Illegal variable name/number when binding dictionary

I am currently getting a couple errors with my insert using cx_Oracle for python 3.6

ORA-01036: illegal variable name/number

and

ORA-01745: invalid host/bind variable name

Here is my code:

    def load_wp_sql(self, wp_dict):
        self.db.begin()
        cursor = self.db.cursor()
        sql = """INSERT INTO work_package_work_table
                 (CONTROL_ACCOUNT, CONTROL_MANAGER, WP_MANAGER,
                  TITLE, WORK_STATEMENT, TYPE,
                  RISK_MITIGATION_SCOPE)
                 VALUES
                 (:control_account, :cam, :wp_manager,
                  :wp_title, :statement_of_work,
                  :wp_type, risk_mitigation_scope)
              """ 
        try:
            for wp in wp_dict:
                cursor.prepare(sql)
                cursor.execute(None, wp)
            self.db.commit()
        except cx_Oracle.DatabaseError as e:
            self.db.rollback()

This is the dictionary I am trying to bind, it is passed into the function as a generator object.

{
  'cam': 'CA Manager', 
  'control_account': 'W80.11.11.01.LL', 
  'risk_mitigation_scope': 'No', 
  'statement_of_work': 'For setup and maintainance of of the W80 EVMS Tools', 
  'wp_manager': 'cohagan1', 
  'wp_title': 'EVMS Tools', 
  'wp_type': 'Discrete'
}

I've looked a quite a few stackoverflow posts: Python cx_Oracle bind variables

DatabaseError: ORA-01036: illegal variable name/number

As well as their documentation:https://www.oracle.com/technetwork/articles/dsl/prez-python-queries-101587.html

I'm pretty sure I am just missing something simple but can't seem to find it.