Generally, pure python modules can be installed using pip in stash

However, despite numpy and matplotlib coming with pythonista, you cannot install other c/fortran packages like scipy, pandas, etc.

Numdifftools appears to require scipy, which means it probably won't work.

As others have stated, the app pyto is open source and does support scipy, however it's user interface apparently leaves a lot to be desired.

The error message seems pretty clear:

But when using "pip install scipy"
Package scipy is blocklisted and marked fatal. Failing install.
Reason: This package uses C-Code, which can not be compiled by StaSh.

C code cannot be compiled or installed on iOS. This is not a pythonista thing, it is not possible to run unsigned executables on iOS.

Numpy comes preinstalled (an old but functional version), so does pillow. Scipy cannot be installed. Pandas cannot be installed. Only pure python modules may be installed.

For my project, I need to use scipy, imreg_dft, imageio, numpy, etc.
But when using "pip install scipy"
Package scipy is blocklisted and marked fatal. Failing install.
Reason: This package uses C-Code, which can not be compiled by StaSh.
Error: Package 'scipy' blocklisted. Reason: This package uses C-Code, which can not be compiled by StaSh.

But when using "pip install pillow"
Extracting archive file ...
Archive extracted.
Running setup file ...
TypeError("unsupported operand type(s) for +: 'OmniClass' and 'list'",)
Failed to run setup.py
Fall back to directory guessing ...
Error: Cannot locate packages. Manual installation

What am I going to do with this?

Pythonista does not support scipy. It does have numpy, which has fft -- you might look up algorithms for the cwt that are based on fft, and roll your own.

Alternatively, sagemath does support scipy. Mateo has a wrench script that takes some code, and runs it on sagecell (cloud sage server). See
https://forum.omz-software.com/topic/4200/data-analysis-workflow/23?page=2

Hi, I am looking for CWT lib. ( Continuous Wavelet Transform). When we use normal Python, we can use Scipy lib. In those, there is a CWT function.But, if we use Pythonista, the Scipy cannot be installed. I would like to know, if have we other idea?

Looking at setup.py:

install_requires =
    requests[security]
    numpy
    scipy
    matplotlib
    pandas
    pillow
    pyglet
    pyopengl
    soundfile
    sounddevice
    python-bidi
    arabic_reshaper
    cffi
    future
    json_tricks
    pyosf
    xlrd
    openpyxl
    pyserial
    pyyaml
    gevent
    msgpack-numpy
    msgpack-python
    psutil
    tables
    pyzmq
    moviepy
    opencv-python
    python-gitlab
    gitpython
    astunparse
    esprima
    freetype-py
    # Platform-specific dependencies.
    imageio < 2.5; python_version < "3"
    imageio >= 2.5; python_version >= "3"
    imageio-ffmpeg; python_version >= "3"
    pyparallel; platform_system == "Linux"
    pyWinhook; platform_system == "Windows"
    pyqmix >= 2018.12.13; platform_system == "Windows"
    pyqt5; python_version >= "3"
    wxPython != 4.0.2, != 4.0.3; platform_system != "Linux"
    pypiwin32; platform_system == "Windows"
    pyobjc-core; platform_system == "Darwin"
    pyobjc-framework-Quartz; 

A good fraction of these are incompatible with pythonista. For instance scipy.

@JonB and @dgelessus, thank you for reply, yes my ultimate target is to write something (I don't know if I will have something working) for the Pythonista console able to send strings to sagemathcell server instead of execute them with internal python interpreter and to post-process the output in order to print the output from sage as string in the console (as described in my first example above).

Example of possible usage:

1. user enables the by-pass of internal interpreter with the execution of a specific script A as a wrench script
2. in this way the return key, when touched on the keyboard, doesn't call the internal python interpreter but reads the full string (the command written by user) and sends it to sage with all required arguments, waits for output and prints any output (output, warnings, errors, etc...) as string with images if existing.
3. user can decide if evaluate the output in order to convert it as a number, array, etc...
4. when user wants to return to use internal interpreter, a second script B should be executed always through the wrench menu (or the @JonB's StatusBarOverlay.py).

Like the following command in Pythonista console (as example):

>>> minimize(fun,x0,...)  ## from scipy.optimize

and the touch of the return key should send the string "minimize(fun,x0,...)" to server with all explicit arguments (fun, X0, args, method, etc...) after entering in the cell string the string "from scipy.optimize import minimize" for proper importing of the required module.

I asked about the existence of some objc commands to by-pass internal interpreter when user touches the return key after inserting the command in the console. Other option is to be able to install in Pythonista some specific library like fire, for example (but it seems to me not pure python, even if GitHub says it is 100% python: I tried to install it in Pythonista but it doesn't work).

Other option is to program a user key with @JonB StatusBarOverlay.py, it is what I will do. So (I hope) I will have a user defined key in upper status bar that simulates the return key of the built-in keyboard but with a specific pre-processing and post-processing action.

But I still have the curiosity to know if with Pythonista (and its several surprises) user can customize the effect of the return key touching in console environment.

Thank you for numerous tips and explanations.
Regards

It had been answered many times -- @omz has said he had no plans to implement scipy or pandas in the near future:

https://forum.omz-software.com/topic/1488/pandas-on-pythonista/22?page=2

https://forum.omz-software.com/topic/2544/wish-list-for-next-release/95#

There are more that I remember. The basic gist is that he has never said it will absolutely never happen, but also said he is not planning it in the near term, or commit to a date because it may or may not work out.

If I needed to use scipy/pandas on my iPad today, I would be using sagecell to run my work in the cloud. Not quite as convienent, but the wrench script works and makes it somewhat transparent. Any other promises or intentions are not going to help you today, and whining about it won't get it implemented sooner.

Hi guys.

Can I load mat file(matlab matrix file extension)?

Usually people use scipy module, but scipy cannot use Pythonista 3, right?

so, I just wonder there is any other option for loading mat file.

Hi @reticulated, I'm quite sure omz is still working on Pythonista because I think it's tremendous (and not very smart) that such an application is abandoned. We should know that he knows this fact (I know he knows this fact).

I'm happy when people help people with ideas, codes, examples, informations.
You are talking about things too advanced for me, but I'm sure you are talking in order to give Pythonista more power.

The nice and curious thing is to understand how to give more power to Pythonista without pretending that is omz to give it (that is without need to compile entire Pythonista for new releases).

The best thing in my opinion is to give omz maximum freedom to decide when to give us new releases of his great app, and in the meantime people could continue to give more power to Pythonista, maybe with plug-ins development.

Some ideas:

• to extend functions of code editor with find/replace, reformat, code folding... with one click
• to extend functions of file browser with find/replace for files and folders and content (with regex), zip compression, full properties on files and folders (size, last edited data, if file is editable or not, so I'd like to block some files or folder by editing them, ... )
• to extend functions to link Pythonista to any computer for comfortable development of Pythonista/Python scripts using big pc keyboard (my iphone is little and to use WebIDE) we need a wifi shared, not always available, but maybe with bluetooth could be possible using only pure python libraries or scripts,
• to extend a possible free remote connection service/interface if you want to make calculations that require not-pure python libraries not present in Pythonista (scipy, pandas, etc..) and with a full and complete integration with the app environment (example: my script, to run, needs some scipy functions, ok, I write it in Pythonista and I execute the entire script with Pythonista interpreter, and only the code that requires scipy is executed by the server with full working input-output capabilities),
• to extend internal site-packages folder in order to be able to delete not used pure-python libraries, since we can reinstall them with pip (using StaSH for example).

Thank you
Regards