if last_occurrence == -1: print(f"Character '{char}' not found in the string.") else: print(f"Last occurrence of '{char}' is at index:", last_occurrence) # 输出: # Last occurrence of 'o' is at index: 27 # Last occurrence of 'l' is at index: 10 # Character 'z' not fou...
"char="o"try:last_index=str.rindex(char)print(f"The last occurrence of '{char}' is at index{last_index}.")exceptValueError:print(f"The character '{char}' does not exist in the string.") 1. 2. 3. 4. 5. 6. 7. 8. 如果字符存在,该代码会输出:The last occurrence of 'o' is a...
# 从后往前查找字符串deffind_last_occurrence(string,substring):n=len(substring)foriinrange(len(string)-n,-1,-1):ifstring[i:i+n]==substring:returnireturn-1 1. 2. 3. 4. 5. 6. 7. 上述代码中,string是待查找的字符串,substring是待查找的子字符串。通过循环遍历,分别比较从末尾开始的子字符...
Traceback (most recent call last): File "<string>", line 6, in result = sentence.index('Java') ValueError: substring not found Note:Index in Python starts from0and not1. So the occurrence is19and not20. Example 2: index() With start and end Arguments sentence ='Python programming is...
String of ASCII characters which are considered punctuation characters in the C locale. 10) string.printable 所有可打印的字符集,包含数字,字母,标点空白符 String of characters which are considered printable. This is a combination of digits, letters, punctuation, and whitespace. ...
2. Using theindex()Method (For Finding the First Occurrence) Theindex()method is used to find the index of the first occurrence of a specified element in a list. This method is particularly useful when you need to know the position of a specific element within a list. ...
insert L.insert(index, object)--insert object before index pop L.pop([index])-> item -- removeandreturnitem at index (default last) remove L.remove(value)--remove first occurrence of value reverse L.reverse()-- reverse *IN PLACE*sort L.sort([cmpfunc])-- sort *IN PLACE*;ifgiven,...
将String 变量转换为 float、int 或 boolean 向字符串填充或添加零的不同方法 去掉字符串中的 space 字符 生成N个字符的随机字符串 以不同的方式反转字符串 将Camel Case 转换为 Snake Case 并更改给定字符串中特定字符的大小写 检查给定的字符串是否是 Python 中的回文字符串 ...
Write a Python program to create a list of tuples where each tuple contains a character and its index in the string. Write a Python program to implement a function that returns a dictionary mapping each character in a string to its first occurrence index.Go...
Python Exercises, Practice and Solution: Write a Python program to find the index position of the last occurrence of a given number in a sorted list using Binary Search (bisect).