如何在循环中获取索引(数组下标)

for i in range (0,len(list)):
      print i ,list[i]

def enumerate(collection):
      'Generates an indexed series:  (0,coll[0]), (1,coll[1]) ...'
           i = 0       
           it = iter(collection)       
       while 1:       
           yield (i, it.next())       
           i += 1

for index，text in enumerate(list)):     
    print index ,text

count = len(open(thefilepath,‘rU’).readlines())

Count = -1  For count,line in enumerate(open(thefilepath,‘rU’))：      
    Pass Count += 1