Various lint fixes

src/flint/types/fmpz_mod_mat.pyx

@@ -413,7 +413,7 @@ cdef class fmpz_mod_mat(flint_mat):
                 raise ZeroDivisionError("fmpz_mod_mat div: division by zero")
             else:
                 raise DomainError("fmpz_mod_mat div: division by non-invertible element")
-        return self._scalarmul(other.inverse())
+        return self._scalarmul(inv)
 
     def __add__(self, other):
         """``M + N``: Add two matrices."""

src/flint/types/nmod.pxd

@@ -12,13 +12,16 @@ cdef class nmod_ctx:
 
     @staticmethod
     cdef nmod_ctx any_as_nmod_ctx(obj)
+
     @staticmethod
     cdef nmod_ctx _get_ctx(int mod)
+
     @staticmethod
     cdef nmod_ctx _new_ctx(ulong mod)
 
     @cython.final
     cdef int any_as_nmod(self, mp_limb_t * val, obj) except -1
+
     @cython.final
     cdef nmod new_nmod(self)
 

src/flint/types/nmod.pyx

@@ -25,7 +25,7 @@ cdef dict _nmod_ctx_cache = {}
 @cython.no_gc
 cdef class nmod_ctx:
     """
-    Context object for creating :class:`~.nmod` initalised 
+    Context object for creating :class:`~.nmod` initalised
     with modulus :math:`N`.
 
         >>> ctx = nmod_ctx.new(17)

src/flint/types/nmod_mat.pxd

@@ -19,21 +19,28 @@ cdef class nmod_mat_ctx:
 
     @staticmethod
     cdef nmod_mat_ctx any_as_nmod_mat_ctx(obj)
+
     @staticmethod
     cdef nmod_mat_ctx _get_ctx(int mod)
+
     @staticmethod
     cdef nmod_mat_ctx _new_ctx(ulong mod)
 
     @cython.final
     cdef int any_as_nmod(self, mp_limb_t * val, obj) except -1
+
     @cython.final
     cdef any_as_nmod_mat(self, obj)
+
     @cython.final
     cdef nmod new_nmod(self)
+
     @cython.final
     cdef nmod_poly new_nmod_poly(self)
+
     @cython.final
     cdef nmod_mat new_nmod_mat(self, ulong m, ulong n)
+
     @cython.final
     cdef nmod_mat new_nmod_mat_copy(self, nmod_mat other)
 

src/flint/types/nmod_mat.pyx

@@ -1,7 +1,6 @@
 cimport cython
 
 from flint.flintlib.flint cimport ulong, mp_limb_t
-from flint.flintlib.nmod cimport nmod_t
 
 from flint.flintlib.fmpz_mat cimport fmpz_mat_nrows, fmpz_mat_ncols
 from flint.flintlib.fmpz_mat cimport fmpz_mat_get_nmod_mat
@@ -123,7 +122,6 @@ cdef class nmod_mat_ctx:
     cdef any_as_nmod_mat(self, obj):
         """Convert obj to nmod_mat or return NotImplemented."""
         cdef nmod_mat r
-        cdef mp_limb_t v
 
         if typecheck(obj, nmod_mat):
             return obj
@@ -181,38 +179,38 @@ cdef class nmod_mat_ctx:
         """
         return self._is_prime
 
-   #def zero(self, slong m, slong n):
-   #    """Return the zero ``nmod_mat``.
-   #
-   #    >>> ctx = nmod_mat_ctx.new(17)
-   #    >>> ctx.zero(2, 3)
-   #    [0, 0, 0]
-   #    [0, 0, 0]
-
-   #    """
-   #    cdef nmod_mat r = self.new_nmod_mat()
-   #    nmod_mat_zero(r.val)
-   #    return r
-
-   #def one(self, slong m, slong n=-1):
-   #    """Return the one ``nmod_mat``.
-
-   #    >>> ctx = nmod_mat_ctx.new(17)
-   #    >>> ctx.one(2)
-   #    [1, 0]
-   #    [0, 1]
-   #    >>> ctx.one(2, 3)
-   #    [1, 0, 0]
-   #    [0, 1, 0]
-
-   #    """
-   #    cdef nmod_mat r = self.new_nmod_mat()
-   #    if n == -1:
-   #        n = m
-   #    n = min(m, n)
-   #    for i from 0 <= i < n:
-   #        nmod_mat_set_entry(r.val, i, i, 1)
-   #    return r
+    #def zero(self, slong m, slong n):
+    #    """Return the zero ``nmod_mat``.
+    #
+    #    >>> ctx = nmod_mat_ctx.new(17)
+    #    >>> ctx.zero(2, 3)
+    #    [0, 0, 0]
+    #    [0, 0, 0]
+
+    #    """
+    #    cdef nmod_mat r = self.new_nmod_mat()
+    #    nmod_mat_zero(r.val)
+    #    return r
+
+    #def one(self, slong m, slong n=-1):
+    #    """Return the one ``nmod_mat``.
+
+    #    >>> ctx = nmod_mat_ctx.new(17)
+    #    >>> ctx.one(2)
+    #    [1, 0]
+    #    [0, 1]
+    #    >>> ctx.one(2, 3)
+    #    [1, 0, 0]
+    #    [0, 1, 0]
+
+    #    """
+    #    cdef nmod_mat r = self.new_nmod_mat()
+    #    if n == -1:
+    #        n = m
+    #    n = min(m, n)
+    #    for i from 0 <= i < n:
+    #        nmod_mat_set_entry(r.val, i, i, 1)
+    #    return r
 
     def __str__(self):
         return f"Context for nmod_mat with modulus: {self.mod.n}"
@@ -491,9 +489,7 @@ cdef class nmod_mat(flint_mat):
         return r
 
     def __rmul__(s, t):
-        cdef nmod_mat_struct *sv
         cdef mp_limb_t c
-        sv = &(<nmod_mat>s).val[0]
         if s.ctx.any_as_nmod(&c, t):
             return (<nmod_mat>s).__mul_nmod(c)
         u = s.ctx.any_as_nmod_mat(t)

src/flint/types/nmod_poly.pxd

@@ -17,19 +17,25 @@ cdef class nmod_poly_ctx:
 
     @staticmethod
     cdef nmod_poly_ctx any_as_nmod_poly_ctx(obj)
+
     @staticmethod
     cdef nmod_poly_ctx _get_ctx(int mod)
+
     @staticmethod
     cdef nmod_poly_ctx _new_ctx(ulong mod)
 
     @cython.final
     cdef nmod_poly_set_list(self, nmod_poly_t poly, list val)
+
     @cython.final
     cdef int any_as_nmod(self, mp_limb_t * val, obj) except -1
+
     @cython.final
     cdef any_as_nmod_poly(self, obj)
+
     @cython.final
     cdef nmod new_nmod(self)
+
     @cython.final
     cdef nmod_poly new_nmod_poly(self)
 

src/flint/types/nmod_poly.pyx

@@ -12,7 +12,6 @@ from flint.flintlib.nmod_vec cimport *
 from flint.flintlib.nmod_poly cimport *
 from flint.flintlib.nmod_poly_factor cimport *
 from flint.flintlib.fmpz_poly cimport fmpz_poly_get_nmod_poly
-from flint.flintlib.ulong_extras cimport n_gcdinv, n_is_prime
 
 from flint.utils.flint_exceptions import DomainError
 
@@ -104,7 +103,6 @@ cdef class nmod_poly_ctx:
         n = PyList_GET_SIZE(val)
         nmod_poly_fit_length(poly, n)
         for i from 0 <= i < n:
-            c = val[i]
             if self.any_as_nmod(&v, val[i]):
                 nmod_poly_set_coeff_ui(poly, i, v)
             else:
@@ -393,7 +391,7 @@ cdef class nmod_poly(flint_poly):
             raise ValueError(f"{n = } must be positive")
 
         if nmod_poly_get_coeff_ui(self.val, 0) == 0:
-            raise ZeroDivisionError(f"nmod_poly inverse_series_trunc: leading coefficient is zero")
+            raise ZeroDivisionError("nmod_poly inverse_series_trunc: leading coefficient is zero")
 
         if not self.ctx._is_prime:
             raise DomainError(f"nmod_poly inverse_series_trunc: modulus {self.ctx.mod.n} is not prime")
@@ -840,7 +838,7 @@ cdef class nmod_poly(flint_poly):
 
     def sqrt(nmod_poly self):
         """Return exact square root or ``None``. """
-        cdef nmod_poly
+        cdef nmod_poly res
 
         if not self.ctx._is_prime:
             raise DomainError(f"nmod_poly sqrt: modulus {self.ctx.mod.n} is not prime")