extraction | 易学教程

How to make a Java Program unextractable

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问题 Sorry I am not very sure how to state the question title. My problem is like this, I had developed a Java program, and I wish to distribute it to my friends. So I export it to Jar file, but I don't want them to extract the jar file to view the code. Is there anyway to make the program so that nobody can get the source code instead just launch the program. 回答1: You appear to be confusing the installation application with the executable. And I also think you are confusing a java jar application

How do I list contents of a gz file without extracting it in python?

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问题 I have a .gz file and I need to get the name of files inside it using python. This question is the same as this one The only difference is that my file is .gz not .tar.gz so the tarfile library did not help me here I am using requests library to request a URL. The response is a compressed file. Here is the code I am using to download the file response = requests.get(line.rstrip(), stream=True) if response.status_code == 200: with open(str(base_output_dir)+"/"+str(current_dir)+"/"+str(count)+"

What Is The Best Python Zip Module To Handle Large Files?

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EDIT: Specifically compression and extraction speeds. Any Suggestions? Thanks So I made a random-ish large zipfile: $ ls -l *zip -rw-r--r-- 1 aleax 5000 115749854 Nov 18 19:16 large.zip $ unzip -l large.zip | wc 23396 93633 2254735 i.e., 116 MB with 23.4K files in it, and timed things: $ time unzip -d /tmp large.zip >/dev/null real 0m14.702s user 0m2.586s sys 0m5.408s this is the system-supplied commandline unzip binary -- no doubt as finely-tuned and optimized as a pure C executable can be. Then (after cleaning up /tmp;-)...: $ time py26 -c'from zipfile import ZipFile; z=ZipFile("large.zip");

Extracting columns containing a certain name

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问题 I'm trying to use it to manipulate data in large txt-files. I have a txt-file with more than 2000 columns, and about a third of these have a title which contains the word 'Net'. I want to extract only these columns and write them to a new txt file. Any suggestion on how I can do that? I have searched around a bit but haven't been able to find something that helps me. Apologies if similar questions have been asked and solved before. EDIT 1: Thank you all! At the moment of writing 3 users have

Function names extraction from static library

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I have a static library static_library.a How to list functions and methods realized there. or at least how to look is there concrete function 'FUNCTION_NAME' realized? Write nm static_library.a This gives you complete list of symbols in the library. frankc Use nm <library> as mentioned. If this is a library built from C++ you should use the nm --demangle option to get back the original symbol names rather than their "mangled" versions. 来源： https://stackoverflow.com/questions/2714287/function-names-extraction-from-static-library

Extract pixel values by points and convert to a table in Google Earth Engine

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I am undertaking a project that is relating field measurements of fire severity to band values and spectral indices derived from Landsat imagery before and after the fire. I am currently using Google Earth Engine to extract surface reflectance values from a collection of Landsat images. The approach I am using imports my field site locations (point data) as a feature collection and uses the getRegion function to extract band values from a Landsat image collection at each point. The code is provided below: //IMPORT SAMPLE POINTS var pts = ee.FeatureCollection('ft:1N9Hb01uCSHqGpz262K

How to extract a fixed number of frames with ffmpeg?

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I am trying to extract a fixed number of frames uniformly from a bunch of videos(say 50 frames from each video, 10,000 videos in total). Since the duration varies, I calculated the ideal output fps for each video and take it as a parameter for ffmpeg extraction, but failed to get the required number of frames. Does anyone know how to extract a fixed number of frames with ffmpeg, or other tools? Thanks! You could use the thumbnail filter. It picks one representative frame from every set of n frames (default is 100) So, if your source video is 10 minutes long and at 25 fps, then it has 15000

How to parse/extract data from a mediawiki marked-up article via python

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问题 Source Mediawiki markup Right now I'm using a variety of regexes to "parse" the data in the mediawiki mark-up into lists/dictionaries, so that elements within the article can be used. This is hardly the best method, as the number of cases that have to be made are large. How would one parse an article's mediawiki markup into a variety of python objects so that the data within can be used? Example being: Extract all headlines to a dictionary, hashing it with its section. Grab all interwiki

How to extract data from a PDF?

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My company receives data from an external company via Excel. We export this into SQL Server to run reports on the data. They are now changing to PDF format, is there a way to reliably port the data from the PDF and insert it into our SQL Server 2008 database? Would this require writing an app or is there an automated way of doing this? It all depends on how they've included the data within the PDF. Generally speaking, there's two possible scenarios here: The data is just a text object within a PDF. You'll need to use a tool to extract the text from the PDF then insert it into your database.

Keyword extraction software [closed]

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Closed. This question is off-topic. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it's on-topic for Stack Overflow. I am looking for a piece of software that, given some text, will extract the "meaningful" keywords. For example, in the sentence: StackExchange is an online community. I want "StackExchange" and "online community" to be singled out as semantically-meaningful keywords, but not "is" or "an". A bit of research led to Alchemy API , which does the job well. Are there other solutions out there, especially open source ones?