Merge sagemath#33146

src/sage/combinat/words/finite_word.py

@@ -202,7 +202,7 @@
     sage: f.bispecial_factors()
     [word: , word: 0, word: 010, word: 010010, word: 01001010010]
 """
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2008 Arnaud Bergeron <[email protected]>,
 #                     2008 Amy Glen <[email protected]>,
 #                     2008-2012 Sébastien Labbé <[email protected]>,
@@ -213,17 +213,21 @@
 # the Free Software Foundation, either version 2 of the License, or
 # (at your option) any later version.
 #                  https://www.gnu.org/licenses/
-#*****************************************************************************
+# ****************************************************************************
 from itertools import repeat
 from collections import defaultdict
 from itertools import islice, cycle
 from sage.combinat.words.abstract_word import Word_class
 from sage.combinat.words.words import Words
 from sage.misc.cachefunc import cached_method
 from sage.combinat.words.word_options import word_options
-from sage.rings.all import Integer, Infinity, ZZ, QQ
+from sage.rings.infinity import Infinity
+from sage.rings.integer import Integer
+from sage.rings.integer_ring import ZZ
+from sage.rings.rational_field import QQ
 from sage.sets.set import Set
 
+
 class FiniteWord_class(Word_class):
     def __str__(self):
         r"""
@@ -409,7 +413,7 @@ def concatenate(self, other):
             return other
         if isinstance(other, Word_class) and other.is_empty():
             return self
-        f = CallableFromListOfWords([self,other])
+        f = CallableFromListOfWords([self, other])
         length = self.length() + other.length()
         parent = self._parent
         if length == Infinity:
@@ -623,7 +627,7 @@ def is_yamanouchi(self, n=None):
                 return False
         return True
 
-    def schuetzenberger_involution(self, n = None):
+    def schuetzenberger_involution(self, n=None):
         r"""
         Return the Schützenberger involution of the word ``self``, which is obtained
         by reverting the word and then complementing all letters within the
@@ -6922,7 +6926,7 @@ def colored_vector(self, x=0, y=0, width='default', height=1, cmap='hsv', thickn
             xq = xp + base
             L = [(xp,y), (xq,y), (xq,ymax), (xp,ymax) ]
             rgbcolor = mpl_cmap( i / dim ) [:3]
-            rep += polygon(L, rgbcolor = rgbcolor)
+            rep += polygon(L, rgbcolor=rgbcolor)
             xp = xq
         rep.axes(False)
         return rep