查找一行中的行数- Python openpyxl

import openpyxl

def find_row_number(filename, sheetname, target_value):
    workbook = openpyxl.load_workbook(filename)
    worksheet = workbook[sheetname]
    
    target_row = None
    for row in worksheet.iter_rows():
        if row[0].value == target_value:
            target_row = row
            break
    
    if target_row is not None:
        row_number = target_row[0].row
        return row_number
    else:
        return None

filename = 'example.xlsx'
sheetname = 'Sheet1'
target_value = 'example'

row_number = find_row_number(filename, sheetname, target_value)
if row_number is not None:
    print("The row number of '{}' is {}".format(target_value, row_number))
else:
    print("The target value '{}' is not found in the sheet '{}'".format(target_value, sheetname))