PyChecker must execute script?

[Afanasiy]

I was hoping to find a typo/syntax checking solution so a
long running script did not fail when it encountered them.

I spent the time to get the suggested PyChecker utility installed
and have run it on one of the above-mentioned script files. Shortly
thereafter, I killed it because it was just executing my script...

Is this simply how PyChecker works? That seems a little odd to me.