sage: d = ModularSymbols(Gamma0(43), 2, sign=1).cuspidal_subspace().new_subspace().decomposition()
sage: d

[
Modular Symbols subspace of dimension 1 of Modular Symbols space of dimension 4 for Gamma_0(43) of weight 2 with sign 1 over Rational Field,
Modular Symbols subspace of dimension 2 of Modular Symbols space of dimension 4 for Gamma_0(43) of weight 2 with sign 1 over Rational Field
]
sage: for a in d: print a.q_eigenform(10)
....:
q - 2*q^2 - 2*q^3 + 2*q^4 - 4*q^5 + 4*q^6 + q^9 + O(q^10)
q + alpha*q^2 + -alpha*q^3 + (-alpha + 2)*q^5 + -2*q^6 + (alpha - 2)*q^7 + -2*alpha*q^8 + -q^9 + O(q^10)