Some PEP8 rectifications

mapytex/calculus/core/MO/fraction.py

@@ -7,7 +7,7 @@
 # Distributed under terms of the MIT license.
 
 from mapytex.calculus.core.tree import Tree
-from .mo import MO, MOError
+from .mo import MO
 
 __all__ = ["MOFraction"]
 
@@ -33,9 +33,9 @@ class MOFraction(MO):
         <MOFraction - 2 / 3>
         """
         base_value = Tree("/",
-                MO.factory(numerator),
-                MO.factory(denominator),
-                )
+                          MO.factory(numerator),
+                          MO.factory(denominator),
+                         )
         if negative:
             value = Tree("-", None, base_value)
         else:

mapytex/calculus/core/MO/mo.py

@@ -6,9 +6,9 @@
 #
 # Distributed under terms of the MIT license.
 
+from decimal import Decimal
 from ..coroutine import coroutine, STOOOP
 from ..renders import tree2txt, tree2tex
-from decimal import Decimal
 
 
 __all__ = ["moify", "MO", "MOstr"]
@@ -43,23 +43,22 @@ class MO(object):
 
     """MO for math object
 
-    This base class is representing int and Decimal. It stocks its value in 
-    self.value and it 
-    
+    This base class is representing int and Decimal. It stocks its value in
+    self.value and it
+
     """
 
     def __init__(self, value):
         """ Initiate the MO
 
         It should be idempotent.
-        
+
         >>> a = MO(3)
         >>> a
         <MO 3>
         >>> a = MO(a)
         >>> a
         <MO 3>
-        
         """
         try:
             self.value = value.value
@@ -107,7 +106,7 @@ class MOnumber(MO):
 
     """ Base number math object (int or Decimal) """
 
-    def __init__(self, value, negative=False):
+    def __init__(self, value):
         """ Initiate a number MO
 
         >>> MOnumber(23)
@@ -134,7 +133,7 @@ class MOnumber(MO):
         except AttributeError:
             val = value
 
-        if isinstance(val, int) or isinstance(val, Decimal):
+        if isinstance(val, (int, Decimal)):
             MO.__init__(self, value)
         elif isinstance(val, float):
             MO.__init__(self, Decimal(val))
@@ -154,7 +153,7 @@ class MOnumber(MO):
             return str(self.value)
 
         return f"- {abs(self.value)}"
-        
+
 class MOstr(MO):
 
     """ Unknown math object like x or n"""
@@ -197,7 +196,7 @@ class MOstr(MO):
 
         MO.__init__(self, value)
         self.is_scalar = False
-        
+
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