Random classmethod for polynom

pymath/polynom.py

@@ -7,6 +7,7 @@ from .operator import op
 from .generic import spe_zip, expand_list, isNumber, transpose_fill, flatten_list
 #from .generic import spe_zip, sum_postfix, expand_list, isNumber
 from .render import txt
+from .random_expression import RdExpression
 from itertools import chain
 
 __all__ = ["Polynom"]
@@ -16,6 +17,20 @@ class Polynom(object):
 
     """Docstring for Polynom. """
 
+    @classmethod
+    def random(self, coefs_form=[], conditions=[], letter = "x"):
+        """ Create a random polynom from coefs_form and conditions 
+
+        :param coefs_form: list of forms (one by coef) (ascending degree sorted)
+        :param conditions: condition on variables 
+
+        /!\ variables need to be in brackets {}
+
+        """
+        form = str(coefs_form)
+        coefs = RdExpression(form, conditions)()
+        return Polynom(coef = eval(coefs), letter = letter)
+
     def __init__(self, coef = [1], letter = "x" ):
         """Initiate the polynom
 
@@ -331,6 +346,10 @@ if __name__ == '__main__':
     #for i in p.simplify():
     #    print(repr(i))
 
+    print("\n")
+    poly = Polynom.random(["{a**2}", "{2*a*b}", "{b**2}"]) 
+    print(poly)
+
     import doctest
     doctest.testmod()
 

pymath/random_expression.py

@@ -27,7 +27,7 @@ class RdExpression(object):
 
         self._letters = self.get_letters()
         self._gene_varia = {}
-        self._gene_2replaced= {}
+        self._gene_2replaced = {}
 
     def get_2replaced(self):
         """Get elements of self._form which will have to be replaced
@@ -74,12 +74,6 @@ class RdExpression(object):
         :returns: an formated random expression 
 
         """
-        #if self.FORM == "exp":
-        #    return self.raw_exp(val_min, val_max)
-        #elif self.FORM == "raw":
-        #    return self.raw_str(val_min, val_max)
-        #else:
-        #    raise ValueError(self.FORM , " is an undefined form for self.FORM")
         return self.raw_str(val_min, val_max)
 
     def raw_str(self, val_min = -10, val_max = 10):