Help Need In Coding

[Alec D. Cheah]

i'm using Python 2.1

How do verified from input the variable entered is a file or a path
and how do you check whether it exist or not??

now let say ... i just specified input a value "xxx.java" i just want
to check whether it exist in a current directory or subdirectory of
current directory depending on how many directory level you have. if
not a file then check whether it a directory????

In this case it will do a searching base on the input value.

Help...

Newbie on Python....