from Crypto.PublicKey import RSA

def importe(private,public):
    with open(private,'r') as f:
	    priv = f.read()
	    f.close()

    with open(public,'r') as f:
	    pub = f.read()
	    f.close()

    return (RSA.importKey(priv) , RSA.importKey(pub))
    #return (priv,pub) pour retourner clés en clair

r = importe('private.txt','public.txt')
print(r[0].exportKey('PEM'),'\n',r[1].exportKey('PEM'))