python
    import os
    def check_path(path):
        return os.path.isfile(path)

tag PATH
    check check_path(value)
    check os.path.isfile(value)

2012-02-29 KFC
    ; PATH: test/baseline/feat-import_py.test
    Expenses:Food                $20
    Assets:Cash

2012-02-29 KFC
    ; PATH: test/baseline/feat-import_noexist.test
    Expenses:Food                $20
    Assets:Cash

test reg
12-Feb-29 KFC                   Expenses:Food                   $20          $20
                                Assets:Cash                    $-20            0
12-Feb-29 KFC                   Expenses:Food                   $20          $20
                                Assets:Cash                    $-20            0
__ERROR__
Warning: "$sourcepath/test/baseline/dir-python_py.test", line 18: Metadata check failed for (PATH: test/baseline/feat-import_noexist.test): check_path(value)
Warning: "$sourcepath/test/baseline/dir-python_py.test", line 18: Metadata check failed for (PATH: test/baseline/feat-import_noexist.test): ((os.path).isfile(value))
end test