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while True:
try:
x = int(raw_input('Input a number:'))
y = int(raw_input('Input a number:'))
z = x / y
except ValueError, ev:
print 'That is not a valid number.', ev
except ZeroDivisionError, ez:
print 'Di ......
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search re.search(pattern, string, flags) flags:re.I re.M re.X re.S re.L re.U
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