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First solution in Uncategorized category for Brackets by bryukh
def checkio(data):
"""str -> bool
Check open and close of brackets
"""
stack = []
pairs = {'(': ')', '[': ']', '{': '}'}
for token in data:
if token in pairs.keys():
stack.append(token)
elif token in pairs.values():
if stack and token == pairs[stack[-1]]:
stack.pop()
else:
return False
return False if stack else True
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio("((5+3)*2+1)") == True, "Simple"
assert checkio("{[(3+1)+2]+}") == True, "Different types"
assert checkio("(3+{1-1)}") == False, ") is alone inside {}"
assert checkio("[1+1]+(2*2)-{3/3}") == True, "Different operators"
assert checkio("(({[(((1)-2)+3)-3]/3}-3)") == False, "One is redundant"
May 11, 2013
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