Transcript Python_final

Python for S60
Daniel Rocha
Forum Nokia
Agenda
• Introduction to Python for S60 (PyS60)
• Getting started with PyS60
• Packages
• Installation on a device
• Running sample apps
• Application development basics
• Tools, Emulators, Utilities packages
• Creating a stand-alone Python app
• PyS60 API Tour and Example apps
• Conclusion
© 2007 Nokia
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Introduction
About Python, the language...
• Open Source development since 1990, led by Guido
van Rossum
• Design goals: maximizing programmer
productivity and extensibility
• Special emphasis on code readability
• “small language, large library”
• Easily extensible with native code
• Modern, full featured: classes, inheritance, function
objects, exceptions, automatic memory
management, threads
© 2007 Nokia
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Quick code example
## first python script - this is a comment ##
>>>
Numbers are 10, 30, 40
x = y = z = 0 ## multiple assignment
List
3, 5, 7, 10],
List[0] is 1, List[0:2] is [1, 3] Is 9 in list? False
x = is
10 [1,
##variable
attribution
Looping:
1 3 5 7 10
y = x + 20
z = y is
+ x
Tuple
(10, 20, 30), Typle[0] is 10
Unpacking tuple (10, 20, 30) into: a=10, b=20, c=30
print "Numbers are %s, %s, %s" % (x,y,z)
Assoc is {'daniel': 29, 'jack': '80', 'susan': 28}, Assoc['daniel'] is 29,
Is
assoc?and
True
## susan
lists,intuples
associative arrays
>>>
list = [1,3,5,7,10]
tuple = (10,20,30)
assoc = {'daniel': 29, 'susan': 28, 'jack':'80'}
print "List is %s, List[0] is %s, List[0:2] is %s" % (list, list[0], list[:2])
print "Is 9 in list?", 9 in list
print "Looping:",
for x in list:
print x,
print "Tuple is %s, Typle[0] is %s" % (tuple, tuple[0])
a, b, c = tuple
print "Unpacking tuple %s into: a=%s, b=%s, c=%s" % (tuple, a, b, c)
print "Assoc is %s, Assoc['daniel'] is %s, Is susan in assoc? %s" %
(assoc,assoc['daniel'],'susan' in assoc)
© 2007 Nokia
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Python for S60 (PyS60)
• Simplifies application
development and provides a
scripting solution for
Symbian C++ APIs
• Usable in different ways:
• GUI application
• background (“daemon”) process
• embeddable in your C++ app
• Easier way of writing native
applications
• Open source
implementation, easy to
extend using Python/C API
© 2007 Nokia
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Python for S60 (PyS60) – contd.
• Based on Python 2.2.2
• Consists of:
• Python runtime:
• Python interpreter DLL
• Standard and proprietary Python
library modules
• Python Script Shell:
• Execution environment for
Python scripts
• For S60 prior to 3rd. Edition:
• Recognizer plug-in
• Automatic Installer
• SDK Plug-in for writing
extensions and testing
scripts on a PC (Windowsonly)
© 2007 Nokia
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Python for S60 (PyS60) – Libraries
• Support for Python Standard Libraries – not all
standard and optional modules but most can be added
without modifications to PyS60
• Support of many custom S60 libraries
• e32
• contacts
• sysinfo
• calendar
• appuifw
• e32db
• graphics
• E32dbm
• camera
• keycapture
• audio
• telephone
• inbox
• positioning
• sensor
• messaging
© 2007 Nokia
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Getting started with PyS60
Python on S60 Mobile Phones
• SourceForge project site:
http://sourceforge.net/projects/pys60
• Source code
• Docs
• Distributed by flavor of S60
• Interpreter
• SDK
• Script Shell
© 2007 Nokia
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What’s available at SourceForge
• pyS60 full C++ source code
• pyS60 Runtime, distributed by flavor of S60:
• PythonForS60_1_4_4_<yourS60version>.SIS for devices
• PythonForS60_1_4_4_SDK_<yourS60SDK>.zip for running Python
scripts on S60 emulator and compiling your own extensions
(Windows-only)
• pyS60 Script Shell, distributed by flavor of S60:
• Ideal for testing and developing scripts
• PythonScriptShell_1_4_4_<yourS60version>.SIS
• Also unsigned version, if more capabilities are needed.
• Complete API reference guide
• Release notes
© 2007 Nokia
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Getting started – PyS60 on a mobile device
• Install PyS60 Runtime
interpreter package. In our
example, Nokia E61i is a
3rd. Edition device so we
install
PythonForS60_1_4_4_3rd
.SIS
• You can perform
installation either via PC
Suite (Windows) or by
sending the .SIS file via
Bluetooth (Mac and Linux)
• This is the runtime
package, script shell will
be installed next
© 2007 Nokia
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Getting started – PyS60 on a mobile device
• Install PyS60 Script Shell.
In our example, Nokia
E61i is a 3rd. Edition
device so we install
PythonScriptShell_1_4_4_
3rd.SIS
• Script shell is useful for
quickly running and testing
scripts, run interactive
consoles
• Python app visible in the
main application menu
© 2007 Nokia
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Getting started – PyS60 on a mobile device
• Run script -> Reads from
E:\Python and C:\Python
• There is an interactive
console for on-device
editing
• Bluetooth console for
remote editing of Python
scripts
• Not required for running
Python stand-alone apps!
Interpreter and Script shell
are not dependent on each
other
© 2007 Nokia
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Testing PyS60 example scripts
• Start the Python Script Shell
• Click Options / Run Script
• Choose one of the scripts in the list and hit OK
© 2007 Nokia
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Application development
basics
Tools of the trade - Windows
• Some version of Python installed and running -> ActivePython
(www.activestate.com) comes with Python 2.5.1, PyWin editor
and Python shell.
• S60 Platform SDKs for Symbian OS, for C++ -> provides PCbased emulation environment for creating and running scripts
and Python extensions (www.forum.nokia.com/tools)
• Package PythonForS60_1_4_4_SDK_3rdEd.zip for plugging
Python into the S60 SDK
• Packaging tool for creating .SIS installable files (Ensymble http://www.nbl.fi/~nbl928/ensymble.html) – Py2sis tool comes
with the SDK, not usable outside Windows
• If using Ensymble, OpenSSL command-line utilities ->
http://www.stunnel.org/download/binaries.html
• S60 device with optional memory card
• Nokia PC Suite – optional but a timesaver
© 2007 Nokia
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Basic development cycle - Windows
• Create a .py file using
PyWin containing valid
Python for S60 code
• Save it to
C:\Symbian\9.1\S60_3rd_
MR\Epoc32\winscw\c\pytho
n
• Start the S60 SDK
Emulator
• Click on the Python Script
Shell, choose your script
from the list
• Click “Select” to run it
© 2007 Nokia
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Tools of the trade - Linux
• Some version of Python installed and running
• Emulation environment not available
• Packaging tool for creating .SIS installable files
(Ensymble - http://www.nbl.fi/~nbl928/ensymble.html)
+ OpenSSL command line utilities
• PyS60-compat – Emulation library for some PyS60
APIs (http://sourceforge.net/projects/pys60-compat/)
• S60 device. Having a memory card greatly facilitiates
script testing
• Bluetooth-enabled workstation
© 2007 Nokia
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Basic development cycle - Linux
• Create a .py file using any
text editor
• Send your script to the
E:\Python phone using
obexftp or connecting the
phone as a usb drive
• Start Python Script Shell
• Choose your script from
the list
• Click “Select” to run it
• No emulator, you have to
run your script on the
phone, or with PyS60compat
© 2007 Nokia
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Creating a Stand-alone Python Application
• Easiest: Ensymble
• http://www.nbl.fi/~nbl928/ensymble.html
• For S60 3rd Edition, PyS60 1.4.0 or later
• Linux, Mac, Windows
• py2sis with standard PyS60 source
distribution
• Both tools create a .sis file which can be
installed on the phone as a native application,
appear in the main menu and have its own
C:\dev\python>ensymble_python2.5-0.26.py py2sis
simplecube.py
icon
© 2007 Nokia
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Symbian OS 9.1 Platform Security – affects Python
• www.symbiansigned.com
• Accessing potentially sensitive features now requires
capabilities
•
•
•
•
•
Global key capture
Reading the cell ID
Reading the (internal) GPS location
Setting the system time
Protected File Access
• Need devcert (w/ Publisher ID) or Open Signed Online
•
•
•
•
Register with www.symbiansigned.com
Register your phone IMEI with the devcert
Sign your application with the devcert
Install your application on your phone
© 2007 Nokia
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PyS60 API Tour and Example
apps
Application framework basics
•Application type can be
used to access and modify
the UI = appuifw.app
• UI elements:
•
•
•
•
Title
Tabs
Body (Text, ListBox, Canvas)
LSK and RSK
• Define handlers for Options
menu and Exit key
• Wait for user input using an
Active Object lock – other
threads cannot access UI
© 2007 Nokia
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Application framework basics
• UI Controls are implemented
as Python types:
• ListBox
• Text
• Canvas
• Controls are set to the
application body (using
app.body = control)
• Dialogs are implemented as
module-level functions
• Form is a dialog
implemented as a type, due
to its versatility
• Content_handler object used
to open files of given types
© 2007 Nokia
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UI framework – Components
• Dialogs – notes, query, multi-query, popupmenu, selection list, multi-selection list
• Form
• Canvas
• Menus
• Text
• Listbox
© 2007 Nokia
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UI framework – Components
© 2007 Nokia
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Multimedia – audio, video, camera
• Multimedia applications can be developed
using modules:
• Audio – allows playing and recording of audio and text-tospeech functions
• Camera – for taking pictures, recording videos, controlling
camera aspects and querying camera capabilities
• Graphics – Image saving and loading
© 2007 Nokia
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Messaging and Inbox – sms
• Inbox module is used to
read through your
message Inbox
• Messaging module is for
sending SMS and MMS
messages
© 2007 Nokia
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Messaging and Inbox – sms example
Source: sms.py
import inbox, appuifw, inbox, messaging
box = inbox.Inbox()
for sms_id in box.sms_messages()[:5]:
msg = box.content(sms_id)
appuifw.note(msg)
messaging.sms_send("+551185417677", u"Hello Bossa!")
© 2007 Nokia
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Connectivity: Bluetooth, TCP, HTTP
• Python applications can
use standard socket
module for communication,
via Bluetooth, TCP, etc.
• High-level urllib can be
used for HTTP and Web
commnucations
Demo: Tracker
© 2007 Nokia
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Connectivity – urllib
Source: webclient.py
import urllib, appuifw, e32
URL = "http://www.python.org/images/python-logo.gif"
dest_file = u"C:\\Data\\Images\\python-logo.gif"
urllib.urlretrieve(URL, dest_file)
lock = e32.Ao_lock()
viewer = appuifw.Content_handler(lock.signal)
viewer.open(dest_file)
lock.wait()
© 2007 Nokia
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Connectivity – bluetooth photo sender
Source: bluetooth.py
import camera, e32, socket, appuifw
PHOTO = u"C:\\Data\\Images\\bt_photo_send.jpg"
def send_photo():
try:
address, services = socket.bt_obex_discover()
except:
appuifw.note(u"OBEX Push not available", "error")
return
if u'OBEX Object Push' in services:
channel = services[u'OBEX Object Push']
socket.bt_obex_send_file(address, channel, PHOTO)
appuifw.note(u"photo sent", "info")
else:
appuifw.note(u"OBEX Push not available", "error")
© 2007 Nokia
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Many more! Explore the API
• Positioning
• Location
• E32dbm
• Telephone
• Contacts
• Sensor…
Demo: Shake your
music
© 2007 Nokia
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Conclusion
• Introduction to the Python Language
www.python.org/doc
• Examples from
http://www.mobilepythonbook.com
• http://wiki.forum.nokia.com/index.php/Category:Pytho
n
• http://wiki.opensource.nokia.com/projects/Python_for_
S60
• http://mobilepythonbook.com/
• http://croozeus.googlepages.com/py60
© 2007 Nokia
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Backup
UI framework – Dialog notes and queries
Source: notes.py
import appuifw, time
##### note
appuifw.note(u"Hello!",'info') ## may also take 'error' and 'conf'
##### query
name = appuifw.query(u"Type your name:",'text',"Daniel")
age = appuifw.query(u"Type your age:",'number')
date = appuifw.query(u"Type a date:",'date')
code = appuifw.query(u"Type a password:",'code')
query = appuifw.query(u"Wanna see your data?",'query')
timetuple = time.localtime(date)
input = u"You name is: %s, your age is: %s, year is %s, pwd is %s" %
(name, age, timetuple[0],code)
if query:
appuifw.note(input)
else:
appuifw.note(u"Insensitive clod!",'error')
© 2007 Nokia
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UI framework – List dialogs
Source: lists.py
import appuifw
##### popup
fruits = [u"Apple",u"Banana",u"Orange"]
index = appuifw.popup_menu(fruits,u"Select a fruit:")
if index in range(len(fruits)):
appuifw.note(u"You've chosen:" + fruits[index])
##### selection list
phones = [u"Nokia",u"Nokia",u"The ones from Finnish company"]
index = appuifw.selection_list(phones,0)
if index in range(len(phones)):
appuifw.note(u"You've chosen:" + phones[index])
##### multi selection with search
cars = [u"Ferrari",u"Lamborghini",u"McLaren",u"Renault"]
selections = appuifw.multi_selection_list(cars,'checkbox',1) ## search field
result = ""
if len(selections) > 0:
for x in selections:
result+= cars[x] + ","
appuifw.note(u"Your choices:"+result[:-1])
else:
appuifw.note(u"You don't like cars")
© 2007 Nokia
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Application framework – Basic application
example
Source: app1.py
import appuifw, e32
##handler for Exit
def quit():
appuifw.note(u"Application exiting...")
app_lock.signal()
##sets app UI title
appuifw.app.exit_key_handler = quit
appuifw.app.title = u"Hello!!!"
appuifw.note(u"Application has been started...")
##wait for input
app_lock = e32.Ao_lock()
app_lock.wait()
© 2007 Nokia
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UI framework – Menu example
Source: menu.py
import appuifw, e32
##menu
def menu_choice1():
appuifw.note(u"Choice 1")
def menu_choice2():
appuifw.note(u"Choice 2")
def menu_choice3():
appuifw.note(u"Choice 3")
## main
mymenu = [(u"Choice 1",menu_choice1),
(u"Choice 2",menu_choice2),
(u"Choice 3",((u"Sub-choice",menu_choice3),
(u"Sub-choice1",menu_choice1)))]
appuifw.app.menu = mymenu
© 2007 Nokia
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UI framework – Text example
Source: text.py
##sets Text
tx=appuifw.Text()
tx.color=(0,0,128)
tx.font=u'LatinBold17'
tx.style = appuifw.STYLE_BOLD
tx.set(u"Text")
## new color and style
tx.color=(0,0,0)
tx.style = appuifw.STYLE_ITALIC
tx.add(u"Italic!")
## new font
tx.font = u"albi17b" #
tx.add(u"Albi17b text!")
appuifw.app.body = tx
## Code for handling exit key omitted
© 2007 Nokia
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UI framework – ListBox example
Source: listbox.py
import appuifw, e32
##handler for Exit
def quit():
appuifw.note(u"Application exiting...")
app_lock.signal()
##sets app UI title
appuifw.app.exit_key_handler = quit
appuifw.app.title = u"Hello!!!"
##callback
def lbox_observe():
appuifw.note(u"You have chosen " + entries[listBox.current()][0])
##sets ListBox
icon1 = appuifw.Icon(u'z:\\resource\\apps\\avkon2.mbm', 28, 29)
icon2 = appuifw.Icon(u'z:\\resource\\apps\\avkon2.mbm', 40, 41)
entries = [(u"Signal", icon1),
(u"Battery", icon2)]
listBox = appuifw.Listbox(entries, lbox_observe)
appuifw.app.body = listBox
© 2007 Nokia
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Multimedia framework – audio example
Source: audio.py
import appuifw, audio, os
MENU = [u"Play",u"Record",u"Delete",u"Say!"]
SOUNDFILE = u'C:\\Data\\Images\\sound.wav'
sound = None
while True:
index = appuifw.popup_menu(MENU,u"Select operation")
if sound:
sound.stop()
sound = audio.Sound.open(SOUNDFILE)
if index == 0:
sound.play()
sound.close()
elif index == 1:
sound.record()
appuifw.query(u"Press OK to stop",'query')
sound.stop()
sound.close()
elif index == 2:
os.remove(SOUNDFILE)
© 2007 Nokia
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Multimedia framework – camera example
Source: camera.py
import e32, camera, appuifw, key_codes
def viewfinder(img):
canvas.blit(img)
def shoot():
camera.stop_finder()
photo = camera.take_photo(size = (640, 480))
w, h = canvas.size
canvas.blit(photo, target = (0, 0, w, 0.75 * w), scale = 1)
photo.save('e:\\Images\\photo.jpg')
appuifw.app.body = canvas = appuifw.Canvas()
appuifw.app.title = u"Camera"
camera.start_finder(viewfinder)
canvas.bind(key_codes.EKeySelect, shoot)
© 2007 Nokia
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Multimedia framework – camera example
Source: video.py
import e32, camera, appuifw, key_codes, time
def viewfinder(img):
canvas.blit(img)
def shoot():
camera.start_record("C:\\Data\\Videos\\video.mp4",donothing)
appuifw.query(u"Press OK to stop",'query')
camera.stop_record()
def donothing(a,b):
pass
canvas = appuifw.Canvas()
appuifw.app.body = canvas
appuifw.app.title = u"Camera"
camera.start_finder(viewfinder)
canvas.bind(key_codes.EKeySelect, shoot)
© 2007 Nokia
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Messaging and Inbox – sms example
Source: sms.py
import inbox, appuifw, inbox, messaging
box = inbox.Inbox()
for sms_id in box.sms_messages()[:5]:
msg = box.content(sms_id)
appuifw.note(msg)
messaging.sms_send("+551185417677", u"Hello Bossa!")
© 2007 Nokia
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Connectivity – urllib
Source: webclient.py
import urllib, appuifw, e32
URL = "http://www.python.org/images/python-logo.gif"
dest_file = u"C:\\Data\\Images\\python-logo.gif"
urllib.urlretrieve(URL, dest_file)
lock = e32.Ao_lock()
viewer = appuifw.Content_handler(lock.signal)
viewer.open(dest_file)
lock.wait()
© 2007 Nokia
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Connectivity – bluetooth photo sender
Source: bluetooth.py
import camera, e32, socket, appuifw
PHOTO = u"C:\\Data\\Images\\bt_photo_send.jpg"
def send_photo():
try:
address, services = socket.bt_obex_discover()
except:
appuifw.note(u"OBEX Push not available", "error")
return
if u'OBEX Object Push' in services:
channel = services[u'OBEX Object Push']
socket.bt_obex_send_file(address, channel, PHOTO)
appuifw.note(u"photo sent", "info")
else:
appuifw.note(u"OBEX Push not available", "error")
© 2007 Nokia
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Thank you!
Questions?
[email protected]