a few more precise imports in combinat

Author: fchapoton

src/sage/combinat/combinat.py

@@ -158,7 +158,7 @@
 from sage.arith.all import bernoulli, factorial
 from sage.rings.polynomial.polynomial_element import Polynomial
 from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
-from sage.libs.all import pari
+from sage.libs.pari import pari
 from sage.misc.prandom import randint
 from sage.misc.misc_c import prod
 from sage.misc.cachefunc import cached_function

src/sage/combinat/partition.py

@@ -283,7 +283,7 @@
 from copy import copy
 from itertools import accumulate
 
-from sage.libs.all import pari
+from sage.libs.pari import pari
 from sage.libs.flint.arith import number_of_partitions as flint_number_of_partitions
 
 from sage.arith.misc import multinomial

src/sage/combinat/root_system/weyl_group.py

@@ -242,7 +242,7 @@ def __init__(self, domain, prefix):
         # FinitelyGeneratedMatrixGroup_gap takes plain matrices as input
         gens_matrix = [self.morphism_matrix(self.domain().simple_reflection(i))
                        for i in self.index_set()]
-        from sage.libs.all import libgap
+        from sage.libs.gap.libgap import libgap
         libgap_group = libgap.Group(gens_matrix)
         degree = ZZ(self.domain().dimension())
         ring = self.domain().base_ring()
@@ -1027,7 +1027,6 @@ def __init__(self, cartan_type, prefix):
         self._index_set_inverse = {ii: i for i,ii in enumerate(cartan_type.index_set())}
         self._reflection_representation = None
         self._prefix = prefix
-        #from sage.libs.all import libgap
         Q = cartan_type.root_system().root_lattice()
         Phi = list(Q.positive_roots()) + [-x for x in Q.positive_roots()]
         p = [[Phi.index(x.weyl_action([i]))+1 for x in Phi]