>>> a=23414>>> a += 123>>> a23537## >>> prompt = "If you tell us who you are, we can personalize the messages you see.">>> prompt += "\nWhat is your f ...
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其他好文 时间:
2018-04-02 23:51:10
阅读次数:
218
一、读写文件 1. 打开文件: open(filename, mode)。 mode有如下几种模式,默认为只读(r)。 2. 写入文件 3. 读取文件 4. 移动文件位置 f.tell() 返回文件对象当前所处的位置, 它是从文件开头开始算起的字节数。 f.seek() 改变文件当前的位置, 语法: ...
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编程语言 时间:
2018-03-27 14:31:22
阅读次数:
150
Pop Sequence Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, ..., N and pop randomly. You are supposed to tell ...
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其他好文 时间:
2018-03-22 01:35:12
阅读次数:
145
I am trying to do this [see below], and it is throwing error. Exception: Solution: It's not valid JSON, but you can tell Jackson to allow it. Here's h ...
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编程语言 时间:
2018-03-11 19:29:20
阅读次数:
1043
Most of times, we need 'alt' to the images, so it can tell the screen reader what is this image about. But sometimes, we can leave alt="", make alt to ...
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Web程序 时间:
2018-03-11 12:05:03
阅读次数:
179
This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students. Inp ...
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其他好文 时间:
2018-03-09 14:08:24
阅读次数:
155
In a forest, each rabbit has some color. Some subset of rabbits (possibly all of them) tell you how many other rabbits have the same color as them. Th ...
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其他好文 时间:
2018-03-02 22:06:09
阅读次数:
221
GIT 中提示 please tell me who you are 如果使用git过程中出现了,please tell me who you are ,需要设置一下使用者的身份。 1.git config user.name "username" 2.git config user.email " ...
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其他好文 时间:
2018-02-23 19:02:13
阅读次数:
166
变量.tell()和变量.seek()的用法:a=open(‘f_file‘)读的方式打开文件a.tell()查看光标在文件里的位置0a.readline()读一行‘thisis0line\n‘a.tell()查看光标在文件里的位置(字母一个位置)15a.readline()读一行‘thisis1line\n‘a.tell()查看光标在文件里的位置3
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其他好文 时间:
2018-02-21 14:32:22
阅读次数:
207
文件基本操作2:tell、seek遍历方法之一:迭代器Readlines方法缺点:readlines是把文件变成列表形式存入内存里面,如果文件很大,一下子全部变成列表,系统负担太重,所以readlines不常使用。#-*-coding:utf-8-*-__author__=‘xiaojiaxin‘__file_name__=‘file3‘#Readlines方法缺点:readlines是把文件变成
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编程语言 时间:
2018-02-08 16:31:09
阅读次数:
190