The method flip was introduced in numpy 1.12.0.
Pythonista ships with numpy 1.8.0, so this feature is not included. You have to wait for a new Pythonista version, which will most likely include a later version of numpy.

It would be nice if the Black formatter could be added natively to Pythonista.
For those who don't know about Black: this is a code formatter that makes your code PEP8 compatible and very consistent: highly recommended. See https://black.readthedocs.io/en/stable/ for details.

In the python-announce-list newsletter, I found the announcement of a new Python implementation on iOS. Interestingly, PyTo, runs Python 3.7 and has built in NumPy, matplotlib and Pandas!
I have just downloaded it and it looks pretty well organized and well thought of. I haven't done any thing serious testing yet, though.

Here is the announcement:

---------- Forwarded message ----------
From: Adrian Labbe Adri_Labbe@hotmail.com
To: "python-announce-list@python.org" python-announce-list@python.org
Cc:
Bcc:
Date: Sat, 23 Feb 2019 15:49:30 +0000
Subject: Pyto: Open Source iOS app to code Python with NumPy, Pandas & Matplotlib
Hello!

I wanted to announce here a "new" iOS app for coding Python: Pyto. It's available on the App Store and is open source.

Features

The app has a file browser with scripts, a code editor with syntax coloring and smart code completion and a console that supports input. It also has a REPL. Themes can be applied for the whole app.

Debugger

Scripts can be debugged with PDB and breakpoints can be set from the editor.

Apple APIs with Python

A module is pre-installed for accessing Objective-C class. An 'UIKit' module is written on top of it with all UIKit classes and an 'ui' module allows showing user interfaces created with Apple APIs.

C Extensions

iOS restrictions make impossible to load dynamic libraries outside the app bundle, so no module with C code can be installed, like NumPy, Pandas and Matplotlib. So, the main goal of this app is to provide latest versions of most popular libraries that have C code and cannot be installed by the user.

The app has NumPy 1.16.1, Pandas 0.24.1 and Matplotlib 0.24.1. Matplotlib supports displaying figures on the console.

Other pure Python modules

Other pure Python modules can be installed with a minimal version of pip.

Links

Source code: https://github.com/ColdGrub1384/Pyto
[https://avatars0.githubusercontent.com/u/19255527?s=400&v=4]https://github.com/ColdGrub1384/Pyto

ColdGrub1384/Pytohttps://github.com/ColdGrub1384/Pyto
Python IDE for iOS and macOS with, NumPy, Matplotlib, Pandas and UIKit support - ColdGrub1384/Pyto
github.com

App Store: https://itunes.apple.com/us/app/pyto-python-ide/id1436650069?ls=1&mt=8
Home page: https://develobile.com/pyto/
[https://is3-ssl.mzstatic.com/image/thumb/Purple124/v4/9b/e8/9d/9be89dd6-f54f-52c0-b0c7-0d6374696034/AppIcon-0-1x_U007emarketing-0-0-GLES2_U002c0-512MB-sRGB-0-0-0-85-220-0-0-0-7.png/1200x630wa.png]https://itunes.apple.com/us/app/pyto-python-ide/id1436650069?ls=1&mt=8

‎Pyto - Python IDE on the App Store - itunes.apple.comhttps://itunes.apple.com/us/app/pyto-python-ide/id1436650069?ls=1&mt=8
Pyto is a Python 3.7 IDE for iPhone an iPad. You can run code directly on your device and offline. Features: - Python 3.7 with all default libraries like "sys"
itunes.apple.com

Any plans to support Pandas?

I am about to buy the new iPad Pro 11. Does Pythonista run (properly) on this machine?

@mikael
Well, 4 spaces is the standard and seems perfect for me (on iPad Pro 10.5" and Windows).

@JonB
How do I manually install?

Is it possible to run the Python reformatter Black under Pythonista? If so, how?

Did you check all the versions of modules, as I described in an earlier message?

I am also willing to pay for continued support for this super application.