函数re.split() 是非常实用的,因为它允许为分隔符指定多个正则模式。 比如,在上面的例子中,分隔符可以是逗号,分号或者是空格,并且后面紧跟着任意个的空格。 只要这个模式被找到,那么匹配的分隔符两边的实体都会被当成是结果中的元素返回。 返回结果为一个字段列表,这个跟 str.split() 返回值类型是一样的。 2. ...
string = 'Twelve:12 Eighty nine:89 Nine:9.' pattern = '\d+'# maxsplit = 1# split only at the first occurrence result = re.split(pattern, string, 1) print(result)# 输出: ['Twelve:', ' Eighty nine:89 Nine:9.'] 顺便说一下,maxsplit默认值为0;默认值为0。意味着拆分所有匹配的结果。
>>> data = bytearray(b'Hello World') >>> data[0:5] bytearray(b'Hello') >>> data.startswith(b'Hello') True >>> data.split() [bytearray(b'Hello'), bytearray(b'World')] >>> data.replace(b'Hello', b'Hello Cruel') bytearray(b'Hello Cruel World') >>> 1. 2. 3. 4. ...
rpartition(sep) str.swapcase() # Split the string at the first occurrence of sep, and return a 3-tuple containing the part before the separator, the separator itself, and the part after the separator. If the separator is not found, return a 3-tuple containing the string itself, followed ...
Split the string only at the first occurrence: importre txt ="The rain in Spain" x = re.split("\s",txt,1) print(x) Try it Yourself » The sub() Function Thesub()function replaces the matches with the text of your choice: ...
有了这个,我们可以警告用户,如果st_size属性不等于目标文件的大小。os.path()模块还可以获取绝对路径,检查它是否存在,并获取父目录。我们还可以使用os.path.dirname()函数或访问os.path.split()函数的第一个元素来获取父目录。split()方法更常用于从路径中获取文件名:...
Split the string at the first occurrence of sep, and return a 3-tuple containing the part before the separator, the separator itself, and the part after the separator. If the separator is not found, return a 3-tuple containing the string itself, followed by two empty strings. ...
split([delim]) # Split string into list of substrings s.startswith(prefix) # Check if string starts with prefix s.strip() # Strip leading/trailing space s.upper() # Convert to upper case 字符串的可变性 字符串是“不可变的”或者说是只读的。一旦创建,字符串的值就无法修改。 >>> s = ...
split("|", maxsplit=1) ['Rubber duck', '5|10'] This is especially handy when you only care about the first or the first couple occurrences of a separator within a string.Splitting from the end of a stringIf it's the last couple occurrences of a separator that you care about, you...
split(): case ["go", direction]: return f"Moving {direction}" case ["pick", "up", item]: return f"Picking up {item}" case ["quit"]: return "Quitting" case _: return "Unknown command"Exception Groups (Python 3.11+)Exception Groups provide a way to handle multiple exceptions ...