Is scrypt a hashing function, encryption, or PBKDF? I have installed a python implementation of scrypt and noticed it has several functions, both an encrypt and hash function. Yet Wikipedia lists it as being used for PBKDF instead of PBKDF2. Is scrypt a hashing function for PBKDF2 or is it on its own an alternative?
Scrypt is most certainly a password-based-key-derivation-function.  So is PBKDF2, although it can be confusing since PBKDF2 is an eponym.  To add to the confusion, Scrypt uses PBKDF2 internally (which may be the hashing function you refer to), as well as the Salsa20/8 Core function (which may be the encryption function you refer to).  Further reading here.