Install Python

This week we will be:

• Installing python, music21, and possibly other things on our computer.
• Talking about how to run things on your desktop.
• Look at metadata.
• Look at searching for things.
• Presenting your work (on Wednesday).

Does your computer have python already?

On a mac:

Go into your terminal application and type:

which python

We've been using Python 3 this semester (and you should probably avoid Python 2 at this point, unless absolutely necessary).

To see which version you're computer is currently using, type in:

python --version

Switching your python version can be a bit difficult.

Because of all of these version issues, I like to use pyenv.

This process is fairly painless.

Installing with homewbrew:

One way to update is with homebrew:

brew install python

Then find out where it's installed:

ls -l /usr/local/bin/python*

Then change the link like this:

ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python

and then see if it's changed your version:

python --version

I think this is how it's done in Windows:

https://docs.python.org/3/using/windows.html

Installing music21 on a Mac:

##installing music21
sudo pip3 install music21

Configuring music21 from python:

import music21
music21.configure.run()

Configuring from the command line:

python3 -m music21.configure

On Windows, it's discussed a bit here: https://web.mit.edu/music21/doc/installing/installWindows.html

#@title Setting up music21 in the background. { form-width: "30%" }
# !pip install --upgrade music21
!add-apt-repository ppa:mscore-ubuntu/mscore-stable -y
!apt-get update
!apt-get install musescore
!apt-get install xvfb
import os
os.putenv('DISPALY', ':99.0')
!start-stop-daemon --start --pidfile /var/run/xvfb.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1024x768x24 -ac +extension GLX +render -noreset
from music21 import *
us = environment.UserSettings()
us['musescoreDirectPNGPath'] = '/usr/bin/mscore'
us['directoryScratch'] = '/tmp'
!sh -e /etc/init.d/x11-common start

lamb1 = corpus.parse('palestrina/agnus_I_01', forceSource=True)

justTheNotes = lamb1.recurse().notes
searchList = [note.Note(type='whole'), note.Note(type='whole'), note.Note(type='whole')]

search.rhythmicSearch(justTheNotes,
                      searchList)

secondEntry = justTheNotes[107]
secondEntry

secondEntry.getContextByClass('Part')
secondEntry.beat

lamb2 = lamb1.stripTies(retainContainers=True)

justTheNotes = lamb2.recurse().notes
search.rhythmicSearch(justTheNotes,
                      searchList)