由于Python中的字符串是属于不可变对象,不支持原地修改 但是我们有时候确实需要进行原地修改的时候也可以使用io.StringIO对象或array 模块进行修改 例如: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>importio>>>s="hello, xiaoY">>>sio=io.StringIO(s)>>>sio<_io.StringIO object at0x02F462B0...
test_string='Python Programming'string_reversed=test_string[-1::-1]print(string_reversed)string_reversed=test_string[::-1]print(string_reversed)# String reverse logically defstring_reverse(text):r_text=''index=len(text)-1whileindex>=0:r_text+=text[index]index-=1returnr_textprint(string_re...
str.removeprefix(prefix, /) # 如果字符串以前缀字符串开头,返回string[len(prefix):]。否则,返回原始字符串的副本。 str.removesuffix(suffix, /) # 如果字符串以后缀字符串结尾,并且后缀非空,返回 string[:-len(suffix)]。 str.replace(old, new[, count]) # 返回字符串的副本,其中出现的所有子字符串o...
'index', 'index_error', 'join', 'joinfields', 'letters', 'ljust', 'lower', 'lowercase', 'lstrip', 'maketrans', 'octdigits', 'printable', 'punctuation', 'replace', 'rfind', 'rindex', 'rjust', 'rsplit', 'rstrip', 'split', 'splitfields', 'strip', 'swapcase', 'translate',...
return ERR root_elem = etree.fromstring(rsp_data) namespaces = {'data':'urn:ietf:params:xml:ns:yang:ietf-restconf','cfg': 'urn:huawei:yang:huawei-cfg'} uriTmp = '{}'.format('/cfg/startup-infos/startup-info') uriTmp = uriTmp.replace('/', '/cfg:') mpath = uriTmp[1:] for...
Here, we will discuss two ways to replace any character in a string at a specific index using : The string slicing method The list() and join() method. Replace a character in a string using slice() in Python The string slicing method helps to return a range of characters from a string...
immutable_string="Accountability"# Assign a new element at index 0immutable_string[0]='B' 1. 2. 3. Output: 复制 ---TypeErrorTraceback(mostrecentcalllast)~\AppData\Local\Temp/ipykernel_11336/2351953155.pyin23# Assign a new element at index 0--->4immutable_string[0]='B'TypeError:'str...
()# 将大写的字母变为小写,小写的字母变为大写'THIS IS a GOOD dAY'>>>s.replace(' is',' is not')# s.replace(old, new, n),将old字符串替换为new,替换n次,n不写则默认全部替换'this is not A good Day'>>>s.replace('is','at',1)'that is A good Day'>>>s.replace('is','is ...
replace("a","@",4))# 全部替换结果: @-b-@-b-@-b-@-b# 从左往右替换结果1次: @-b-a...
uppercase_string = combined_string.upper() # 结果为 'HELLO, WORLD!' lowercase_string = combined_string.lower() # 结果为 'hello, world!' (8)字符串替换 使用replace()方法可以替换字符串中的子串。 replaced_string = combined_string.replace('World', 'Python') # 结果为 'Hello, Python!' (9...