def get_installed_pypackages():
    return {p.project_name.lower(): p for p in pkg_resources.working_set}
def encrypt(self, raw):
        raw = self._pad(raw)
        iv = Random.new().read(AES.block_size)
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return iv + cipher.encrypt(raw)