cython-lint : removed many unused imports in rings/

Author: fchapoton

src/sage/rings/complex_arb.pyx

@@ -153,7 +153,6 @@ import sage.categories.fields
 cimport sage.rings.abc
 cimport sage.rings.rational
 
-from cpython.float cimport PyFloat_AS_DOUBLE
 from cpython.int cimport PyInt_AS_LONG
 from cpython.object cimport Py_LT, Py_LE, Py_EQ, Py_NE, Py_GT, Py_GE
 from cpython.complex cimport PyComplex_FromDoubles
@@ -169,13 +168,13 @@ from sage.libs.arb.acb_hypgeom cimport *
 from sage.libs.arb.acb_elliptic cimport *
 from sage.libs.arb.acb_modular cimport *
 from sage.libs.arb.acb_poly cimport *
-from sage.libs.arb.arf cimport arf_init, arf_get_d, arf_get_mpfr, arf_set_mpfr, arf_clear, arf_set_mag, arf_set, arf_is_nan
-from sage.libs.arb.mag cimport (mag_init, mag_clear, mag_add, mag_set_d,
-        MAG_BITS, mag_is_inf, mag_is_finite, mag_zero, mag_set_ui_2exp_si,
+from sage.libs.arb.arf cimport arf_init, arf_get_d, arf_get_mpfr, arf_clear, arf_set, arf_is_nan
+from sage.libs.arb.mag cimport (mag_init, mag_clear, mag_set_d,
+        MAG_BITS, mag_zero, mag_set_ui_2exp_si,
         mag_mul_2exp_si)
-from sage.libs.flint.fmpz cimport fmpz_t, fmpz_init, fmpz_get_mpz, fmpz_set_mpz, fmpz_clear, fmpz_abs
+from sage.libs.flint.fmpz cimport fmpz_t, fmpz_init, fmpz_get_mpz, fmpz_set_mpz, fmpz_clear
 from sage.libs.flint.fmpq cimport fmpq_t, fmpq_init, fmpq_set_mpq, fmpq_clear
-from sage.libs.gmp.mpz cimport mpz_fits_ulong_p, mpz_fits_slong_p, mpz_get_ui, mpz_get_si, mpz_sgn
+from sage.libs.gmp.mpz cimport mpz_fits_slong_p, mpz_get_si
 from sage.libs.gsl.complex cimport gsl_complex_rect
 from sage.rings.real_double cimport RealDoubleElement
 from sage.rings.complex_double cimport ComplexDoubleElement
@@ -186,13 +185,12 @@ from sage.rings.real_arb import RealBallField
 from sage.rings.real_mpfi cimport RealIntervalField_class
 from sage.rings.real_mpfr cimport RealField_class, RealField, RealNumber
 from sage.rings.ring import Field
-from sage.structure.element cimport Element, ModuleElement
+from sage.structure.element cimport Element
 from sage.structure.unique_representation import UniqueRepresentation
 from sage.arith.long cimport is_small_python_int
 
 from sage.misc.lazy_string import lazy_string
 from sage.misc.superseded import deprecated_function_alias
-from sage.rings.complex_mpfr import ComplexField
 from sage.rings.complex_interval_field import ComplexIntervalField, ComplexIntervalField_class
 from sage.rings.integer_ring import ZZ
 

src/sage/rings/complex_double.pyx

@@ -68,7 +68,6 @@ AUTHORS:
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-import operator
 from cpython.object cimport Py_NE
 
 from sage.misc.randstate cimport randstate, current_randstate
@@ -83,7 +82,7 @@ import sage.rings.abc
 cimport sage.rings.ring
 cimport sage.rings.integer
 
-from sage.structure.element cimport RingElement, Element, ModuleElement, FieldElement
+from sage.structure.element cimport Element, FieldElement
 from sage.structure.parent  cimport Parent
 from sage.structure.parent_gens import ParentWithGens
 from sage.structure.richcmp cimport rich_to_bool

src/sage/rings/complex_interval.pyx

@@ -64,13 +64,12 @@ from sage.libs.flint.fmpz cimport *
 from sage.libs.mpfr cimport MPFR_RNDU, MPFR_RNDD
 from sage.arith.constants cimport LOG_TEN_TWO_PLUS_EPSILON
 
-from sage.structure.element cimport FieldElement, RingElement, Element, ModuleElement
+from sage.structure.element cimport FieldElement
 from sage.structure.parent cimport Parent
 from .complex_mpfr cimport ComplexNumber
-from .complex_mpfr import ComplexField
 from sage.rings.integer cimport Integer
 cimport sage.rings.real_mpfi as real_mpfi
-from .real_mpfr cimport RealNumber, RealField
+from .real_mpfr cimport RealNumber
 from .convert.mpfi cimport mpfi_set_sage
 from .infinity import infinity
 
@@ -90,7 +89,7 @@ def is_ComplexIntervalFieldElement(x):
     return isinstance(x, ComplexIntervalFieldElement)
 
 
-cdef class ComplexIntervalFieldElement(sage.structure.element.FieldElement):
+cdef class ComplexIntervalFieldElement(FieldElement):
     """
     A complex interval.
 

src/sage/rings/complex_mpc.pyx

@@ -69,7 +69,7 @@ from sage.libs.mpfr cimport *
 from sage.libs.mpc cimport *
 from sage.structure.parent cimport Parent
 from sage.structure.parent_gens cimport ParentWithGens
-from sage.structure.element cimport RingElement, Element, ModuleElement
+from sage.structure.element cimport Element
 from sage.structure.richcmp cimport rich_to_bool
 from sage.categories.map cimport Map
 from sage.libs.pari.all import pari
@@ -2578,5 +2578,5 @@ cdef class CCtoMPC(Map):
 
 
 # Support Python's numbers abstract base class
-import numbers
+# import numbers
 from sage.rings.complex_mpc import MPComplexNumber

src/sage/rings/complex_mpfr.pyx

@@ -30,15 +30,13 @@ AUTHORS:
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-import math
-import operator
 import weakref
 
 import sage.misc.misc
 
 from sage.libs.mpfr cimport *
 
-from sage.structure.element cimport FieldElement, RingElement, Element, ModuleElement
+from sage.structure.element cimport RingElement, Element
 from sage.structure.richcmp cimport rich_to_bool
 from sage.categories.map cimport Map
 from sage.structure.parent import Parent
@@ -48,7 +46,7 @@ from sage.misc.sage_eval import sage_eval
 
 import sage.rings.abc
 from sage.arith.constants cimport LOG_TEN_TWO_PLUS_EPSILON
-from . import ring, infinity
+from . import infinity
 from .integer cimport Integer
 
 from .complex_double cimport ComplexDoubleElement

src/sage/rings/factorint.pyx

@@ -8,7 +8,7 @@ AUTHORS:
 
 """
 
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2010-2011 André Apitzsch <[email protected]>
 #                     2012      Nils Bruin
 #                     2014      David Roe
@@ -17,16 +17,14 @@ AUTHORS:
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
-#*****************************************************************************
+#                  https://www.gnu.org/licenses/
+# ****************************************************************************
 
 from sage.ext.stdsage cimport PY_NEW
 from sage.libs.gmp.mpz cimport *
 
 from sage.rings.integer cimport Integer
-from sage.rings.fast_arith import prime_range
 from sage.structure.factorization_integer import IntegerFactorization
-from math import floor
 from sage.misc.misc_c import prod
 
 cdef extern from "limits.h":

src/sage/rings/finite_rings/element_base.pyx

@@ -505,7 +505,6 @@ cdef class FinitePolyExtElement(FiniteRingElement):
         """
         if var is None:
             var = self.parent().variable_name()
-        from sage.libs.pari.all import pari
         ffgen = self._parent.modulus()._pari_with_name(var).ffgen()
         polypari = self.polynomial()._pari_with_name()
         # Add ffgen - ffgen to ensure that we really get an FFELT

src/sage/rings/finite_rings/element_givaro.pyx

@@ -56,23 +56,16 @@ from cysignals.signals cimport sig_on, sig_off
 
 from cypari2.paridecl cimport *
 
-from sage.misc.randstate cimport randstate, current_randstate
-from sage.rings.finite_rings.finite_field_base cimport FiniteField
-from sage.rings.ring cimport Ring
+from sage.misc.randstate cimport current_randstate
 from .element_pari_ffelt cimport FiniteFieldElement_pari_ffelt
 from sage.structure.richcmp cimport richcmp
-from sage.structure.element cimport Element, ModuleElement, RingElement
-import operator
 import sage.arith.all
-import sage.rings.finite_rings.finite_field_constructor as finite_field
 
-from sage.libs.pari.all import pari
 from cypari2.gen cimport Gen
 from cypari2.stack cimport clear_stack
 
 from sage.structure.parent cimport Parent
 
-
 from sage.interfaces.abc import GapElement
 
 cdef object is_IntegerMod
@@ -1579,7 +1572,6 @@ cdef class FiniteField_givaroElement(FinitePolyExtElement):
         """
         # TODO -- I'm sure this can be made vastly faster
         # using how elements are represented as a power of the generator ??
-        import sage.arith.all
 
         if self._multiplicative_order is not None:
             return self._multiplicative_order

src/sage/rings/finite_rings/element_ntl_gf2e.pyx

@@ -34,26 +34,18 @@ from cypari2.paridecl cimport *
 
 from sage.structure.richcmp cimport (richcmp,
                                      richcmp_not_equal, rich_to_bool)
-from sage.structure.element cimport Element, ModuleElement, RingElement
 
 from sage.structure.parent cimport Parent
 
-from sage.rings.ring cimport Ring
-
 from sage.rings.finite_rings.finite_field_base cimport FiniteField
 
 from sage.libs.pari.all import pari
 from cypari2.gen cimport Gen
 from cypari2.stack cimport clear_stack
 
-from sage.misc.randstate import current_randstate
-from sage.arith.long cimport pyobject_to_long
-
 from .element_pari_ffelt import FiniteFieldElement_pari_ffelt
 from .finite_field_ntl_gf2e import FiniteField_ntl_gf2e
 
-from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
-
 from sage.interfaces.abc import GapElement
 
 

src/sage/rings/finite_rings/element_pari_ffelt.pyx

@@ -16,7 +16,6 @@ AUTHORS:
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-from cysignals.memory cimport sig_free
 from cysignals.signals cimport sig_on, sig_off
 
 from cypari2.paridecl cimport *
@@ -34,7 +33,6 @@ from sage.rings.integer cimport Integer
 from sage.rings.polynomial.polynomial_element import Polynomial
 from sage.rings.polynomial.multi_polynomial_element import MPolynomial
 from sage.rings.rational import Rational
-from sage.structure.element cimport Element, ModuleElement, RingElement
 from sage.structure.richcmp cimport rich_to_bool