def str2float(s):
for i in range(len(s)):
if s[i]=='.':
loc=i
def digits(p):
DIGITS={'0':0,'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7,'8':8,'9':9}
return DIGITS[p]
pat1=reduce(lambda x,y:10*x+y,map(digits,s[:loc]))
pat2=reduce(lambda x,y:x/10+y,map(digits,s[-1:loc:-1]))
final=pat1+pat2/10
return final
金葛城
第三题