type(obj) = <class 'sage.rings.number_field.morphism.CyclotomicFieldHomomorphism_im_gens'>
version = 3.4.rc1
obj =
'Ring endomorphism of Cyclotomic Field of order 7 and degree 6
  Defn: zeta7 |--> -zeta7^5 - zeta7^4 - zeta7^3 - zeta7^2 - zeta7 - 1'
