Example of three ways to batch modify file names in python

# Batch change file name
#Batch change image file names
import os
import re
import sys
def renameall():
	fileList = (r"E:\py\python3.7\test\test17")		# Folders to be modified
	print("Before modification:"+str(fileList))		# Files contained in the output folder
	currentpath = ()		# Get the current working directory of the process
	(r"E:\py\python3.7\test\test17")		# Change the current working directory to the location of the folder to be modified
	num=1		# Name variables
	for fileName in fileList:		# Iterate over all files in a folder
		pat=".+\.(jpg|png|gif|py|txt)"		# Match filename regular expression
		pattern = (pat,fileName)		# Make a match
		(fileName,(str(num)+'.'+pattern[0]))		# File renaming
		num = num+1		#Change the number and continue to the next item
	print("---------------------------------------------------")
	(currentpath)		# Change back to the working directory before the program was run
	()		#Refresh
	print("Modified:"+str((r"E:\py\python3.7\test\test17")))		# Output the files contained in the modified folder
renameall()

import os

# Set the file path
path=r'E:\py\python3.7\test\test19\excel'
# Get all the files in the directory and put them in the list
fileList=(path)
The #get_key is the element used by the sotred function to compare, where the function is replaced by a lambda expression.
get_key = lambda i : int(('.')[0])
new_sort = sorted(fileList, key=get_key)
#print(fileList, '\n', new_sort)
n = 0

for i in fileList:
    # Set old filename (that's path + filename)
    oldname = path +  + new_sort[n]  # Add system separator

    # Set new file name
    newname = path +  + 'p' + str(n + 1)+'.csv'

    (oldname, newname)  # Rename a file using the rename method in the os module.

    print(oldname, '======>', newname)

    n += 1

import os
import re
import time
 
"""Selectively change the names of all files in a given directory"""
def ReFileName(dirPath,pattern):
    """
    :param dirPath: folder path
    :param pattern: regular pattern
    :return.
    """
    # Iterate over the files in the directory
    for file in (dirPath):
        # Determine if it's a file
        if ((dirPath, file)) == True:
            # Remove unwanted words by regular matching
            newName = (pattern, "", file)
            # Set new file name
            newFilename = (file, newName)
            # Rename
            ((dirPath, file), (dirPath, newFilename))
    print("The file name has been harmonized successfully.")
 
if __name__ == '__main__':
    timeStart = ()
    dirPath = r"E:\py\python3.7\test\test19\excel1"	
#   pattern = (r'\[{1}(.+)]\.')
    pattern = (r'\-class{1}(.+)3')
    ReFileName(dirPath,pattern)
    timeEnd = ()
    print("Program gone %d seconds."%(timeEnd-timeStart))

import os
import xlwings as wx

def listdir(path, list_name):  # Pass in the stored list
    for file in (path):
        # Exclude temporary documents
        if '~$' in file:
            continue

        # Obtain a list of photographs
        if ".jpg" in file:
            file_path = (path,file)
            list_name.append(file_path)

        # Get the excel file
        if ".xlsx" in file:
            index_file = (path,file)
            print("Data Source Files - >"+index_file)

    print(list_name)
    return index_file

def getinfo(new_name,index_file):          # Obtain the name and number of the person
    app = (visible=False, add_book=False) # Not opening baiexcel
    print("Reading personnel information-->"+index_file)
    wb = (index_file)
    sheet = [0]

    nrows    = sheet.used_range.last_cell.row       # Get the maximum number of rows
    ncolumns = sheet.used_range.last_cell.column    # Get the maximum number of columns

    # Find columns for names and numbers
    file_name = ""
    empl_name = ""
    empl_numb = ""
    ename_col = 0
    enumb_col = 0

    print("Maximum number of columns - >"+str(ncolumns))

    for col in range(1, ncolumns+1):
        if ((1,col)).value == "Name":
            ename_col = col
            print("Columns for names-->"+str(col))
        
        if ((1,col)).value == "School number.":
            enumb_col = col
            print("Columns for Employee Number-->"+str(col))

    # Take the name and number from the line
    for row in range(2,nrows+1):
        empl_name = str(((row,ename_col)).value)
        empl_numb = str(((row,enumb_col)).value)
        file_name = (empl_name + empl_numb).split('.')[0]       # New name
        print(file_name)
        new_name.append(file_name)

    print(new_name)

    ()
    ()

def change_name(file_path,new_name,list_name):
    # Processing photos one by one
    for filename in list_name:
        print("Old file name"+filename)
        old_name = ((filename)).split('.')[0]
        # Find out if this name is in the list of new names
        for nfile in new_name:
            if old_name in nfile:
                nfname = file_path++nfile+".jpg"
                print("New filename"+nfname)
                (filename,nfname)
                break
def main():
    file_path = input('Enter folder path:') # Folder location
    try:
        # Read all files in a folder
        List_files=[]
        index_file = listdir(file_path,List_files)

        # Read the employee name and employee number to form a new filename
        new_name=[]
        getinfo(new_name,index_file)

        # Change the name of the file
        change_name(file_path,new_name,List_files)

    except Exception as  e:
        # Print exception messages
        print(e)

if __name__ == '__main__':
    main()