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First solution in Clear category for Brackets by Fokzterrier
def checkio(expression):
a = list(expression)
b = ['(',')','[',']','{','}']
c = len(a)
d= []
for i in range(c):
if a[i] in b:
d.append(a[i])
e = len(d)
if e == 1:
for d[0] in b:
return False
if e == 0:
return True
l = 0
while True:
try:
while l
Nov. 20, 2016