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x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up

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I'm parsing html and i'm doing:

x = root.find_class(...
y = root.find_class(..
z = root.find_class(..

all 3 are likely to fail so typically i'd have to stick it in a try. This is 
a huge pain for obvious reasons.

try:
 ....
except something:
 x = 'default_1'
(repeat 3 times)

Is there some other nice way to wrap this stuff up?
I can't do:
try:
 x=
 y=
 z=
except:

because here if x fails, y and z might have succeeded.

Pass the statement as a string to a try function? Any other way?

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x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up "Veek. M" <vek.m1234@gmail.com> - 2016-01-31 10:28 +0530
  Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Chris Angelico <rosuav@gmail.com> - 2016-01-31 16:23 +1100
    Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up "Veek. M" <vek.m1234@gmail.com> - 2016-01-31 11:59 +0530
      Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up "Veek. M" <vek.m1234@gmail.com> - 2016-01-31 12:01 +0530
      Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Steven D'Aprano <steve@pearwood.info> - 2016-01-31 20:21 +1100
        Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Chris Angelico <rosuav@gmail.com> - 2016-01-31 20:40 +1100
          Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Steven D'Aprano <steve@pearwood.info> - 2016-01-31 21:14 +1100
            Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Chris Angelico <rosuav@gmail.com> - 2016-02-01 00:27 +1100
      Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Peter Otten <__peter__@web.de> - 2016-01-31 11:40 +0100
      Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Larry Hudson <orgnut@yahoo.com> - 2016-01-31 13:27 -0800
  Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Steven D'Aprano <steve@pearwood.info> - 2016-01-31 18:22 +1100
  Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up "Veek. M" <vek.m1234@gmail.com> - 2016-01-31 20:55 +0530
  Re: x=something, y=somethinelse and z=crud all likely to fail - how do i wrap them up Vincent Davis <vincent@vincentdavis.net> - 2016-02-01 11:40 -0700

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