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dd simplified method for Expression

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This commit is contained in:
Lafrite 2014-12-19 15:40:35 +01:00
parent 450af74a0d
commit 5df17b4779
1 changed files with 8 additions and 0 deletions
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8
pymath/expression.py
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@ -72,6 +72,12 @@ class Expression(object):
for s in self.child.simplify(): for s in self.child.simplify():
if old_s != s: if old_s != s:
yield s yield s
def simplified(self):
""" Get the simplified version of the expression """
if not self.can_go_further():
return self.postfix_tokens[0]
else:
return self.child.simplified()
def can_go_further(self): def can_go_further(self):
"""Check whether it's a last step or not. If not create self.child the next expression. """Check whether it's a last step or not. If not create self.child the next expression.
@ -197,6 +203,8 @@ def test(exp):
for i in a.simplify(): for i in a.simplify():
print(i) print(i)
print(type(a.simplified()), ":", a.simplified())
print("\n") print("\n")
if __name__ == '__main__': if __name__ == '__main__':