Re: Good python equivalent to C goto

[Matthew Fitzgibbons]

Kurien Mathew wrote:
Hello,
Any suggestions on a good python equivalent for the following C code:

while (loopCondition)
{
    if (condition1)
        goto next;
    if (condition2)
        goto next;
    if (condition3)
        goto next;
    stmt1;
    stmt2;
next:
    stmt3;
    stmt4;
 }



Thanks
Kurien
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I would not be too happy if I saw C code like that in my repository. 
This is equivalent:

while (loopCondition) {
    if (!(condition1 || condition2 || condition3)) {
        stmt1;
        stmt2;
    }
    stmt3;
    stmt4;
}


In Python:

while (loopCondition):
    if not (condition1 or condition2 or condition3):
        stmt1
        stmt2
    stmt3
    stmt4

If stmt3 and stmt4 are error cleanup code, I would use try/finally.

while loopCondition:
    try:
        if condition1:
            raise Error1()
        if condition2:
            raise Error2()
        if condition3:
            raise Error3()
        stmt1
        stmt2
    finally:
        stmt3
        stmt4

This will also bail out of the loop on and exception and the exception 
will get to the next level. If you don't want that to happen, put an 
appropriate except block before the finally.

-Matt
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