find()方法返回字符在字符串中的索引位置,如果不存在,则返回-1。我们可以判断返回值是否为-1来判断字符是否不在字符串中。下面是示例代码: character='a'string='Hello, World!'ifstring.find(character)==-1:print(f"The character '{character}' is not in the string.")else:print(f"The character '{c...
Python中的字符串类提供了一个find()方法,可以用于查找一个字符在字符串中的位置。如果找到了字符,则返回其在字符串中的索引值;如果找不到,则返回-1。可以通过以下方式使用: char='a'string='hello world'ifstring.find(char)!=-1:print(f'The character{char}is present in the string')else:print(f'The...
if char in string: print(f"The character '{char}' is found in the string.") else: print(f"The character '{char}' is not found in the string.") 输出结果将是:The character 'a' is not found in the string.,因为字符a并不存在于字符串中。 问题2:如何在Python中判断一个字符串是否包含...
res1=ini_string.find(c) res2=ini_string2.find(c)ifres1 == -1: print ("No such charater available in string {}".format( ini_string))else: print ("Character {} in string {} is present at {}".format( c, ini_string, str(res1+1)))ifres2 == -1: print ("No such charate...
Return S centered in a string of length width. Padding is done using the specified fill character (default is a space) 示例: >>> s = 'hello world' >>> s.center(30,'*') '***hello world***' ljust 返回长度为 width 的字符串,原字符串左对齐,后面填充fillchar 返回一个原字符串左对齐...
underlying string that was assigned to it before. We’re assigning a whole new string with different content. In this case, it was pretty easy to find the index to change as there are few characters in the string.How are we supposed to know which character to change if the string is ...
For example, imagine I wanted to ask, is the character y part of my string? 所以我可以输入y,我可以问,y在S中吗? So I can type in my y, and I can ask, is y in S? 答案将会是真的。 And the answer is going to be True. 如果我使用大写字母Y,答案将是错误的。 If I use capital...
Tesseract 是一个开源的 OCR(Optical Character Recognition)引擎,可以识别多种语言。以下是一个简单的示例代码: import pytesseract from PIL import Image # 打开图像文件 img = Image.open('screenshot.png') # 使用 Tesseract 识别图像中的文字 text = pytesseract.image_to_string(img) # 打印识别结果 print(...
在Python中,可以使用字符串的find()方法来查找指定字符。find()方法返回指定字符在字符串中第一次出现的位置,如果没有找到则返回-1。 以下是使用find()方法查找指定字符的示例: string = "Hello, World!" character = "o" index = string.find(character) if index != -1: print(f"The character '{...
for i, e in enumerate(s): if ord(e) > 128: print("^ ", end='') else: print(' ', end='') print() s = "【a, b,中" find_chinese_char(s) s = "([10, 2,3,4】“])" find_chinese_char(s) 如果经常受困于这些错误,建议阅读代码里面的中、英文符号 - 知乎 (zhihu.com)。