Create pstf_factory and fix unittest! :D:D

pymath/calculus/expression.py

@@ -13,6 +13,53 @@ from .random_expression import RdExpression
 
 __all__ = ['Expression']
 
+def pstf_factory(pstf_tokens):
+    """Factory which tranform postfix tokens list into an Expression or the simpliest object type ready to be rendered
+
+    :param pstf_tokens: a postfix tokens list
+    :returns: the object
+
+    >>> from .operator import op
+    >>> pstf_t = [2, 3, op.add]
+    >>> pstf_factory(pstf_t)
+    < <class 'pymath.calculus.expression.Expression'> [2, 3, '+'] >
+    >>> pstf_factory([2])
+    2
+    >>> type(pstf_factory([2]))
+    <class 'pymath.calculus.explicable.Explicable_int'>
+    >>> pstf_factory([2.45])
+    2.45
+    >>> type(pstf_factory([2.45]))
+    <class 'pymath.calculus.explicable.Explicable_float'>
+    >>> from .fraction import Fraction
+    >>> f = Fraction(1,2)
+    >>> pstf_factory([f])
+    < Fraction 1 / 2>
+
+    """
+    try:
+        l_pstf_token = len(pstf_tokens)
+    except TypeError:
+        if isinstance(pstf_tokens[0], int):
+            return Explicable_int(pstf_tokens[0])
+        elif isinstance(pstf_tokens[0], float):
+            return Explicable_float(pstf_tokens[0])
+        elif hasattr(pstf_tokens[0], 'STR_RENDER'):
+            return pstf_tokens[0]
+        else:
+            return Expression(self)
+    else:
+        if l_pstf_token == 1:
+            if isinstance(pstf_tokens[0], int):
+                return Explicable_int(pstf_tokens[0])
+            elif isinstance(pstf_tokens[0], float):
+                return Explicable_float(pstf_tokens[0])
+            elif hasattr(pstf_tokens[0], 'STR_RENDER'):
+                return pstf_tokens[0]
+            else:
+                return Expression(self)
+        else:
+            return Expression(pstf_tokens)
 
 class Expression(Explicable):
     """A calculus expression. Today it can andle only expression with numbers later it will be able to manipulate unknown"""
@@ -31,7 +78,8 @@ class Expression(Explicable):
         return Expression(random_generator(val_min, val_max))
 
     @classmethod
-    def tmp_render(cls, render=lambda _, x: Expression(x)):
+    def tmp_render(cls, render=lambda _, x: pstf_factory(x)):
+    # def tmp_render(cls, render=lambda _, x: Expression(x)):
         """ Same ad tmp_render for Renderable but default render is Expression
 
         >>> exp = Expression("2*3/5")
@@ -48,7 +96,7 @@ class Expression(Explicable):
         ...         i
         < <class 'pymath.calculus.expression.Expression'> [2, 3, 5, '/', '*'] >
         < <class 'pymath.calculus.expression.Expression'> [2, < Fraction 3 / 5>, '*'] >
-        < <class 'pymath.calculus.expression.Expression'> [3, 5, '/', 2, '*'] >
+        < <class 'pymath.calculus.expression.Expression'> [< Fraction 3 / 5>, 2, '*'] >
         < <class 'pymath.calculus.expression.Expression'> [3, 2, '*', 5, '/'] >
         < <class 'pymath.calculus.expression.Expression'> [6, 5, '/'] >
         >>> from .render import txt
@@ -380,24 +428,13 @@ class Expression(Explicable):
     def __neg__(self):
         return Expression(self.postfix_tokens + [op.sub1])
 
+
 class ExpressionError(Exception):
     pass
 
 class ComputeError(Exception):
     pass
 
-def untest(exp):
-    a = Expression(exp)
-    b = a.simplify()
-
-    for i in b.explain():
-        # print(type(i))
-        print(i)
-
-    #print(type(a.simplified()), ":", a.simplified())
-
-    print("\n")
-
 if __name__ == '__main__':
     print('\n')
     A = Expression("( -8 x + 8 ) ( -8 - ( -6 x ) )")

pymath/calculus/polynomDeg2.py

@@ -126,10 +126,7 @@ class Polynom_deg2(Polynom):
         3 \\times \\frac{ ( -1 )^{  2 } }{ 3^{  2 } } + \\frac{ -1 \\times 2 }{ 3 } + 1
         3 \\times \\frac{ 1 }{ 9 } + \\frac{ -2 }{ 3 } + 1
         \\frac{ 1 }{ 9 } \\times 3 + \\frac{ -1 }{ 3 } \\times 2 + 1
-        \\frac{ 1 \\times 1 \\times 3 }{ 3 \\times 3 } + \\frac{ -1 \\times 2 }{ 3 } + 1
+        \\frac{ 1 \\times 3 }{ 3 \\times 3 } + \\frac{ -1 \\times 2 }{ 3 } + 1
-        \\frac{ 1 \\times 3 }{ 9 } + \\frac{ -2 }{ 3 } + 1
-        \\frac{ 3 }{ 9 } + \\frac{ -2 }{ 3 } + 1
-        \\frac{ 1 \\times 3 }{ 3 \\times 3 } + \\frac{ -2 }{ 3 } + 1
         \\frac{ 1 }{ 3 } + \\frac{ -2 }{ 3 } + 1
         \\frac{ 1 - 2 }{ 3 } + 1
         \\frac{ -1 }{ 3 } + 1