletefile(path):
    for eachfile in os.listdir(path):
        filename = os.path.join(path, eachfile)
        if os.path.isfile(filename):
            lastmodifytime = os.stat(filename).st_mtime
            #Set how long before deleting files
            endfiletime = time.time() - 3600 * 24 * N  
            if endfiletime > lastmodifytime:
                #if filename[-4:] == ".log":
                os.remove(filename)
                print "Delete files %s Success".decode('utf-8').encode('GB2312') % filename
        #Call the current function recursively if it is a directory
        elif os.path.isdir(filename):  
            deletefile(filename)

if __name__ == '__main__':
    deletefile(path)

The output is as follows

Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc  \ \
Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc  \ operation and maintenance information table.xlsx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc  \ new folder \ application architecture design V1.1.docx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc  \ create new folder \ start stop document.xlsx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc  \ start stop document.xlsx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script N days ago \ test \ abc \ application architecture design V1.1.docx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script before N days \ test \ abc \ operation and maintenance information table.xlsx succeeded
 Delete file E: e: \ 0  work \ 02 daily work \ linux script \ delete script before N days \ test \ abc \ operation and maintenance knowledge base start stop document.xlsx succeeded

Reference resources: python deletes files with the suffix. log 2 days ago
python delete files N days ago