strings_and_positions=[("Python programming",0,6),("Data Science",5,12),("Machine Learning",0,7)]foriteminstrings_and_positions:string,start,end=itemprint(f"Input String:{string}-> Substring:{get_substring_betw
如果find()函数在字符串中找不到匹配的子字符串,它将返回-1。要解决这个问题,你可以在使用find()函数之前先使用in关键字进行检查,以确保子字符串存在于字符串中。以下是一个示例: string = "Hello, World!" substring = "lo" if substring in string: index = string.find(substring) print(f"Substring fo...
find() Return Value Thefind()method returns an integer value: If the substring exists inside the string, it returns the index of the first occurence of the substring. If a substring doesn't exist inside the string, it returns-1. Working of find() method Working of Python string's find()...
"Python" 的位置 index_in_range = my_string.find("Python", 0, 25) print(f"The substring 'Python' within range [0, 25) is found at index: {index_in_range}") # 查找不存在的子字符串 "Java" 的位置 index_not_found = my_string.find("Java") print(f"The substring 'Java' is not ...
substring = "world" # 在整个字符串中查找子串 index_full = text.find(substring) print("Index in full string:", index_full) # 输出: Index in full string: 7 # 从特定位置开始查找子串 index_from_5 = text.find(substring, 5) print("Index starting from index 5:", index_from_5) # 输出...
/Users/llq/PycharmProjects/pythonlearn/pythonlearn/.venv/bin/python/Users/llq/PycharmProjects/pythonlearn/pythonlearn1/find.pyTraceback(most recent call last):File"/Users/llq/PycharmProjects/pythonlearn/pythonlearn1/find.py",line12,in<module>result=info.index('ok')ValueError:substring not found...
unt三个函数,分a = 'hello accountant'# Use the upper function to convert the string to uppercasea_upper = a.upper()print(a_upper) # Output: 'HELLO ACCOUNTANT'# Use the find function to find the index of a substring in the stringindex = a.find('accoun')print(index) ...
Python String find() The find() method returns the lowest index of the substring if it is found in given string. If its is not found then it returns -1. Syntax : str.find(sub,start,end) Parameters : sub :It’s the substring which needs to be searched in the given string....
/Users/llq/PycharmProjects/pythonlearn/pythonlearn/.venv/bin/python/Users/llq/PycharmProjects/pythonlearn/pythonlearn1/find.py Traceback(mostrecentcalllast): File"/Users/llq/PycharmProjects/pythonlearn/pythonlearn1/find.py",line12,in<module> result=info.index('ok') ValueError:substringnotfound ...
以下是一个Python中的"find"函数示例: ```python string = "Hello, world!" substring = "world" position = string.find(substring) print("The position of 'world' in the string is:", position) ``` 输出: ```python The position of 'world' in the string is: 7 ``` 在这个例子中,我们...