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fixed balanced_parentheses, Added infix-prefix & postfix evaluation #621

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Merged
merged 3 commits into from
Mar 1, 2019
Merged

fixed balanced_parentheses, Added infix-prefix & postfix evaluation #621

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6d7e15b
Create infix_to_prefix_conversion.py
ashwek Nov 30, 2018
92f8271
Create postfix_evaluation.py
ashwek Nov 30, 2018
1b0fbe3
Update balanced_parentheses.py
ashwek Nov 30, 2018
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Update balanced_parentheses.py
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@ashwek
ashwek authored Nov 30, 2018
commit 1b0fbe39118397bb283878733539295707285b87
6 changes: 4 additions & 2 deletions data_structures/stacks/balanced_parentheses.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
from __future__ import print_function
from __future__ import absolute_import
from .Stack import Stack
from stack import Stack

__author__ = 'Omkar Pathak'

Expand All @@ -12,8 +12,10 @@ def balanced_parentheses(parentheses):
if parenthesis == '(':
stack.push(parenthesis)
elif parenthesis == ')':
if stack.is_empty():
return False
stack.pop()
return not stack.is_empty()
return stack.is_empty()


if __name__ == '__main__':
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