def print_prime(n):
for i in xrange(2, n):
# found = True
for j in xrange(2, i):
if i % j == 0:
# found = False
break
else:
print "{} it's a prime number".format(i)
# if found:
# print "{} it's a prime number".format(i)
print_prime(7)
2 it's a prime number
3 it's a prime number
5 it's a prime number
def my_to_int(str_param):
try:
print int(str_param)
except ValueError:
print 'cannot convert {} to a integer'.format(str_param)
else:
print 'convert {} to integer successfully'.format(str_param)
my_to_int("123")
my_to_int("me123")
123
convert 123 to integer successfully
cannot convert me123 to a integer
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