I would like to write some Python code in Windows using QtPy. But before I do that I'd like to know that I can use the code I wrote in Python. I understand that the complied program won't work due to different platforms but will there be any issues with regards to the *.py files I write in windows vs linux?
I've been trying to install QtPy on my Mint installation and I just don't know what the problem is. Which is why I wanna go this route.
I'd also like my code to work on the raspberry pi.
Could you guys advise me to this end?
Thanks!
Mostly, yes, as long as you keep to using the tools Python provides you and don't write code that is platform specific.
Use os.path.join() to build paths, for example. Open files in binary mode when you deal with binary data, text mode when it's text data. Etc.
Python code itself is platform agnostic; the interpreter on Linux can read python code written on Windows just fine and vice versa.
The general rule of thumb is to pay attention to the documentation of the modules you are using; any platform specific gotchas should be documented.
It depends on what your code does. Most packages work in both windows and linux however some such as signal only work in windows and are not portable. But in the python docs it will say what platforms a given package works in.
Related
I very recently wrote a program for a friend where it simplifies some important daily calculations for him/her. Now, the problem I am having is that I want to compile the code into an executable program so that he/she can comfortably run it on their machine, perhaps with a simple graphical interface or whatnot.
I have tried using cx_Freeze with Python 3.3.0 64 bit but to no avail (the program simply refuses to start on their machine; I even tried generating an executable via 32-bit Python, but also to no avail). What I then thought was that I could perhaps generate an executable program via PyGame? But the fact of the matter is that I have never used any Python-related program except the IDLE, so I am not sure what to do and look for.
Another option would perhaps be to convert the Python 3.3.0 code to Python 2.x, but the problem is that I am not familiar with Python 2.x and neither is there any automated converter available (as far as I know). I was wondering whether anyone of you could direct me to any good sources/links, since those I have been ferociously Googling are rather inconcrete.
You could just use py2exe. It is compatible with python 3. I have seen tutorials for it on youtube.
You could try embedding it in a C program, and compiling that for your executable. A decent tutorial is in the python docs at http://docs.python.org/2/extending/embedding.html
PyInstaller "is a program that converts (packages) Python programs into stand-alone executables, under Windows, Linux, Mac OS X, Solaris and AIX" and gives you one standalone executable file.
Even as a noob Python user I have succeeded to pack my app using PyInstaller (relatively) easily.
I have written a program. I don't know if it is important how it is written but you can find it here: http://pastebin.com/Z3ZvVPV8 Basically, it asks you to assign values to variables and will perform calculations depending on what variables you chose, and prints the answer.
I would like to know how I can make the program run in a window other than cmd (I am using Windows Vista 32bit). I don't need much at all in terms of GUI, just a window that is a bit more user friendly/easier to look at when they are using the program.
EDIT: To those suggesting using IDLE, while that would work for me, if others want to use the program they would have to download it, so I was hoping for a way for that not to happen.
Python comes with a sort of default GUI package TkInter you can use it.
Also there is a lot of other GUI packages available.
The Python standard library offers a lot of ways to implemt simple (but also rather complex) GUIs. I'd like to point you at the documentation of TK (tool kit for graphical interfaces) http://docs.python.org/library/tk.html where you will find also some useful example of use.
Py2Exe is a viable option if you really don't need a gui. This will make it run and look like a command prompt, but it will be an .exe file. Here is a quick quote from thier page: "py2exe is a Python Distutils extension which converts Python scripts into executable Windows programs, able to run without requiring a Python installation."
Another alternative is to get Portable Python. Here is a quote from thier webpage: "Portable Python is a Python® programming language preconfigured to run directly from any USB storage device, enabling you to have, at any time, a portable programming environment. Just download it, extract to your portable storage device or hard drive and in 10 minutes you are ready to create your next Python® application." After packaging the portable python and your .py or .pyc file then create a .bat file that runs the portable python "Python-Portable.exe" with the correct command line parameters for loading your script. Be sure to use relative paths in the batch file in case they are running it from a flash drive, or something other than the same location as you.
NOTE: This is really not a good way to do this as thier download page states: "Installed size: based on selected packages, between 49MB and 480MB". Also be sure to read the the current Python Software Foundation License, as that is what Portable Python is released under, and it may or may not be legal to package it in a closed source project. I haven't really looked at the license myself to be able to tell you. If you are releasing it as open source, then there would not be an issue though. As a quick side note, if you need that .bat file to be a .exe file then you can use a .bat to .exe converter battoexe.com is one. This is really going the long way about doing the whole thing, but it is an option.
Sources:
Working with Python on and off for 7 years now, a lot that using a portable version on a flash drive, and also dealing with Batch files much longer.
There is a related question. The answer there suggests using PyInstaller. I'm looking at PyInstaller documentation. In the meanwhile, if somebody could specify how this could be done using bbfreeze that would be great, since we already have a deployment system in place that uses bbfreeze.
It is not terribly likely. If I were you I would try to use the Windows PY2EXE inside WINE. If it works, you are golden, if not head to your local used laptops flea market and get an old Windows XP machine to do the job.
I have a wxPython application that is almost done & I would like to place it in my portfolio. I have to consider when someone attempts to run my app that they may not have Python, or wxPython, so if they just click the main script/python file its not going to run, right?
How should I distribute my app (how do you distribute ur apps) so that it can be run & also so that it could be run on the 3 major OS's (Unix, Windows, MacOSX)?
I know of py2exe for releasing under windows, but what can I use for Unix & MacOSX to compile the program? Whats the easiest way?
Use Gui2exe and compress with UPX to get unpacked size down.
For a setup file(exe) with uinstall info Inno-Setup is good.
I have use this with wxpython several times and got it to work on all windows versions.
For Gui2exe use optimize(2) - compressed(2) - Bundle files(3)
Bundle files(3) is the most stable,
Bundle files(1) make one big exe-file.
For one exe-file is better as last step to use Inno-Setup
You can use py2exe for Windows and py2app for Mac. PyInstaller works for Windows and Linux. Personally, I use GUI2Exe, which wraps all three and makes them a little easier to use. Note: I don't have a Mac, so I haven't tried it with that. You can check out my series on freezing Python here:
http://www.blog.pythonlibrary.org/2010/08/10/a-pyinstaller-tutorial-build-a-binary-series/
http://www.blog.pythonlibrary.org/2010/07/31/a-py2exe-tutorial-build-a-binary-series/
http://www.blog.pythonlibrary.org/2010/08/31/another-gui2exe-tutorial-build-a-binary-series/
There are a couple others on the blog too.
I suggest both, script for all platforms and frozen binary for lazy windows users.
To answer your latest question, you don't compile python. Python is an interpreted language, it gets compiled on the fly when run. A python frozen binary is actually the python interpreter with your script hardcoded in it. And frozen binaries are windows-only, AFAIK. Besides, Unix and MacOS (usually) come with python pre-installed.
I once read about minimal python installation without a lot of the libraries that come with the python default installation but could not find it on the web...
What I want to do is to just pack a script with the python stuff required to execute it and make portable.
Does any one know about something like that?
Thanks
Micro Python is actively maintained and has been ported to a bunch of microcontrollers.
For other small implementations, you might also want to check out tinypy or PyMite.
If you don't care about size, but really just want an easy way to distribute a python program, consider PyInstaller or one of the others on this list.
Portable python might do what you want. It's a python installation for USB thumb drives.
There's now finally Micro Python, claiming to be full reimplementation of Python 3 core, fitting even into medium-size 32bit microcontrollers. API will be different of course, so C modules will require porting. Project is funded via KickStarter, source code will be released some time after the campaign (request for consideration was made to author to not delay release of the source, to help bootstrap Micro Python community sooner).
http://micropython.org/
You can also look for already installed instances.
OpenOffice / LibreOffice
Look at the environment variable UNO_PATH or into the default install directories, for example for Windows and LO5
%ProgramFiles(x86)%\LibreOffice 5\program\python.exe
Gimp
look into the default install directories, for example for Windows
C:\Program Files\GIMP 2\Python
and so on...