Keep-trying-until-it-works

Due to lack of gotos, this is the shortest way I can come up with to tell python to keep doing something until it actually works (in my case, loading a webpage) is this:

tempvar = 1
while tempvar == 1:
    try:
        <stuff that will either work or cause an exception>
        tempvar = 0
    except:
        pass

in c++ i could just

lbl: try{stuff} catch {goto lbl;}

better way?

"Don't use exceptions for expected conditions" always sounds a lot like "we didn't really design for exceptions so if you throw one you'll probably crash the program / leak memory / corrupt data, so only do it if you pretty much have to crash anyway".  Is there any justification for this ‘principle’?