Python – 字符串的镜像

给定一个字符串，执行它的镜像，如果不能使用英文字符镜像，则返回“Not possible”。

Input : test_str = ‘boid’
Output : doib
Explanation : d replaced by b and vice-versa as being mirror images.

Input : test_str = ‘gfg’
Output : Not Possible
Explanation : Valid Mirror image not possible.

方法：使用循环+循环字典

这是可以执行此任务的一种方式。在此，我们为所有有效的可镜像英文字符构建查找字典，然后从它们执行访问任务。

Python3

# Python3 code to demonstrate working of 
# Mirror Image of String
# Using Mirror Image of String
  
# initializing strings
test_str = 'void'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing mirror dictionary
mir_dict = {'b':'d', 'd':'b', 'i':'i', 'o':'o', 'v':'v', 'w':'w', 'x':'x'}
res = ''
  
# accessing letters from dictionary
for ele in test_str:
    if ele in mir_dict:
        res += mir_dict[ele]
      
    # if any character not present, flagging to be invalid 
    else:
        res = "Not Possible"
        break
  
# printing result 
print("The mirror string : " + str(res))

输出

The original string is : void
The mirror string : voib