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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def encrypt_password(self, raw_password):
 """ Encrypts a plaintext password using the stored passlib password context """

        PraetorianError.require_condition(
            self.pwd_ctx is not None,
            "Praetorian must be initialized before this method is available",
        )
        return self.pwd_ctx.encrypt(raw_password, scheme=self.hash_scheme)