import win32com.client
from pathlib import Path

excel = win32com.client.Dispatch("Excel.Application")
excel.DisplayAlerts = False
#excel.Visible = True

filename = Path("Excel\\Dash_LH_Wien.xls")
path = str(filename.parent.resolve())
print(filename.resolve())

wb = excel.Workbooks.Open(filename.resolve())

try:
    for source in wb.LinkSources(1):
        print(" --> " + source)
        if Path(source).exists():
            excel.Workbooks.Open(source)
        else:
            print("     !! does not exist !!")
except TypeError:
    print(" --> " + "no LinkSources")

wb.RefreshAll()
wb.Save()
wb.Close(True)
excel.Application.Quit()