find(s, *args) find(s, sub [,start [,end]]) -> in 寻找字符串从start到end间,sub是否出现过。出现过则返回出现的位置,否则返回-1 index(s, *args) index(s, sub [,start [,end]]) -> int 寻找字符串从start到end间,sub是否出现过。出现过则返回出现的位置,否则报错 join(words, sep=' ')...
字符串修改-填充或清除:center、ljust、rjust、zfill、strip、rstrip、lstrip 字符串查找替换:count、find、rfind、index、rindex、replace 字符串连接(join) join允许我们使用特定的字符来连接字符串。直接看例子吧: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 In[7]:lst=['i','am','lavenliu']In[8]...
Since the end index is out of range, Python returns an empty string.text = "Lorem Ipsum" substring = text[15:20] print(substring) Example In this example, we're trying to slice a substring from the index −5 to 15. Negative indices in Python count from the end of the string, so...
S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation. Return -1 on failure. s.find('peach',8)# 从index 7 开始往后找 1...
) | S.format_map(mapping) -> str | | Return a formatted version of S, using substitutions from mapping. | The substitutions are identified by braces ('{' and '}'). | | index(...) | S.index(sub[, start[, end]]) -> int | | Return the lowest index in S where substring ...
index("n", 5, 13)) ^^^ ValueError: substring not found 0 11 -1 0 (2)检索字符串包含目标字符串的次数 count 函数用于查找目标字符串在另一字符串中出现的次数,指定 start 和 end 的范围(顾头不顾尾),如果检索的字符串不存在,则返回 0,否则返回出现的次数,语法格式为:str.count(sub, start, end...
Create Substring from Index to End To create a substring from a specific index to the end, see the following example: quote = "Toto, I have a feeling we're not in Kansas anymore." print(quote[43:]) print(quote[-8:])Copy In both cases, the code printsthe end of a string after ...
S.find(sub[, start[, end]]) -> int #在字符串里查找指定的子串,未找到时返回-1,找到则返回子串在字符串中的索引值 Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional ...
def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ """ S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional ...
find() 方法:S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, such that sub is contained within S[start:end]. Optional arguments start and end are interpreted as in slice notation.