character_to_find : b Character bispresent at2 方法2:Using find 如果字符不存在,则此方法返回-1 # Python3 code to demonstrate # to find first position of character #ina givenstring# Initialisingstringini_string='abcdef'ini_string2='xyze'# Character to find c="b"# printing initialstringand ...
deffind_character_position(string,target_char):forindex,charinenumerate(string):ifchar==target_char:returnindexreturn-1string=input("请输入要搜索的字符串:")target_char=input("请输入要查找的字符:")position=find_character_position(string,target_char)ifposition==-1:print("未找到目标字符")else:print...
方法一:使用find()方法 在Python中,字符串对象提供了find()方法来查找指定字符或字符串在文本中的位置。该方法返回指定字符或字符串第一次出现的索引值,如果未找到,则返回-1。 代码示例: string="Hello, world!"char="o"position=string.find(char)print("The position of '{}' in the string is: {}".f...
find()回报-1 和index()加薪ValueError。使用 find()>>> myString = 'Position of a character'>>...
Find character indices in string.Write a Python program to print the index of a character in a string.Sample Solution:Python Code:# Define a string 'str1'. str1 = "w3resource" # Iterate through the characters of the string using enumeration. # 'index' contains the position of the ...
make an acronym by taking the first letter of each word in a phrase. We can do that through an operation calledstring indexing.This operation lets us access the character in a given position or index using square brackets and the number of the position we want, as the example below shows...
a nice string representation of the object. | If the argument is a string, the return value is the same object. | | Method resolution order: | str | basestring | object | | Methods defined here: | | __add__(...) | x.__add__(y) <==> x+y | | __contains__(...) | x...
Please enter a character A-Z:A Aispresentinthelist Copy Methods to Find a String in a List 1. Using theinOperator (Fastest for Membership Testing) Theinoperator is the most straightforward way to check if a string is present in a list. It is also the fastest method for membership testin...
A string is alpha-numeric if all characters in the string are alpha-numeric and there is at least one character in the string. 'abc123'.isalnum() True 'abc123+'.isalnum() False ''.isalnum() False 9.10 str.isalpha()如果字符串中的所有字符都是字母,并且至少有一个字符,返回 True ,否则...
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 defisalpha(self, *args, **kwargs): # real signature unknown ...