python openpyxl cross-directory access to excel

OS Import 
Import Win32 win32com.client AS 
Import EasyGUI AS EG 
Import openpyxl 


fn_fuzhaibiao = 'C: /Users/laiwu/PycharmProjects/pythonProject1/1.xlsx' 
wb_fuzhaibiao = openpyxl.load_workbook (fn_fuzhaibiao) 

fuzhaibiao_allSheets = wb_fuzhaibiao.get_sheet_names () 

Print (fuzhaibiao_allSheets )