Python实现比较两个列表(list)范围

有一道题：比较两个列表范围，如果包含的话，返回TRUE，否则FALSE。详细题目如下：

Create a function,this function receives two lists as parameters,each list indicates a scope of numbers,the function judges whether list2 is included in list1.

Function signature:
differ_scope(list1,list2)

Parameters:
    list1,list2    - list1 and list2 are constructed with strings,
                      each string indicates a number or a scope of
                      numbers. The number or scope are randomly,can
                      be overlapped. All numbers are positive.

                        E.g.
                            ['23','44-67','12','3','20-90']
Return Values:
    True            - if all scopes and numbers indicated by list2 are included in list1.
    False           - if any scope or number in list2 is out of the range in list1.
Examples:
    case1    - list1 = ['23','20-90']
               list2 = ['22-34','33',45','60-61']
               differ_scope(list1,list2) == True
    case2    - list1 = ['23','60-61','100']
               differ_scope(list1,list2) == False

贴上自己写的代码如下:(备注： python 2.7.6)

def differ_scope(list1,list2): 
  print "list1:" + str(list1) 
  print "list2:" + str(list2) 
  #设置临时存放列表 
  list1_not_ = [] #用于存放列表1正常的数字值，当然要用int()来转换 
  list1_yes_ = [] #用于存放列表1中范围值如 44-67 
  list1_final = [] #用于存放列表1中最终范围值 如:[1,2,3,4,5,6,7,8,9,10] 
  temp1    = [] 
   
  list2_not_ = []  #用于存放列表2正常的数字值，当然要用int()来转换 
  list2_yes_ = []  #用于存放列表2中范围值如 44-67 
  list2_final= []  #用于存放列表2中最终范围值 如:[1,10] 
  temp2   = [] 
 
  temp    = []  #用于存放列表1,与列表2比较后的列表,从而判断结果为True还是False. 
   
  #对列表1进行处理 
  for i in range(len(list1)): #用FOR循环对列表1进行遍历 
    tag = 0 
    if list1[i].find('-')>0:#对含范围的数字进行处理，放到list_yes_列表中  
      strlist = list1[i].split('-') 
    list1_yes_ = range(int(strlist[0]),int(strlist[1])+1)#让其生成一个范围列表 
    for each in list1_yes_:     #FOR循环遍历所有符合条件的. 
        [temp1.append(each)] 
    else:           #对列表1中正常的数字进行处理，放到list_not_列表中 
      list1_not_.append(int(list1[i]))#对列表1中进行处理，放到list_yes_    
  [temp1.append(i) for i in list1_not_ if not i in temp1]#去除重复项 
  list1_final = sorted(temp1) #比较后,排序,并放到list1_final列表中 
  print "list1_final value is:" + str(list1_final)#打印排序后最终list1_final列表 
 
   
  #对列表2进行处理 
  for i in range(len(list2)): 
    if list2[i].find('-')>0: 
      strlist = list2[i].split('-') 
    list2_yes_ = range(int(strlist[0]),int(strlist[1])+1) 
    for each in list2_yes_: 
        [temp2.append(each)] 
      print "Temp2:" + str(temp2) 
    else: 
      list2_not_.append(int(list2[i])) 
  [temp2.append(i) for i in list2_not_ if not i in temp2] 
  list2_final = sorted(temp2) 
  print "list2_final value is:" + str(list2_final) 
 
  #对两个列表进行比较,得出最终比较结果. 
  [temp.append(i) for i in list2_final if not i in list1_final]#比较两个列表差值. 
  print "In list2 but not in list1:%s" % (temp)#打印出列表1与列表2的差值 
  if len(temp)>=1 : 
    print "The result is: False" 
  else: 
    print "The result is: True" 
 
if __name__ == '__main__': 
  list1 = ['23','90-100'] 
  list2 = ['22-34','45'] 
  differ_scope(list1,list2)

总结：
1. 这道题关键是想法，如果整成坐标的方式来比较，会很麻烦。
2. 列表转成范围后，如果消除重复项，同样是里面的关键所在。
3. 其次是对列表遍历的操作，同样挺重要。

Python实现比较两个列表(list)范围

相关推荐