problem using subprocess.call

[Alex Kachanov]

>> 
>> dir=os.path.join(os.path.expanduser("~/domains/domain.com/html"),'test')
>>    subprocess.call(['find',dir+" -name '*.zip' -execdir unzip {} \;"])
>
>    subprocess.call(["find", dir, "-name", "*.zip", "-execdir", "unzip", 
> "{}", ";"])

Ok, thanks, it works.
But what's the difference? Why I can't pass all parameters as one string?