line | 易学教程

用python读取csv信息并写入新的文件

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import csv fo = open("result.txt", "w+") reader = csv.reader(open('test.csv')) for line in reader: Name = line[0] fo.writelines(['class ',Name,'{\n']) fo.writelines('};\n') fo.close() 来源： https://www.cnblogs.com/rednodel/p/11359020.html

Matplotlib练习

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fig, ax = plt.subplots(figsize=(12,6)) x = np.linspace(0, 5, 10) # # line 1 -- line 4 ，线形图，蓝色线，线宽分别为 0.25 ，0.50 ， 1.00 ，2.00 ax.plot(x, x+1, color='b', linewidth=0.25) ax.plot(x, x+2, color='b', linewidth=0.50) ax.plot(x, x+3, color='b', linewidth=1.00) ax.plot(x, x+4, color='b', linewidth=2.00) # line 5 -- line 8 ，线形图，红色，线宽为2 ，线型（linestyle=）分别为 ‘-‘ ,‘-.’, ‘:’, ‘steps’ ax.plot(x, x+5, color='r', linewidth=2, linestyle= '-' ) ax.plot(x, x+6, color='r', linewidth=2, linestyle= '-.') ax.plot(x, x+7, color='r', linewidth=2, linestyle= ':') ax.plot(x, x+8, color='r', linewidth=2, linestyle= 'steps'

make line that connects two objects in silverlight

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问题 how can I connect these entity boxes? the boxes are created by clicking a button and they can be dragged. Now I want to connect them with a line or something. 回答1: Here is a quick and dirty implementation: the class that represents the connection: public partial class Connection { public MyBox Box1 { get; set; } public MyBox Box2 { get; set; } public Line Line { get; set; } } To create a new connection I've used a basic form: name of source, destination and a button: <StackPanel Orientation=

How to cat two files after each other but omit the last/first line respectively?

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问题 I have two files I want to cat together. However, the last line of the first file and the first line of the last file should be omitted. I am sure this can be done in a UNIX shell (or rather, Cygwin). But how? 回答1: $ head --lines=-1 file1 > res $ tail --lines=+2 file2 >> res 回答2: you can use: head -n -1 file1 && tail -n +2 file2 head shows the first lines of a file, the param -n shows the first n lines of the file, but if you put a - before the number, it shows all the file except the last n

Line tracking with MATLAB

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问题 I have an image and I want to covert it to logical image includes the line is black and background is white. Of course, it is possible to make that with using threshold method but I don't want to do that by using this way. I want to detect it by using a line tracking method or sometihing like that. It is about retina vessels detection. I found an article about it but I don't know the way of creating a Dynamic search window. How can I do that? Original image: Tracking way: I prepared images

Diff algorithms

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问题 Can somebody recommend some papers (literature) or code snippets about tree-based diff algorithms for XML (based on the DOM-tree) Thank you very much. 回答1: Here is one useful paper on the same : http://pdf.aminer.org/000/301/327/x_diff_an_effective_change_detection_algorithm_for_xml_documents.pdf Here is one tool you can experiment with: http://www.cs.hut.fi/~ctl/3dm/ You may find the Java source for the above tool as well which maybe of great use. 来源： https://stackoverflow.com/questions

Richtextbox draw an rtf line

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问题 I want to add a horizontal line to the RichTextBox as a delimiter of my text. I've found some examples of RTF code implementing a line and tried them in that way: rtbResFile.Rtf = @"{\rtf1{\pard some text.\par}{\pard \brdrb \brdrs \brdrw10 \brsp20 \par}{\pard \par}{\pard some other text.\par}}"; This way implements creating a blank paragraph with border, so that should looks like a line. However it doesn't show anything. Just a blank paragraph. Even if I try to implement it in the way include

安装selenium遇到问题：pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.

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C:\Users\xiuwe\AppData\Local\Programs\Python\Python37\Scripts>pip install selenium Collecting selenium Downloading https://files.pythonhosted.org/packages/80/d6/4294f0b4bce4de0abf13e17190289f9d0613b0a44e5dd6a7f5ca98459853/selenium-3.141.0-py2.py3-none-any.whl (904kB) |██ | 61kB 1.6kB/s eta 0:08:43ERROR: Exception: Traceback (most recent call last): File "c:\users\xiuwe\appdata\local\programs\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 360, in _error_catcher yield File "c:\users\xiuwe\appdata\local\programs\python\python37\lib\site-packages\pip\_vendor\urllib3

#line使用分析

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文章目录 1 #line使用分析 1.1 #line的用法 1 #line使用分析 1.1 #line的用法 #line用于强制指定新的行号和编译文件名，并对源程序的代码重新编号。用法： #line的编译指示字的本质是重定义__LINE__和__FILE__ 。参考资料： C语言进阶剖析教程来源： CSDN 作者： SlowIsFastLemon 链接： https://blog.csdn.net/SlowIsFastLemon/article/details/103756505

line and circle intersection [duplicate]

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问题 This question already exists : Closed 7 years ago . Possible Duplicate: intersection of line and circle with different slope I have line which plotted by pp=randi([-400 400],2,2) then x=pp(:,1) and y=pp(:,2) . I have a circle with centre (a,b) with radius r I want to check the intersection point of circle and the line. I have used polyfit command to check the slope and intercept. Then I used lincirc command but the problem is if the line crosses only one point then the other point is also