Expression python name from object to this package.

Author: gutow

Demonstration of equation class.ipynb

@@ -28,7 +28,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "This notebook is running Algebra_with_Sympy version 1.1.1.\n"
+      "This notebook is running Algebra_with_Sympy version 1.1.2.\n"
      ]
     }
    ],
@@ -1306,7 +1306,7 @@
     {
      "data": {
       "text/latex": [
-       "$c^{2} - c + x^{4} \\left(a^{2} + 2 a + 1\\right) + x^{3} \\cdot \\left(2 a^{2} + 2 a b + 2 a + 2 b\\right) + x^{2} \\left(a^{2} + 2 a b + 2 a c - a + b^{2} + 2 c - 1\\right) + x \\left(2 a c - a + 2 b c - b\\right)=a^{2} x^{4} + 4 c^{2} + 2 c + x^{3} \\cdot \\left(2 a^{2} + 2 a b\\right) + x^{2} \\left(a^{2} + 2 a b + 4 a c + a + b^{2}\\right) + x \\left(4 a c + a + 4 b c + b\\right)$"
+       "$c^{2} - c + x^{4} \\left(a^{2} + 2 a + 1\\right) + x^{3} \\left(2 a^{2} + 2 a b + 2 a + 2 b\\right) + x^{2} \\left(a^{2} + 2 a b + 2 a c - a + b^{2} + 2 c - 1\\right) + x \\left(2 a c - a + 2 b c - b\\right)=a^{2} x^{4} + 4 c^{2} + 2 c + x^{3} \\left(2 a^{2} + 2 a b\\right) + x^{2} \\left(a^{2} + 2 a b + 4 a c + a + b^{2}\\right) + x \\left(4 a c + a + 4 b c + b\\right)$"
       ],
       "text/plain": [
        "Equation(c**2 - c + x**4*(a**2 + 2*a + 1) + x**3*(2*a**2 + 2*a*b + 2*a + 2*b) + x**2*(a**2 + 2*a*b + 2*a*c - a + b**2 + 2*c - 1) + x*(2*a*c - a + 2*b*c - b), a**2*x**4 + 4*c**2 + 2*c + x**3*(2*a**2 + 2*a*b) + x**2*(a**2 + 2*a*b + 4*a*c + a + b**2) + x*(4*a*c + a + 4*b*c + b))"
@@ -1330,7 +1330,7 @@
     {
      "data": {
       "text/latex": [
-       "$c^{2} - c + x^{4} \\left(a^{2} + 2 a + 1\\right) + x^{3} \\cdot \\left(2 a^{2} + 2 a b + 2 a + 2 b\\right) + x^{2} \\left(a^{2} + 2 a b + 2 a c - a + b^{2} + 2 c - 1\\right) + x \\left(2 a c - a + 2 b c - b\\right)=a^{2} x^{4} + 4 c^{2} + 2 c + x^{3} \\cdot \\left(2 a^{2} + 2 a b\\right) + x^{2} \\left(a^{2} + 2 a b + 4 a c + a + b^{2}\\right) + x \\left(4 a c + a + 4 b c + b\\right)$"
+       "$c^{2} - c + x^{4} \\left(a^{2} + 2 a + 1\\right) + x^{3} \\left(2 a^{2} + 2 a b + 2 a + 2 b\\right) + x^{2} \\left(a^{2} + 2 a b + 2 a c - a + b^{2} + 2 c - 1\\right) + x \\left(2 a c - a + 2 b c - b\\right)=a^{2} x^{4} + 4 c^{2} + 2 c + x^{3} \\left(2 a^{2} + 2 a b\\right) + x^{2} \\left(a^{2} + 2 a b + 4 a c + a + b^{2}\\right) + x \\left(4 a c + a + 4 b c + b\\right)$"
       ],
       "text/plain": [
        "Equation(c**2 - c + x**4*(a**2 + 2*a + 1) + x**3*(2*a**2 + 2*a*b + 2*a + 2*b) + x**2*(a**2 + 2*a*b + 2*a*c - a + b**2 + 2*c - 1) + x*(2*a*c - a + 2*b*c - b), a**2*x**4 + 4*c**2 + 2*c + x**3*(2*a**2 + 2*a*b) + x**2*(a**2 + 2*a*b + 4*a*c + a + b**2) + x*(4*a*c + a + 4*b*c + b))"
@@ -4184,7 +4184,7 @@
     {
      "data": {
       "text/plain": [
-       "'1.1.1'"
+       "'1.1.2'"
       ]
      },
      "execution_count": 168,
@@ -4204,7 +4204,7 @@
     {
      "data": {
       "text/plain": [
-       "'1.1.1'"
+       "'1.1.2'"
       ]
      },
      "execution_count": 169,

algebra_with_sympy/algebraic_equation.py

@@ -388,6 +388,21 @@ def integers_as_exact(self):
             """
             return self.integers_as_exact
 
+def __get_sympy_expr_name__(expr):
+    """
+    Tries to find the python string name that refers to a sympy object. In
+    IPython environments (IPython, Jupyter, etc...) looks in the user_ns.
+    If not in an IPython environment looks in __main__.
+    :return: string value if found or empty string.
+    """
+    import __main__ as shell
+    for k in dir(shell):
+        item = getattr(shell, k)
+        if isinstance(item, Basic):
+            if item == expr and not k.startswith('_'):
+                return k
+    return ''
+
 def __latex_override__(expr, *arg):
     algwsym_config = False
     ip = False
@@ -420,7 +435,7 @@ def __latex_override__(expr, *arg):
         tempstr = ''
         namestr = ''
         if isinstance(expr, Equation):
-            namestr = expr._get_eqn_name()
+            namestr = __get_sympy_expr_name__(expr)
         if namestr != '' and algwsym_config and algwsym_config.output.label:
             tempstr += r'$'+latex(expr)
             # work around for colab's inconsistent handling of mixed latex and
@@ -450,7 +465,7 @@ def __command_line_printing__(expr, *arg):
         labelstr = ''
         namestr = ''
         if isinstance(expr, Equation):
-            namestr = expr._get_eqn_name()
+            namestr = __get_sympy_expr_name__(expr)
         if namestr != '' and algwsym_config.output.label:
             labelstr += '          (' + namestr + ')'
         return print(tempstr + str(expr) + labelstr)

version.py

@@ -1 +1 @@
-__version__ = '1.1.2'
+__version__ = '1.1.3dev0'