Python

I want to install the Schedule.
Installation reports errors
Some missing python packages
How to fix it?

install_piSchedule7 100%[=====================>] 3.68K --.-KB/s in 0s

2015-11-27 20:35:50 (11.4 MB/s) - ‘install_piSchedule7.sh’ saved [3764/3764]

*** Installation of piSchedule *** rev.15-08-05

INFO - Download piSchedule etc … to the directory

INFO - /home/pi/piSchedule7/ does NOT EXISTS!
INFO - /home/pi/piSchedule7/ will be created.
INFO - Make dir for piSchedule logging /home/pi/piSchedule7/logs
INFO - get piScheduler python supporting software
Reading package lists… Done
Building dependency tree
Reading state information… Done
Package python-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
python

E: Package ‘python-dev’ has no installation candidate
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package python-pip
… piScheduler – install python-dateutil
sudo: pip: command not found
… piScheduler – install APScheduler
sudo: pip: command not found
… piScheduler – install ephem
sudo: pip: command not found
… piScheduler – install bottle
sudo: pip: command not found
INFO - System Updating
INFO - get piSchedule7 code
Archive: piSchedule.zip
creating: static/
inflating: static/bootstrap-clockpicker.js
inflating: static/bootstrap-clockpicker.css
inflating: piSchedule.py
inflating: piPrefs.py
inflating: piSchedule.ini
inflating: wochenende.ini
inflating: piStrings.json
inflating: piMain.tpl
inflating: piGeoDetails.py
inflating: piEdit.tpl
inflating: update_piSchedule7.sh
inflating: install_piSchedule7.sh
inflating: piSchedule.tpl
inflating: piLogs.tpl
inflating: piStrings.py
inflating: piPrefsEdit.tpl
inflating: piSchedule.sh
inflating: piLog.py
inflating: newDaySchedule.ini
inflating: piDiscover.py
INFO - reset prefs file ‘piSchedule.prefs.json’

 *** piSchedule is ready to be used ***
 *** Test piSchedule.py in piSchedule7 with
       cd ~/piSchedule7
       ./piSchedule.py
 ... See the Bottle prompt for the server:port to be used with piSchedule
     like this
            Bottle v0.12.8 server starting up (using WSGIRefServer())...
            Listening on http://192.168.178.50:5005/
            Hit Ctrl-C to quit.
 ... Terminate with Cntrl C   .. may need typing twice
 *** Start 'piSchedule' using
        sudo service piSchedule start
     Check with
        sudo service piSchedule status
     Usage of 'service', see also ~/piSchedule7/piSchedule.sh
 *** Move over to your browser and start the piSchedule home page
     using the server:port as prompted with the piSchedule start.
 *** For more detailed information see also
     DE:   https://dl.dropboxusercontent.com/u/35444930/piSchedule7/DE/piScheduleOverview.html
     EN:   https://dl.dropboxusercontent.com/u/35444930/piSchedule7/EN/piScheduleOverview.html

How to update python ?