lxml find element by name, but use variable in search

问题

I have a problem with the find function in lXML. But i think this is more a generic question how to tell that i want to check against the value, not the object reference.

So here is the code that works:

step = xml_obj.find('.//step/name[text()="Design"]').getparent()

If i try to replace the string with an object, the result is always None.

stepn = 'Design'
step = xml_obj.find('.//step/name[text()=stepn]').getparent()

'NoneType' object has no attribute 'getparent'

回答1:

stepn = 'Design'
step = xml_obj.find('.//step/name[text()={}]'.format(stepn)).getparent()

when you use ' ', it's a string , any element in string will be treated as a string, not a variable.

Use format to add variable to string

来源：https://stackoverflow.com/questions/41985178/lxml-find-element-by-name-but-use-variable-in-search