英文:
why am i getting index out of range error here please explain
问题
new_str = input()
for j in range(len(new_str)):
for k in range(j+1, len(new_str)):
if new_str[j] == new_str[k]:
new_str = new_str[:k] + new_str[k+1:]
print(new_str)
这里我尝试删除字符串中重复的字符并打印出来，但是出现了"string index out of range"错误。我不明白为什么会出现这个错误。有人可以解释一下吗？
错误信息如下：
Traceback (most recent call last):
File "/tmp/submission/20230712/16/14/hackerrank-253aaa8879419e0d201489ccb06df6d8/code/Solution.py", line 17, in
merge_the_tools(string, k)
File "/tmp/submission/20230712/16/14/hackerrank-253aaa8879419e0d201489ccb06df6d8/code/Solution.py", line 7, in merge_the_tools
if new_str[j] == new_str[k]:
~~~~~~~^^^
IndexError: string index out of range
<details>
<summary>英文:</summary>
new_str=input()
for j in range(len(new_str)):
for k in range(j+1,len(new_str)):
if new_str[j]==new_str[k]:
new_str=new_str[:k]+new_str[k+1:]
print(new_str)
Here I am trying to remove the repeated letters of a string and print it but I am getting the error of string index out of range. I am not understanding why. Can anyone explain me why?
the error is
Traceback (most recent call last):
File "/tmp/submission/20230712/16/14/hackerrank-253aaa8879419e0d201489ccb06df6d8/code/Solution.py", line 17, in <module>
merge_the_tools(string, k)
File "/tmp/submission/20230712/16/14/hackerrank-253aaa8879419e0d201489ccb06df6d8/code/Solution.py", line 7, in merge_the_tools
if new_str[j]==new_str[k]:
~~~~~~~^^^
IndexError: string index out of range
</details>
# 答案1
**得分**: 0
你在遍历循环时改变了字符串的长度，正如Taha的答案所述，这导致了`IndexError`。在这种情况下，最好使用`while`循环而不是`for`循环，它基于字符串的初始长度运行。
下面是更新后的代码。
```python
new_str = input()
left = 0
while left < len(new_str) - 1:
right = left + 1
while right < len(new_str):
if new_str[left] == new_str[right]:
new_str = new_str[:right] + new_str[right + 1:]
right += 1
left += 1
print(new_str)
在这里，left 和 right 分别代表你的迭代器 j 和 k。
输出（正面情况）：
akka
ak
输出（负面情况）：
ghij
ghij
英文:
You're changing the string length while iterating over the loop, as Taha's answer told, which is causing the IndexError. In this case, it's better to use a while loop rather than a for loop, which runs based on the initial length of the string.
Here's the updated code.
new_str=input()
left = 0
while left < len(new_str)-1:
right = left + 1
while right < len(new_str):
if new_str[left] == new_str[right]:
new_str = new_str[:right] + new_str[right+1:]
right += 1
left += 1
print(new_str)
left and right stand for your iterators j and k respectively here.
Output (Positive Case):
akka
ak
Output (Negative Case):
ghij
ghij
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论