Return the lowest index in the string where substring sub is found, such that sub is contained in the range [start, end]. Optional arguments start and end are interpreted as in slice notation. Return -1 if sub is not found. str.format(format_string, *args, **kwargs) Perform a string...
54 55 """ 56 return (sep or ' ').join(x.capitalize() for x in s.split(sep)) 57 58 59 # Construct a translation string 60 _idmapL = None 61 def maketrans(fromstr, tostr): 62 """maketrans(frm, to) -> string 63 64 Return a translation table (a string of 256 bytes long) ...
| Return S centered in a string of length width. Padding is | done using the specified fill character (default is a space) | | count(...) | S.count(sub[, start[, end]]) -> int | | Return the number of non-overlapping occurrences of substring sub in | string S[start:end]. O...
如果指定开始和结束范围,则检查指定范围内,如果包含子字符串返回开始的索引值,否则返回-1) """ S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, (返回找到substring子的字符串中最低索引,这样的...
s = 'hello,hello' print(s.index('lo'))#3 print(s.find('lo'))#3 print(s.rindex('lo'))#9 print(s.rfind('lo'))#9 # print(s.index('k'))#ValueError: substring not found print(s.find('k'))#-1 # print(s.rindex('k'))#ValueError: substring not found print(s.rfind('k'...
=-1elseprint('find nock failed')Traceback(most recent call last):File"",line1,in<module>print('find nock ok')ifmsg.rindex('nock')!=-1elseprint('find nock failed')ValueError:substring not found
In [4]: 1ina Out[4]: True In [5]: 4notina Out[5]: True 序列类型转换 In [6]: list('Hello') Out[6]: ['H', 'e', 'l', 'l', 'o'] In [7]: tuple('Hello') Out[7]: ('H', 'e', 'l', 'l', 'o') In [9]: ...
1. Python数据类型(6个) 1.1 数值型(number) 1.2 字符型(string) 字符串常用方法 转义字符 可迭代性 f-string 1.3 列表(list) 1.4 字典(dictionary) 1.5 集合(set) 1.6 元组(tuple) 1.7 内存视图Memoryview 2. 动态引用、强类型 3. 二元运算符和比较运算 4. 标量类型 5. 三元表达式 ...
Thestr.replace()method can take an original string and return an updated string with some replacement. Let’s say that the balloon that Sammy had is lost. Since Sammy no longer has this balloon, we will change the substring"has"from the original stringballoonto"had"in a new string: ...
看起来这个问题没有官方的支持，但有一个内置的包可能会有所帮助：－－－Ｓｏｎｇｓ－－－ ｜ ...