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Clear solution in Creative category for Brackets by omikojangebashvili
import re
def checkio(expression):
a_re = ''.join(re.findall('[][}{)(]',expression))
for i in range(int(len(a_re)/2)):
a_re = a_re.replace('()','').replace('{}','').replace('[]','')
return not a_re
March 14, 2018