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...
上面的代码中,我们首先定义了一个字符串string和一个字符char,然后使用in关键字判断char是否存在于string中。如果存在,则打印"Character found in the string",否则打印"Character not found in the string"。 方法二:使用find方法 除了使用in关键字外,还可以使用字符串的find方法来判断一个字符是否存在于字符串中。...
string = "Hello World" char = "a" 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...
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...
my_list=["apple","banana","orange","grape"]deffind_character_in_list(char,lst):forstringinlst:ifcharinstring:print(f"Found '{char}' in '{string}'")# 调用函数并传入特定字符和列表find_character_in_list("a",my_list) 在上面的示例中,我们定义了一个函数find_character_in_list(),它接...
【Python】python之Character string 1、python字符串 字符串是 Python 中最常用的数据类型。我们可以使用引号('或")来创建字符串,l Python不支持单字符类型,单字符也在Python也是作为一个字符串使用。 >>> var1 = 'hello python' #定义字符串 >>> print(var1[0]) #切片截取,从0开始,不包括截取尾数...
func main() {var word []bytebuf := make([]byte, 64*1024)counts := make(map[string]*int)for {// Read input in 64KB blocks till EOF.n, err := os.Stdin.Read(buf)if err != nil && err != io.EOF {fmt.Fprintln(os.Stderr, err)os.Exit(1)if n == 0 {break ...
Python provides the built-in string (str) data type to handle textual data. Other programming languages, such as Java, have a character data type for single characters. Python doesn’t have that. Single characters are strings of length one. In practice, strings are immutable sequences of char...
Return True if the string is an alpha-numeric string, False otherwise. A string is alpha-numeric if all characters in the string are alpha-numeric and there is at least one character in the string. """ pass def isalpha(self, *args, **kwargs): # real signature unknown ...
1.find()表示查找指定字符串在整个字符串中第一次出现的位置，返回的是下标，若未找到返回-1 str1 =...