提升Python CheckIo之Non-unique Elem

最近想了下还是需要捡起python的基础，所以我决定重新刷一遍checkIo，来帮助自己提升python的基础。

这里放出连接有兴趣的同学可以尝试。我将会不定期的更新，有兴趣的同学可以关注下。

Link

You are given a non-empty list of integers (X). For this task, you should return a list consisting of only the non-unique elements in this list. To do so you will need to remove all unique elements (elements which are contained in a given list only once). When solving this task, do not change the order of the list. Example: [1, 2, 3, 1, 3] 1 and 3 non-unique elements and result will be [1, 3, 1, 3].

Input: A list of integers.

Output: The list of integers.

checkio([1, 2, 3, 1, 3]) == [1, 3, 1, 3]

checkio([1, 2, 3, 4, 5]) == []

checkio([5, 5, 5, 5, 5]) == [5, 5, 5, 5, 5]

checkio([10, 9, 10, 10, 9, 8]) == [10, 9, 10, 10, 9]

# -*- coding: gbk -*- 
'''
Created on Nov 10, 2019

@author: XiGong
'''
def checkio(val):
    valS=sorted(val)
    b=[]
#     得到数组总长度
    for i in range(len(valS)):
#       如果长度为1直接添加进b  
        if(len(valS)==1):
            b.append(valS[i])
#       如果>1就要进行下一步判断
        else:
#           当i在倒数第一之间时   
            if i==len(valS)-1:
#               如果左边不等于i就添加进b  
                if(valS[i]!=valS[i-1]):
                    b.append(valS[i])  
#           当i在倒数第0之间时           
            elif i==0:
#               如果右边不等于i就添加进b                 
                if(valS[i]!=valS[i+1]):
                    b.append(valS[i])
#           当i在1和倒数第二之间时            
            else:
                 if (valS[i]!=valS[i-1]) and (valS[i]!=valS[i+1]):
                    b.append(valS[i])       
#   去除相同的                                            
    for y in range(len(b)):
        val.remove(b[y])
    return val   
if __name__ == "__main__":
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert list(checkio([1, 2, 3, 1, 3])) == [1, 3, 1, 3], "1st example"
    assert list(checkio([1, 2, 3, 4, 5])) == [], "2nd example"
    assert list(checkio([5, 5, 5, 5, 5])) == [5, 5, 5, 5, 5], "3rd example"
    assert list(checkio([10, 9, 10, 10, 9, 8])) == [10, 9, 10, 10, 9], "4th example"
    print("It is all good. Let's check it now")