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Subject: Re: xml.etree.ElementTree if element does not exist?
From: Stefan Holdermans <stefan@vectorfabrics.com>
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Date: Mon, 29 Apr 2013 13:22:31 +0200
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Xref: csiph.com comp.lang.python:44494

Ombongi,

> however, if i pass xml data that DOES NOT contain sepid element, i get =
an error:
>=20
> Traceback (most recent call last):
>   File "/usr/local/bin/receive.py", line 21, in <module>
>     sepid =3D =
content.find(".//{http://www.huawei.com.cn/schema/common/v2_1}sepid").text=

> AttributeError: 'NoneType' object has no attribute 'text'
>=20
>=20
> some messages i receive will have the sepid parameter, other will not =
have this parameter. How can i cater for this? kinda like an if .. else =
implementation for xml.etree.ElementTree  ?

What about simply testing whether the value returned by find is None? =
For example:

  $ cat test.py
  from xml.etree import ElementTree

  myTree =3D ElementTree.fromstring('<test />')
  myElement =3D myTree.find('orange')

  if myElement is None:
      print 'tree does not contain a child element "orange"'
  else:
      print myElement.text
   =20

  $ python test.py
  tree does not contain a child element "orange"

HTH,

  Stefan=