I have a quite complex software system which was developed in ruby and has been now all "translated" and transported into python. The last thing which is left is a series of *.txt.erb templates. I would like to leave them as they are but have a python library which does what the old ruby routine was doing, that is creating a series of *.txt files which follow the *.erb templates structure. I have looked a lot around but I cannot find an answer.
Probably for a more expert python programmer this might be a simple question.
Thanks a lot for your help!
I've solved the problem changing the *txt.erb templates into *.txt files and I've coded a python script which reads the file and substitute the general variable into the specific variable I want to, for both file content and file name.
Thank you for the help!
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I'm doing python coding self study and not a programmer.. this is my first entry here. Not sure if this is doable, (I have a very little knowledge about programming) but here it is.
Is it possible to insert a file, like a template, for the user to download in a standalone program? Tried searching online but have not been successful, maybe I just don't know how to term it.
Any suggestion is very welcome.. thanks in advance..
When user clicks 'Download template', they can download an Excel template
User can download the template that I inserted in a program, that is if inserting file in a standalone program is possible.
I think what you are asking is if you can embed a file into the .py itself (which is what I think you mean when you are saying standalone), to which the answer is no. It might be possible to compile the program into an exe using pyinstaller, but not sure how efficient or feasible that is.
If you really need this to be only one .py, I would suggest hosting it somewhere online for free and having python download the file from the url.
If I am being honest, the best way to go about doing this is to ditch the "standalone program" requirement and just shipping the template in a zip file with the .py file.
Edit: Creating the file on-demand
This slipped my mind as an idea (probably because it is the most involved and difficult way to do it), but you may be able to use something like XSLX writer to create the excel file on demand. Would require you to code a function that makes a brand new excel file from scratch, but this would not require downloads, zip files, or an executable, so it would be truly standalone (minus the added pip dependency).
Be warned though, I think python and XLSX can be finicky at times.
I feel this question needs a better title and I will amend it if someone suggests something better. The problem is I'm not sure of the terminology of the feature that I'm using here.
The best way to describe my problem is to show what I've done. The project is here: https://github.com/jeffnyman/quendor
This project is setup so it can be executed as a module. For example, from the project root someone could do this:
python3 -m quendor
I also have a build script to generate an in-memory zip (if I'm using that terminology correctly):
https://github.com/jeffnyman/quendor/blob/master/build.py
That works in that if you run build.py it will generate a quendor.py file that executes the entire project. That worked fine up until I included other directories (like my utilities and zinterface).
With the project as it is in the repo right now, if you run the build (.\build.py) and then run the generated file:
./quendor.py
You get the following error:
File "./quendor.py/quendor/__main__.py", line 6, in <module>
ModuleNotFoundError: No module named 'quendor.zinterface'
So a key point: if all of my files are in the same directory (i.e., in quendor) this build script works fine in terms of producing an executable script file.
But once I include the subdirectories and files in those directories, things go south on me with the above error.
I'm sure all the files are being gathered. I handle that starting on line 18 (https://github.com/jeffnyman/quendor/blob/master/build.py#L18). And if you were to add to line 24 this statement:
print(f"* {file_path}")
You would see it outputs the following:
* quendor/__init__.py
* quendor/__version__.py
* quendor/zinterface/fileio.py
* quendor/utilities/messages.py
* quendor/__main__.py
So I'm suspecting it might have to do with the code where I write the string at line 28 (https://github.com/jeffnyman/quendor/blob/master/build.py#L28). I feel I have to do more to let the executable zipped script file know about the modules.
But I'm not sure if (1) I'm accurate and (2) even if I'm accurate, if that's possible. I'm finding I'm in a bit over my head here.
Any thoughts would be appreciated and I'm happy to update with any necessarily clarifications or terminology.
So it won't let me comment unless I have more reputation but I can post an answer. Even though I don't have an answer, but rather a comment. I think the above comment was not meant for your actual __main__.py file but rather the one that is getting generated in your quendor.py file. You might want to try adding the import statements to your packed string that you write.
For example, see what happens if on line 32 you add this: import quendor.zinterface.fileio as zio. (Don't replace the line that's there. Just put my line and then keep your others.) I'm not sure how the zip process works but if it tries to mirror the module process that should work. However, if it doesn't, that won't work. You might also just want to try doing import quendor.zinterface. By itself that won't work but it would be interesting to see if it gave you a different error.
Actually, it turns out I found a way to do this! It required using os.walk rather than os.listdir. This required taking a few ideas that people here discussed. Here is the script that does the trick:
https://github.com/jeffnyman/quendor/blob/master/build.py
You can compare that with my previous commit that was trying to handle this a different way.
Eldritch was right that I couldn't just flatten the directory nor could I just add imports to the string I was writing to the final zip file. Jean-François was correct that I had to focus on the __main__.py that was being generated. My contribution was figuring out os.walk() and then parameterizing the written string to handle the different directories.
Finally, this solution does require, as per HTF's suggestion, that I put an empty __init__.py file in each package.
With my solution in place, you can run build.py which then generates the quendor.py script. That script then executes correctly, in terms of recognizing the imports to various packages.
Playing around with just about every variation of import and file gathering that I can think of with your repo, there's a good news / bad news thing.
The bad news is that the answer is this: it isn't possible.
The good news is this: you do have a working implementation if you just keep all files in the quendor directory rather than having subdirectories.
The other good news is you stumbled on something, and posed a problem, that Python gurus aren't able to answer. And there's a certain pleasure to be found in that! I guarantee you will not get an answer to this that works (except for the "all files in one directory" solution).
A refinement to the answer is that if you're setting up the program to run as a module anyway, just use a pip configuration. That basically does the same thing that you want but without having to go through the contortions. (Unless there's a reason you were doing the build the way you were rather than using pip.)
I am new to ruby and chef. Please kindly help.
I have two scenarios here.
I have directories recursively in chef cookbook which are inside
/var/chef/cache/cookbook/book_name/files/
as, " files/appname/envname/instancename/ ".
each of these directories have some .yml files inside them with different variables and values in each of them.
I need to create directories first on target node/host in certain format.
after #1 is done, i need to create a file with certain name
inside that newly created directory/path "
After the file got created, I want to write some content into that file which will be based on the content in different yaml files located in {##/files/} of chef cookbook.
How can i achieve all the above in Chef using ruby or python? using Ruby is preferred, please.
Please provide some sample ruby code useful in Chef for the above. Please. Highly appreciated.
Sorry if I haven't provided enough info, this is my first time writing question on here. Apologies in advance.
How can i achieve all the above in Chef using ruby or python? using Ruby is preferred, please.
Please provide some sample ruby code useful in Chef for the above. Please. Highly appreciated.
Sorry if I haven't provided enough info, this is my first time writing question on here. Apologies in advance.
I will attach the actual question as a file since I'm having hard time figuring out how to not get errors while trying to post this question.
Adding extra info as my own comments since file attachment is not supported.
I am interested in gleaning information from an ESRI .shp file.
Specifically the .shp file of a polyline feature class.
When I open the .dbf of a feature class, I get what I would expect: a table that can open in excel and contains the information from the feature class' table.
However, when I try to open a .shp file in any program (excel, textpad, etc...) all I get is a bunch of gibberish and unusual ASCII characters.
I would like to use Python (2.x) to interpret this file and get information out of it (in this case the vertices of the polyline).
I do not want to use any modules or non built-in tools, as I am genuinely interested in how this process would work and I don't want any dependencies.
Thank you for any hints or points in the right direction you can give!
Your question, basically, is "I have a file full of data stored in an arbitrary binary format. How can I use python to read such a file?"
The answer is, this link contains a description of the format of the file. Write a dissector based on the technical specification.
If you don't want to go to all the trouble of writing a parser, you should take look at pyshp, a pure Python shapefile library. I've been using it for a couple of months now, and have found it quite easy to use.
There's also a python binding to shapelib, if you search the web. But I found the pure Python solution easier to hack around with.
might be a long shot, but you should check out ctypes, and maybe use the .dll file that came with a program (if it even exists lol) that can read that type of file. in my experience, things get weird when u start digging around .dlls
For starters I'm going to make a program which analyses my poker hand histories which are stored automatically as text files.
So which library do I need to snoop around in if I'm looking to analyse .txt files? I mean I can find some functions but I want to become more independent instead of googling a solution each time and actually learning things by myself...tell me if this is a stupid idea.
Thanks in advance.
open() if its very simple, csv if its a bit more complicated and pandas for everything else.