os.path.join and sqlite not playing well together

Question

Python 2.7 (Windows)

    for root, dirs, files in os.walk(self.DiskLocation, topdown=False):
        for name in files:
            path = os.path.join(root, name)
            print path #check it's what we think it is
            self.cur.execute("SELECT * from myTable WHERE Path = ?", (path))

Yields this...

sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and there are 54 supplied.

I was really confused as to what the 54 supplied bindings are, until I realised that my path variable is 54 characters. But why is sqlite interpreting it as a long list of characters rather than a string, and how do I stop it doing this?

Answer 1

The second argument to execute is a sequence.

You wrote (path), but those are just regular parentheses, so that's equivalent to path. Strings are sequences of their characters, thus Python is dutifully passing along all 54 characters in the sequence you provided.

What you want is (path,), which is a tuple of 1 element.

Tuples are created with commas, not parentheses.

If this is confusing you could just use [path]; a list is fine here too. :)