蟒蛇重複檢查通過反轉字符串

Question

我有以下形式鍵的字典：

d['a:b'] 
d['c:d'] 
d['e:f'] 
d['d:c'] 
d['b:a'] 
d['f:e'] 

我如何檢查並刪除重複，在重複的將是

d['a:b'] = d['b:a'] 

所以檢查和刪除後，字典將包括

d['a:b'] 
d['c:d'] 
d['e:f'] 

Answer 1

d.keys（）返回一個副本，所以項目可以被彈出。

d = { k:None for k in ('a:b','c:d','e:f','d:c','b:a','f:e') } 
for k in d.keys(): 
    if '{}:{}'.format(k[2],k[0]) in d: 
     d.pop(k) 

Answer 2

unique = [] 
delete = [] 
for key in d.keys(): 
    if key[::-1] in unique: 
    delete.append(key) 
    else: 
    unique.append(key) 
for key in delete: del d[key] 

不是很好用兩個迴路，但工程

Answer 3

unique = [] 
for key in sorted(d.keys()): 
    if key in unique or key[-1] + key[1] + key[0] in unique: 
     d.pop(key) 
    unique.append(key) 
print d