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Python使用中常见问题总结（四）

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尊敬的读者您好：笔者很高兴自己的文章能被阅读，但原创与编辑均不易，所以转载请必须注明本文出处并附上本文地址超链接以及博主博客地址：https://blog.csdn.net/vensmallzeng 。若觉得本文对您有益处还请帮忙点个赞鼓励一下，笔者在此感谢每一位读者，如需联系笔者，请记下邮箱：zengzenghe@gmail.com，谢谢合作！一、字符串中插入字符串原始表all_available_features_plus_new.txt结构：用户id \001 特征...\001特征...特征 \001 label 问题：在原始特征表all_available_features_plus_new.txt中追加特征，即在label前一个特征后插入待追加特征。 with open("all_available_features_plus_new.txt", 'r', encoding='utf-8') as f: lines = f.readlines() lines_new = "" for line in lines: line_tmp = "" line_cut = line.split('\001') l1 = len(line.strip()) #获取所有待加入特征，并拼接成字符串line_tmp for i in user_time_new[line_cut[0

JAVA What am I doing wrong, I want the line [closed]

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问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . I am trying to make a change log and so I need a single line between some sentences. All I have is this but it doesn't seem to work. Can anyone help me please? @Test public void addLine() { File temp; try { temp = File.createTempFile("app.log", ".tmp", new File(".")); File appLog = new File("app

JAVA What am I doing wrong, I want the line [closed]

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How to Remove line if word exists? (PHP)

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问题 Hey, I want to remove the whole line if a word exists in it? through PHP? Example: hello world, this world rocks . What it should do is: if it finds the word hello it should remove the whole line. How can i do that and there could be words in between brackets and inverted commas also. Thanks. 回答1: If you have an array of lines like so $lines = array( 'hello world, this world rocks', 'or possibly not', 'depending on your viewpoint' ); You can loop through the array and look for the word

Not recognized command everytime in the first line of a code

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问题 I have a problem with my BATCH file... Whatever is written on the first line, it says: [command] is not a command. Like so: @ECHO OFF I get this output: [C:\folder (path)]>´╗┐@ECHO OFF ´╗┐@ECHO is not a command It does the same even in a clear batch file(nothing except @ECHO OFF in it). Please help! 回答1: You are seeing the BOM (Byte Order Mark) of the file, probably utf-8 encoded. Open with an editor and save the file with ANSI encoding. 来源： https://stackoverflow.com/questions/28836113/not

How to draw line automatically by reading coordinates from file?

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问题 I am trying to draw line with arrow at one end. Also I need to do it automatically for multiple arrows in the same plot. d3.csv("/data/coordinates.csv").then(function(data) { d.x1= +d.x1; d.y1= +d.y1; d.x2= +d.x2; d.y2= +d.y2; }); so input will be like x1,y1,x2,y2 1,2,3,2 3,3,5,4 5,3,6,3 7,5,7,5 8,6,8,6 9,7,2,8 var xoneValue = function(d) { return d.x1;}, xoneMap = function(d) { return xoneValue(d);}; var yoneValue = function(d) { return d.y1;}, yoneMap = function(d) { return yoneValue(d);};

Plotting a line between two points in gnuplot

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问题 I have a csv file with a following format having four columns (as a MWE ): xcoord1,ycoord1,xcoord2,ycoord2 0.1,0.2,0.4,0.3 0.5,0.3,0.7,0.5 I want to plot a line from each xcoord1,ycoord1 to xcoord2,ycoord2 using gnuplot. For example in this case, I would draw two lines from 0.1,0.2 to 0.4,0.3 and 0.5,0.3 to 0.7,0.5 . How is it possible? 回答1: one solution would be to preprocess your file and generate a Gnuplot script which would employ the set arrow command. Alternatively one can plot the

好看的人Debug 的一天

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问题1: File "train.py", line 144, in <module> main() File "train.py", line 105, in main templete_model = models.init_model(args.Backbone,input_tensor) File "/mnt/ailab_data/17_bk/wsw/bcs_project/code/BCS-tf/kerasbcs/models/__init__.py", line 25, in init_model return __model_factory[name](*args, **kwargs) File "/mnt/ailab_data/17_bk/wsw/bcs_project/code/BCS-tf/kerasbcs/models/Efficientnet.py", line 20, in Efficientnet_all x = GlobalAveragePooling2D()(x) File "/home/ailab/anaconda3/envs/tf1.14/lib/python3.6/site-packages/tensorflow/python/keras/engine/base_layer.py", line 663, in __call__ inputs,

DeBug Python神级工具PySnooper

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安装 pip3 install pysnooper import pysnooper @pysnooper.snoop() def number_to_bits(number): if number: bits = [] while number: number, remainder = divmod(number, 2) bits.insert(0, remainder) return bits else: return [0] number_to_bits(6) 返回日志 Starting var:.. number = 6 21:14:32.099769 call 3 @pysnooper.snoop() 21:14:32.099769 line 5 if number: 21:14:32.099769 line 6 bits = [] New var:....... bits = [] 21:14:32.099769 line 7 while number: 21:14:32.099769 line 8 number, remainder = divmod(number, 2) New var:....... remainder = 0 Modified var:.. number = 3 21:14:32.099769 line 9 bits.insert(0,

javafx drawing lines and text

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问题 I've got a problem with drawing lines in JavaFx. We're making an application simulating traffic - there are 16 streets, and every street has a different color dependent on traffic. There is a very simple picture: http://img546.imageshack.us/img546/9949/uliceu.jpg My first idea on how to do this was to draw streets as lines and simply change its colors. But I cant put a text on the line (I want a text with a street name). So I tried to put a line and a text on the StackPane. Then I added that