范例一: 练习:元素分类 有如下值集合 [11,22,33,44,55,66,77,88,99,90...],将所有大于 66 的值保存至字典的第一个key中,将小于 66 的值保存至第二个key的值中。 即: {'k1': 大于66 , 'k2': 小于66} 代码语言:js AI代码解释 #!/usr/bin/env pyton#coding:utf-8a=[11,22,33,44,55,66...
print(re.sub(re.compile('\D+'), '#', mobile)) split:切割 re.split(pattern, string, maxsplit=0, flags=0) str = '1998-09-10' print(re.split(re.compile(r'-'), str)) #['1998', '09', '10'] pattern = re.compile(r'\s+') split_result = pattern.split('This is a sentenc...
Reformat the single paragraph in 'text' so it fits in lines of no more than 'width' columns, and return a list of wrapped lines. By default, tabs in 'text' are expanded with string.expandtabs(), and all other whitespace characters (including newline) are converted to space. See Text...
For bytes corresponding to tab, newline, carriage return, and \, the escape sequences \t, \n, \r, and \\ are used. For every other byte value, a hexadecimal escape sequence is used (e.g., \x00 is the null byte). That is why in Example 4-2 you see b'caf\xc3\xa9': the...
MULTILINE) # Match <re.Match object; span=(4, 5), match='X'> 建立一个电话本 split() 将字符串用参数传递的样式分隔开。这个方法对于转换文本数据到易读而且容易修改的数据结构,是很有用的,如下面的例子证明。 首先,这里是输入。 它通常来自一个文件,这里我们使用三重引号字符串语法 代码语言:...
fp = open(‘c:\new\text.dat’,’w’) 问题是这有”\n“,他会识别为一个换行字符,并且”\t”会被一个制表符所替代,结果就是调用尝试打开一个名为c:(换行)ew(制表符)ext.dat的文件,而不是我们需要的结果。 这正是使用raw字符串所要解决的问题。如果字母r(大写或小写)出现在字符串的第一个引号的前...
利用三引号,你可以指示一个多行的字符串。你可以在三引号中自由的使用单引号和双 引号。例如: '''This is a multi-line string. This is the first line. This is the second line. "What's your name?," I asked. He said "Bond, James Bond." ''' ...
Prints the values to a stream, or to sys.stdout by default. Optional keyword arguments: file: a file-like object (stream); defaults to the current sys.stdout. sep: string inserted between values, default a space. end: string appended after the last value, default a newline. ...
Python String split is commonly used to extract a specific value or text from a given string. Python provides an in-built method called split() for string splitting. This tutorial will explain you all about Split in Python.
finditer(<regex>, text) # Returns all occurrences as match objects. Argument 'flags=re.IGNORECASE' can be used with all functions. Argument 'flags=re.MULTILINE' makes '^' and '$' match the start/end of each line. Argument 'flags=re.DOTALL' makes dot also accept newline. Use r'\1'...