Month: November 2017

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Install py-tree on Pythonista3

How to install py-tree on Pythonista3 and use it easily.

With py-tree command, you can list files and directories in a tree view

[mysite]$ tree
.
|-- db.sqlite3
|-- manage.py
|-- mysite
|   |-- __init__.py
|   |-- settings.py
|   |-- urls.py
|   `-- wsgi.py
`-- polls
    |-- __init__.py
    |-- admin.py
    |-- apps.py
    |-- models.py
    |-- tests.py
    |-- urls.py
    |-- views.py
    `-- migrations
        |-- 0001_initial.py
        `-- __init__.py

Not only in Pythonista3 but also in many cases, you want to see all directories and files of your project in a better format in CLI, StaSh in Pythonista3’s case. The py-tree command is the solution.

Installation

You can easily install by running the following command in StaSh (type strings after the command prompt [stash]$ and hit [enter]).

[stash]$ pip install py-tree

Run the command by entering only “tree”.

Entering a dash “-” character in iPhone is a bit annoying so let’s create an alias tree.
In StaSh, you can create .stashrc file which works like .bashrc file for Linux’s  bash shell. Follow the example below to create an alias.

[stash]$ cd site-packages/stash/
[stash]$ la
.gitignore .stash_history .stash_tips .travis.yml CHANGES.md LICENSE README.md __init__.py bin docs getstash.py lib man stash.py system
[stash]$ touch .stashrc
[stash]$ echo "alias tree='py-tree'" >> .stashrc
[stash]$ cat .stashrc
alias tree='py-tree'
[stash]$ la
.gitignore .stash_history .stash_tips .stashrc .travis.yml CHANGES.md LICENSE README.md __init__.py bin docs getstash.py lib man stash.py system

Quit and relaunch Pythonista3 to let StaSh load the .stashrc file. Now you can use the tree command. Woo-hoo!

Create and edit files with different file extension than “xxx.py”.

You cannot create a file like “.stashrc” in Pythonista3 as it adds surfix “.py”. Also, once a file is created, it won’t appear in the file list to edit. So, when you need to create such a file, use touch command then use edit command to edit it in Pythonista’s Edit screen. ls -a or its alias la is the command to show invisible files in StaSh.

Summary

PurposeStaSh CommandExample
Create invisible file.touchtouch .invisible
Edit file in Pythonista3.editedit .invisible
List files including invisible files.ls -a
or simply
la		la
(la .*
lists only invisible files.)
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Install and Setup Django in Pythonista3 (iOS app)

How to Set up Django in Pythonista3, iOS app for iPhone and iPad:

First, make sure you have StaSH installed in your Pythonista3 app.

In StaSH execute following command:

pip install Django==1.11.6

Select version “1.11.6” or Long Term Support version available. See Djangoproject.com website for the latest LTS version available. (Comment added on Jun 12, 2021) you may be able to execute “pip install django” and the version 3.2.4 will be installed. Specifya version only when necessary.

Quit and launch Pythonista <– This is one of most important steps when you make changes to Pythonista3!

Create an application (in stash)

django-admin.py startproject mysite

Quit and launch Pythonista

Open /mysite/manage.py
Go to console and run:

import sys
sys.path

Locate and copy a line like below where “…” is device specific.

/private/var/mobile/.../Documents/mysite

Go back to the edit page (manage.py).
Add a line like below under “import sys” — replace “PASTE HERE” with the line copied in the prev step. (Comment added on Jun 12, 2021) Removed unnecessary “=” after “append”.

sys.path.append(“PASTE HERE”)

So, it will look something like below:

sys.path.append("/private/var/mobile/Containers/Shared/AppGroup/C1F57ABC-DDDD-EEEE-FFFF-B0B0E0B0B0E7/Pythonista3/Documents/mysite/")

Quit and launch Pythonista

Open /mysite/manage.py, tap and hold the play (run) button and enter “runserver --noreload” as an argument. You may need to copy and paste “--noreload” without double-quotes.


If you see unforseen errors, quit Pythonista and relaunch then follow the steps again.
If successful, you see something like below in the Console:

Performing system checks...

System check identified no issues (0 silenced).

You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
November 03, 2017 - 20:46:35
Django version 1.11.6, using settings 'mysite.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

Now, open http://127.0.0.1:8000/ in Safari or any other web browser.

Version 3.2.4

If you see the “Congratulations!” page, your setup is complete, and it’s time to move forward to programing your own site/app.
Make sure you quit and relaunch Pythonista to properly apply your changes to your Django sites/apps.

StaSH log (installation of Django 1.11.6):

[~/Documents]$ pip list
[~/Documents]$ 
[~/Documents]$ 
[~/Documents]$ pip install django
Querying PyPI ... 
Error: Source distribution not available for Django: 2.0b1
[~/Documents]$ pip install Django==1.11.6
Querying PyPI ... 
Downloading package ...
Opening: https://pypi.python.org/packages/13/26/f3841e00663027ba7cf7ce7ba2cabb682a83cf0629bef013d70bebefa69d/Django-1.11.6.tar.gz
Save as: /private/var/mobile/Containers/Data/Application/20C8FA54-EEEE-FFFF-8888-3BACC5555555/tmp//Django-1.11.6.tar.gz (7874450 bytes)
   7874450  [100.00%]
Extracting archive file ...
Archive extracted.
Running setup file ...
Handling commandline script: django/bin/django-admin.py
Package installed: Django
Dependency available in Pythonista bundle : pytz
[~/Documents]$ 
[~/Documents]$ 
[~/Documents]$ which django
[~/Documents]$ pip list
Django (2.0b1) - A high-level Python Web framework that encourages rapid development and clean, pragmatic design.
[~/Documents]$
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