str1 = "w3resource" # Iterate through the characters of the string using enumeration. # 'index' contains the position of the character, and 'char' contains the character itself. for index, char in enumerate(str1
word[-1]# Last character. 输出为: Output 'n' 同样地,其他负索引会从相应的位置返回字符: Python word[-2]# Second-to-last character. 输出为: Output 'o' 切片 Python 既支持索引,也支持切片,前者从字符串中提取单个字符,后者提取子字符串(或切片)。 若要进行切片,需采用“开始:结束”格式指示范围。
ascii:1 >>> print("str:%s"%'character string') #格式化字符串 str:character string >>> print("str:%d"%888) #格式化整数 str:888 >>> print("str:%f"%888) #格式浮点数 str:888.000000 >>> print("str:%e"%888) #格式化科学计数浮点数 str:8.880000e+02 >>> print("str:%E"%888) #同上...
In addition, we canaccess just a specific characteror aslice of charactersof a string. We might want to do this, for example, if we have a text that’s too long to display and we want to show just a portion of it. Or if we want to make an acronym by taking the first letter of...
s="abcdefgh"#1、a rangeofcharacters 取一段字符print(s[0:3])#abcprint(s[1:3])#bcprint("---")print(s[2:3])#cprint(s[3:3])#None #2、withdefaultparameters 缺省参数print(s[3:])#defghprint(s[:3])#abcprint(s[:])#abcdefghprint("---")#3、witha step parameter 步长print(...
string ='Aereplane'index =3new_chr ='o'chng_str =list(string) chng_str[index] = new_chr string ="".join(chng_str)print(string)#Aeroplane Conclusion: In this short post, we have learned about how we can change any character in a string using its index with the help of python....
string="Hello, world!"char="o"try:position=string.index(char)print("The position of '{}' in the string is: {}".format(char,position))exceptValueError:print("The string does not contain the character '{}'.") 1. 2. 3. 4.
"" logging.info("Set the next startup saved-configuration file " "to {}...".format(file_path)) uri = '/restconf/operations/huawei-cfg:set-startup' req_data = '' if exportcfg is not None: exportcfg_change = ops.opscharacterEncode(exportcfg) items = {'filename': file_path, '...
标识符中有无效字符(invalid character in identifier) 代码中出现了无法识别的字符,检查一下是否有多余字符或者中文字符。 检查到不完整的字符串(EOL while scanning string litera) 很多情况下是由于字符串两边的引号不统一。 错误示例 print('hello','world') ...
Return a left-justified string of length width. Padding is done using the specified fill character (default is a space). 返回长度为width的左对齐字符串。 使用指定的填充字符(默认为空格)填充。 """ pass def lower(self, *args, **kwargs): # real signature unknown ...