search for specific file [RESOLVED]

[deranged]

I know i posted earlier about searching. but that was for searching multi files.

i need a simple command or function (in module would be nice) that would check to see if a file exists or not and return a value depending on whether or not it exists. It would also be helpful to be as simple as possible. Only one directory should be checked, and no subdirectories needed .

Any help would be well appreciated. Thanks.