B4A Library NinjaPython - Use Python Scripts in B4A

wonder · Oct 19, 2017

Work in progress - Work in progress - Work in progress - Work in progress - Work in progress

Work in progress - Work in progress - Work in progress - Work in progress - Work in progress

The NinjaPython B4A library brings you the ability of utilizing the Python language inside your B4A games and apps.
This can range from a few lines of code to entire scripts or object oriented modules, the choice is yours.

Quickstart:

- Switch 'Compilation Mode' to Release
- Download the library files and place them in your B4A external libraries folder.
- Option A: Download the resource files and place them in your project's Files folder.
- Option B: Download the test project below.
- See the 'usage' example below.

Practice:

https://www.pythonanywhere.com/try-ipython/

Features:

- CPython Interpreter 2.7.9
- Python Standard Library
- x86 and ARM compatible
- Ongoing development

Wishlist:

- Dedicated function calls
- Passing and returning B4A objects such as lists and maps
- Support for 3rd party libraries

Price (pay what you want):

- Free
- 2 beers
- 1 pizza
- 1 EVGA GeForce GTX 1080 Ti FTW3 GAMING

Test project:

- https://drive.google.com/open?id=0B3qpjqbKLKPRM2t0dHFYMEl4VmM

KanBan board:

- https://trello.com/b/0Taq3CG8/ninjapython

Library files (1.03):

- https://drive.google.com/open?id=0B3qpjqbKLKPRMXZ0bHREYnVJRnc

Resource files:

- https://drive.google.com/open?id=0B3qpjqbKLKPRNnpPVDJ3T3U3NnM

Usage:

B4X:

Dim Py As NinjaPython
Py.Initialize
Py.Exec($"
def SayHello(subject):
    print 'Hello, ' + subject + '!'
"$)

...
...
...
...

Py.Exec("SayHello('world')") 'Outputs and returns 'Hello, world!'
Py.Finalize

Learn:

/SPOILER]

Enjoy!

Husam · Oct 31, 2017

wonder said:
Can you send me your B4A project?

https://drive.google.com/file/d/0B6vTmAv8ThXxc05ZWTBQRjZoYkU/view?usp=sharing

wonder · Oct 31, 2017

No issues here, I successfully imported the Regex module and displayed its contents.
Tested on two different devices (PC and Tablet).

Memu PC Emulator (x86):

NVIDIA Shield Tablet K1 (ARM):

Do you have the same issue with the Demo project?

Husam · Oct 31, 2017

wonder said:
No issues here, I successfully imported the Regex module and displayed its contents.
Tested on two different devices (PC and Tablet).

now its work, i just changed the compilation mode from debug to release

B4X:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
[NinjaPython] ARM CPU detected
[NinjaPython] Python 2.7.9 was successfuly installed in: /data/user/0/b4a.example/files
[NinjaPython] Initialized
[NinjaPython] In [1]:
SayHello('world')
[NinjaPython] Out[1]:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'SayHello' is not defined
[NinjaPython] Terminated
** Activity (main) Resume **

wonder · Oct 31, 2017

Glad to hear that!

Regarding your Python code, note that you are calling a function that was not previously declared. You need to define SayHello().

B4X:

def SayHello(name):
    print "Hello, " + name + "!"

SayHello("world")

wonder · Oct 31, 2017

Here's an idea:

B4X:

'You can keep your functions on a separate file, without executable code
Dim myPythonFunctions = File.ReadString(File.DirAssets, "myFunctions.py") As String

'Start the interpreter
Py.Initialize

'Load your functions into memory
Py.Exec(myPythonFunctions)
...
...
'Call a specific function whenever you want
Py.Exec("SayHello('World')")
Py.Exec("SayHello('Moon')")
Py.Exec("SayHello('Mars')")

'Finalize destroys the interpreter object, meaning
'your functions are no longer in memory
Py.Finalize

Husam · Oct 31, 2017

its time to learn python

wonder · Oct 31, 2017

Check the video posted at the end of the first post.
If you need any help, just ask!

Meigionel TS · Mar 21, 2018

Is it possible to import popular libraries like scikit (including numpy) and pyaudio yet?

wonder · Mar 21, 2018

In the version currently being developed, it is possible to import some libraries in zip format, but something like "pip install" doesn't work.

Q Candiani · Jun 7, 2018

Great work! I interest to use de psycopg2 library to connect to a postgresql database from my app. Is there any way to use it? I think it would be very powerful tool. Thank you very much

walterf25 · Jun 9, 2018

Is this library only for B4A, or will it work in B4J?

Walter

wonder · Jun 13, 2018

Hi!! I'm back from the dead!

walterf25 said:
Is this library only for B4A, or will it work in B4J?

Nope, it's B4A only. On the PC you could just use regular Python, right?

Cableguy · Jun 13, 2018

wonder said:
Hi!! I'm back from the dead!

You never die while someone still remembers you!

Nope, it's B4A only. On the PC you could just use regular Python, right?

Just out of curiosity, how could python be integrated in a b4j project?

DonManfred · Jun 13, 2018

Cableguy said:
Just out of curiosity, how could python be integrated in a b4j project?

B4X:

Sub StartTest
    Dim shl As Shell
    shl.Initialize("shl","python",Array("/.../.../test.py"))
    shl.RunWithOutputEvents(-1)
End Sub

Sub shl_StdOut (Buffer() As Byte, Length As Int)
    Dim Output As String = BytesToString(Buffer,0,Length,"UTF-8")
    Log(Output)
End Sub

Sub shl_StdErr (Buffer() As Byte, Length As Int)
    Dim Output As String = BytesToString(Buffer,0,Length,"UTF-8")
    Log(Output)
End Sub

ilan · Jun 13, 2018

wonder said:
Hi!! I'm back from the dead!

nice to see you again wonder. where have you been? undercover?

wonder · Jun 18, 2018

Hey Ilan! I'm doing alright, thanks!! How about you?
Well, I barely have time to dedicate myself to B4X nowadays, due to my current schedule.

I'm still working on some of my stuff, here and there.

ilan · Jun 18, 2018

wonder said:
I'm still working on some of my stuff, here and there.

Please dont abandon your 2d knight game. You must finish it. It is a master piece.

wonder said:
How about you

I am fine thanx. I also have very little time for coding. I switch job 1 month ago and i have lot of work in my new job so less time for my b4x projects but right now i am working on a b4a app that will make me rich.

(If i would get 1$ for everytime i thought this will be the one i really would be already rich)

sorex · Jun 18, 2018

are you still into CNC? or did you enter the world of IT as profession?

ilan · Jun 18, 2018

sorex said:
are you still into CNC? or did you enter the world of IT as profession?

CNC, but i am a cnc programmer so i do work with softwares.

wonder · Jun 19, 2018

ilan said:
Please dont abandon your 2d knight game. You must finish it. It is a master piece.

I won't! I've been learning GLSL and experimenting with shaders!

ilan said:
i am working on a b4a app that will make me rich

Ahahah!!! I really hope that day will come!!!

On a side note, this thread is about NinjaPython, so better if we can get back on topic before Erel gets mad.

B4A Library NinjaPython - Use Python Scripts in B4A

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