def myAtoi(self, s):

"""

s = s.strip()

a = s

num = ["-", "+", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"]

for i in num:

a = a.replace(unicode(i), "")

if len(a) != 0:

first_ng = a[0]

s = s.split(first_ng)[0]

if s:

if (s.count("+") + s.count("-")) > 1 or ((s.count("+") + s.count("-")) == 1 and len(s) == 1):

return 0

ds = int(s)

if ds < -2147483648:

return -2147483648

elif ds > 2147483647:

return 2147483647

return ds