# Define a function to return the alphabet position of each letter in a given string def test(text): # Use a list comprehension to generate a list of alphabet positions for each alphabetic character # Convert each character to lowercase and use the ord function to get its ASCII value, # ...
import res = "The quick brown fox jumps over the lazy dog."# 使用正则表达式查找单词 "fox"match = re.search(r"\bfox\b", s)if match: print(f"Found 'fox' at position {match.start()}") # 输出：Found 'fox' at position ¾# 查找所有以 "the" 开头的单词matches = re.findall(...
Strings can beconcatenatedto build longer strings using the plus sign and also they can bemultipliedby a number, which results in the continuous repetition of the string as many times as the number indicates. Also, if we want to find out thelengthof the string, we simply have to use thelen...
# 定义原字符串original_string="Hello, World!"# 确定插入位置,例如在第5个索引位置插入insert_position=5# 定义要插入的新字符串new_string=" Beautiful"# 切分字符串为前半部分和后半部分first_part=original_string[:insert_position]# 从开始到插入位置second_part=original_string[insert_position:]# 从插入...
下面是一个简单的类图,展示了一个名为StringPosition的类,用于逐个输出字符串的位置。 StringPosition- str: str+__init__(s: str)+output_positions() 参考代码 classStringPosition:def__init__(self,s):self.str=sdefoutput_positions(self):foriinrange(len(self.str)):print("字符",self.str[i],"的...
#if len(string) % 2 == 1: # result = string[position] #else: #result = string[position - 1] + string[position] 编程实战和练习 #下面的程序演示了字符串处理算法。 #该程序读取一个包含被测人员对另外一个多项选择考试的答案的字符串,然后划分等级 ...
Return True if the string ends with the specified suffix, otherwise return False. suffix can also be a tuple of suffixes to look for. With optional start, test beginning at that position. With optional end, stop comparing at that position. ...
print(position, string) ... 0 str1 1 str2 2 str3 >>> enumerate还可以任意指定起始数值。 >>> list1 = ['str1', 'str2', 'str3'] >>> for position, string in enumerate(list1,100): ... print(position, string) ... 100 str1 101 str2 102 str3 >>> 上面是用迭代的方式一个一...
Character binstringabcdefispresent at2No such charater availableinstringxyze 方法#3:Using index() 如果字符不存在,则此方法引发ValueError # Python3 code to demonstrate # to find first position of character #ina givenstring# Initialisingstringini_string1='xyze'# Character to find ...
word ='Python'word[0]# Character in position 0. 输出为: Output 'P' 指定其他索引值来返回该位置中的字符: Python word[5]# Character in position 5. 输出为: Output 'n' 索引也可以是负数,表示计数从字符串的末尾开始。 由于 -0 相当于 0,因此负索引从 -1 开始: ...