Relation between random module's randomness and a supplied seed

So I am trying to get a cryptographically strong random number generator... The thing is, for certain reasons, I would still like to be able to assign a random seed to the generator (it can be a relatively large seed if necessary though).

So in light of this... If one uses a cryptographically strong random generator (like pycrypto's random module, or random.SystemRandom) to generate a random seed for the regular python random module, will the random module have sufficient randomness and entropy to be considered cryptographically strong?