[Head First Python]5. 推导数据:处理数据

读取4个文件内容,格式化数据,升序,显示每个文件前3个数据

julie.txt

2.59,2.11,2:11,2:23,3-10,2-23,3:10,3.21,3-21

james.txt

2-34,3:21,2.34,2.45,3.01,2:01,2:01,3:10,2-22

sarah.txt

2:58,2.58,2:39,2-25,2-55,2:54,2.18,2:55,2:55

mikey.txt

2:22,3.01,3:01,3.02,3:02,3.02,3:22,2.49,2:38

chapter5.py

 def get_coach_data(filename):
     try:
         with open(filename) as f:
             data = f.readline()
             return ( data.strip().split(','))
     except IOError as err:
         print('File err:' + str(err))
         return(None)

 def sanitize(time_string):
     if '-' in time_string:
         splitter = '-'
     elif ':' in time_string:
         splitter = ':'
     else:
         return(time_string)

     (mins, secs) = time_string.split(splitter)
     return(mins + '.' + secs)

 try:
     julie = get_coach_data('julie.txt')
     james = get_coach_data('james.txt')
     sarah = get_coach_data('sarah.txt')
     mikey = get_coach_data('mikey.txt')    

     print( sorted( set ([sanitize(s) for s in julie]) )[0:3] )
     print( sorted( set ([sanitize(s) for s in james]) )[0:3] )
     print( sorted( set ([sanitize(s) for s in sarah]) )[0:3] )
     print( sorted( set ([sanitize(s) for s in mikey]) )[0:3] )

 except IOError as err:
     print("file error" + str(err))