allow import of txt and add todo on database

pymath/__init__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # encoding: utf-8
 
-from .calculus import Expression, Polynom, Fraction, random_str
+from .calculus import Expression, Polynom, Fraction, random_str, txt
 from .stat import Dataset, WeightedDataset
 
 # -----------------------------

pymath/calculus/__init__.py

@@ -5,7 +5,7 @@ from .expression import Expression
 from .polynom import Polynom
 from .fraction import Fraction
 from .random_expression import random_str
-#from .render import txt,tex
+from .render import txt
 
 
 # -----------------------------

pymath/stat/dataset.py

@@ -7,6 +7,8 @@
 #
 #
 
+# TODO: Rendre toutes les réponses Explicable!! |mar. janv. 12 09:41:00 EAT 2016
+
 from math import sqrt, ceil
 from .number_tools import number_factory
 from .random_generator import random_generator