selenium_Utils.py 文件源码

def evaluate_argument_value(xpath_or_tagname, datafile):
    """This function takes checks if the given xpath_or_tagname exists in the
    datafile and returns its value. Else returns None."""
    tree = ET.parse(datafile)
    root = tree.getroot()
    if xpath_or_tagname.startswith(root.tag + "/"):
        xpath_or_tagname = xpath_or_tagname[len(root.tag + "/"):]
        try:
            xpath_or_tagname = root.find(xpath_or_tagname).text
        except Exception:
            print_error("Invalid xpath: {0}".format(root.tag + "/" + xpath_or_tagname))
            xpath_or_tagname = None
    else:
        print_error("Invalid xpath: {0}".format(xpath_or_tagname))
        xpath_or_tagname = None
    return xpath_or_tagname