17-p199.py

class Athlete:
     def __init__(self,a_name,a_dob=None,a_times=[]):
          self.name = a_name
          self.dob= a_dob
          self.times = a_times

     def top3(self):
          return (sorted(set([sanitize(t) for t in self.times]))[0:3])

     def add_time(self,time):
          self.times.append(time)

     def add_times(self,time=[]):
          #for t in time:
               #self.times.append(t)
          self.times.extend(time)
     
          
          

def sanitize(time_string): #序列化得到的无规则数据,将其格式化为 mins.secs 的格式
     if '-' in time_string:
          splitter = '-'
     elif ':' in time_string:
          splitter = ':'
     else:
          return(time_string)
     (mins,secs)=time_string.split(splitter)
     return(mins+'.'+secs)

def load_from_file(filename): #读取文件的一行(这个文件只有一行,多行咋办)
     try:
          with open (filename) as f:
               data = f.readline()
               templ = data.strip().split(',')
               return (Athlete(templ.pop(0),templ.pop(0),templ))#返回一个Athlete对象
     except IOError as err:
          print('File Error: '+str(err))
          return (None)

sarah = load_from_file('sarah2.txt')

print(sarah.name +"'s fastest times are: "+str(sarah.top3()))

sarah.add_time('2:20')
print(sarah.times)

sarah.add_times(['2:15','1:20','2-33'])
print(sarah.times)

print(sarah.name +"'s fastest times are: "+str(sarah.top3()))