因为python的read和write方法的操作对象都是string.而操作二进制的时候会把string转换成list进行解析,解析后重新写入文件的时候,还得转换成string. >>> import string >>> str = 'abcde' >>> list = list(str) >>> list ['a', 'b', 'c', 'd', 'e']>>> str 'abcde' >>>

String模块中的常量 >>> import string >>> string.digits ' >>> string.letters 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' >>> string.lowercase 'abcdefghijklmnopqrstuvwxyz' >>> string.printable '0123456789abc

string比较连接 >>> s1="python string" >>> len(s) 13 >>> s2=" python string2 " >>> s=s1+s2 >>> s 'python string python string2 ' >>> >>> cmp(s1,s2) 1 string 截取 >>> s1[0

JUNE 28TH, 2014Tweet This article describes how Python string interning works in CPython 2.7.7. A few days ago, I had to explain to a colleague what the built-in function intern does. I gave him the following example: >>> s1 = 'foo!' >>>

http://www.laurentluce.com/posts/python-string-objects-implementation/ Python string objects implementation June 19, 2011 This article describes how string objects are managed by Python internally and how string search is done. PyStringObject structu

Python string replace   方法 方法1: >>> a='...fuck...the....world............' >>> b=a.replace('.',' ') >>> print b    fuck   the    world 方法2: >>> a='...fuck...the....world............' >>> b=string.replace(a,'.',

原文链接:The internals of Python string interning 由于本人能力有限,如有翻译出错的,望指明. 这篇文章是讲Python string interning是如何工作的,代码基于CPython2.7.7这个版本. 前一段时间,我向同事解释了python的buil-in函数 intern背后到底做了什么.我给他看了下面这个例子: >>> s1 = 'foo!' >>> s2 = 'foo!' >>> s1 is s2

    最近在看python标准库这本书,第一感觉非常厚,第二感觉,里面有很多原来不知道的东西,现在记下来跟大家分享一下.     string类是python中最常用的文本处理工具,在python的标准库中,有大量的工具,可以帮助我们完成高级文本处理. capwords()是将一个字符串中的所有单词的首字母大写. import string s = 'The quick brown fox jumped over the lazy dog.' print s print string.capw

官网文档地址:https://docs.python.org/3/library/stdtypes.html#string-methods 官网 公号:软测小生ruancexiaosheng 文档里的所有String的方法都在下面,基于 Python 3.X 版本,截止日期是2017/10/12日,之后的可能会有更新.花了一天的时间学习并记录了一下 4.7.1. String Methods str.capitalize() --> String 返回字符串,其首字母大写,其余部分小写 1>&

python的read.write方法的操作对象都是string.输入.输出和逻辑业务上很多时候都要用到string.list互转. 1.简单用法 import stringstr = 'abcde'list = list(str)print list# ['a', 'b', 'c', 'd', 'e']str_convert = ''.join(list)print str_convert# 'abcde' 2.使用split()将一个字符串分裂成多个字符串组成的列表. str2 = "abc

string 包含用于处理文本的常量和类.string模块始于Python的最早版本. 2.0版本中, 许多之前只在模块中实现的函数被转移为string对象的方法. 之后的版本中, 虽然这些函数仍然可用, 但是不推荐使用, 并且在Python 3.0中将被去掉. string模块也包含了一些有用的常量和类来处理字符串和unicode对象, 后面的讨论会集中在这个方面. Functions string.capwords(s, sep=None):使用str.split()将参数分成单词,使用st

python 在 2.6之后支持了string的format功能, 很强大, 应该成为使用习惯. http://blog.csdn.net/handsomekang/article/details/9183303 http://blog.xiayf.cn/2013/01/26/python-string-format/

字符串操作 string典型的内置方法: count() center() startswith() find() format() lower() upper() strip() replace() split() join() count() 计数,查询字符串中出现指定字符的次数. st='hello kitty' print(st.count('l')) 输出:2 center() 字符串居中.其中,50表示新字符串长度,'#'表示填充字符. st='hello kitty' print(

4 down vote accepted You misunderstood what \xhh does in Python strings. Using \x notation in Python strings is just syntax to produce certain codepoints. You can use '\x61' to produce a string, or you can use 'a'; both are just two ways of saying gi

一,摘自官方API  https://docs.python.org/3/library/stdtypes.html#methods str.startswith(prefix[, start[, end]]) Return True if string starts with the prefix, otherwise return False. prefix can also be a tuple of prefixes to look for. With optional start, t

string.ascii_lowercase ='abcdefghijklmnopqrstuvwxyz' string.ascii_uppercase ='ABCDEFGHIJKLMNOPQRSTUVWXYZ' string.ascii_letters ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' string.digits ='0123456789' string.hexdigits ='0123456789abcdefABCD

python  字符串是不可变的. 字符串pool会对 t "looklike" Python identifiers 字符串做intern缓存.

l = map(chr, xrange(256)) #将ascii转为字符串 _idmap = str('').join(l) del l # Construct a translation string _idmapL = None #定义一个全局变量 def maketrans(fromstr, tostr): """maketrans(frm, to) -> string Return a translation table (a string of 256 by

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com'https://oj.leetcode.com/problems/string-to-integer-atoi/ Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please

def capwords(s, sep=None): """capwords(s [,sep]) -> string Split the argument into words using split, capitalize each word using capitalize, and join the capitalized words using join. If the optional second argument sep is absent or None