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I need a python library that could read and write Excel files with all formats (i.e xls and xlsx).
I'm new to python and I was using Java before. In Java I was using POI library and it was perfect. I need a python library with the same functionality if possible.
I know this thread hasn't been active in a while, but I thought it would be nice to add an answer here since I made a new solution to this problem.
I had this same issue so I went ahead and created a small library that includes python-excel (xlrd, xlwt) and openpyxl within it. You can find it here: https://github.com/camyoung1234/spreadsheet
Then to use it you type the exact same code as openpyxl, except you replace openpyxl with spreadsheet. When you load and save files it looks at the extension and determines which library to use for handling it.
To install it just download it, extract it, rename the folder spreadsheet-master to spreadsheet and place it in PythonXX/Lib/site-packages/ (I've only tested with Python 2.7 but it should work with others)
The README has a few examples to help you get started.
Python excel looks like a go: http://www.python-excel.org/
Also OpenPyXl may have the features you need: http://packages.python.org/openpyxl/
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If I were to write a macro in python for libreoffice calc and save the file as an xlsx file will the macro work in ms excel on a windows pc?
I am thinking of learning python so I can write macros for ms excel in python on libreoffice.
No, Excel only natively supports macros written in VBA.[1]
Sort of.
You won't be able to directly use python macros from libreoffice, but you can use python to automate MS office
See here: Using Python to program MS Office macros?
I've used the win32Com method, and it did everything i needed. I don't think there's much benefit of doing things this way unless you're using some of the power of python for other interactions.
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I do scientific computing and am currently using MATLAB. I have however recently started learning Python. I find the MATLAB Central file exchange very helpful and people share a lot of their programs there.
Are there equivalent code repositories and places where people share the programs they have written for the Python community? Especially for engineering and scientific computing.
Since programming in Python revolves around using modules and packages, you might find Python's package index PyPI very useful. It allows you to easily integrate other people's code into your programs.
If you're more interested in finding out how some thing were implemented, then you might want to explore code on github. There is a ton of code out there, so you should be able to profit from it.
In case you're interested in figuring out how to use some library for scientific computing, you can find detailed examples for numpy, scipy, matplotlib and so on.
This might serve you as a good starting point for exploring Python code and examples.
The scipy Cookbook has small pieces of code, but they should only receive general-purpose and good-quality code:
http://wiki.scipy.org/Cookbook
Or the python package index:
https://pypi.python.org/pypi
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I want to pack pure python library into one source python script. (not exe, app, etc. I need exactly lib.py file) Is it possible? Which tools are exist for this?
Best is to pack all your python files into a zip: https://blogs.gnome.org/jamesh/2012/05/21/python-zip-files/
If you really want to, sure, it is possible to pack everything (including a zip I think) to a .py file, just write your custom importhook, store base64-encoded zip archive as a string in your since python source, a bit of hardcore magic here and there and voila, single python program,
Alternatively you could refactor all your dependencies and include these as classes for example in your source, but why bother?
Finally, there's no simple way to include compiled dependencies, i.e. those .so / .dylib / .dll files.
I don't think there is a tool out there that does exactly what you want, but I reckon pyinstaller/py2exe can be used to get pretty close, for example http://www.py2exe.org/old/ look for library.zip.
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I know that PDF files can be viewed using Poppler and various combinations of software and programming languages, such as using Qt 4 or 5 and C or C++.
I've also seen ways to display PDFs from Python using GTK or other libraries that need to be installed on a system. I know to do any direct display, I'll have to use that.
I do not want to create PDF files. I want to be able to take a PDF file and render it, one page at a time, into a graphical format and then display the result of that page.
Is there any way to be able to render a PDF to a graphical format, like JPG, PNG, or BMP without requiring libraries that are likely in native code on whatever system is being used? For instance Poppler is in either C or C++ (I keep forgetting which) and is compiled and installed as binary libraries.
Some background that may help is that I saw a link to Kivy, which would be an easy to use cross-platform GUI toolkit for Python, but I'd need to display PDFs for some projects. I don't mind doing the extra step of having to render it, then displaying the output if it gives me more independence from needing other libraries.
Sorry, but the answer is simply going to be no. PDF rendering is difficult, and not that many libraries do it well enough to be usable.
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Do you know of any tool that could assist me in obfuscating python code?
Your problem space is underspecified. Is this for a command-line app? Is this code supposed to be used as a library?
In addition to the two other answers, you could embed the code into a binary. When it starts, decode the code and eval the string. This works for a shared library extension as well. You could also do that with byte code, I think, but it wouldn't be as simple as calling Py_EvalCode.
py2exe or freeze are other solution, which convert the code into an executable. It just includes the code in the binary, and doesn't do any sort of serious obsfucation, but it's still harder than opening a .py file.
You could write the code in Cython, which is similar to Python and writes Python extension files in C, for use as a .so. That's perhaps the hardest of these to reverse engineer and still give you a high-level language for develoment.
They are all hackable, as are all solutions. How hard to you want it to be?
http://www.lysator.liu.se/~astrand/projects/pyobfuscate/
Or at http://freshmeat.net/projects/pyobfuscate/
I actually found a very nice project which basically converts a Python to C++ and create a binary, statically linked file.
Check this out: http://www.nuitka.net/
In many situations you can ship byte-compiled .pyc files instead of the .py source files. This gives you some level of obfuscation. As the pyobfuscate README suggests, this has limitations. But you may be able to combine the two approaches.
Python's standard library includes compileall.py. You can run this on a directory and it will generate .pyc files for all your source files. The .pyc files will only include bytecode and docstrings, and will strip out all comments. You could then copy this directory, and then run something like rm -rf $(find . -name .py) to remove the original source files.
Your best bet is to compile it using Shed Skin, an experimental Python-to-C++ compiler.
Although it doesn't do obfuscation, this Python recipe works very well for minimizing the size of Python code, including stripping out comments.