adding class notes and beginning of unicode lab

Author: saschwafel

Students/SSchwafel/Notes/12092014.notes

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+Notes - 12/9/2014
+====================
+
+Unicode and the Persistence of Serialization
+---  
+
+   Projects Due at the end of this week! - Friday
+
+Anything is bytes <-- if it's stored on a disk or sent over a network, it's bytes
+
+Unicode makes it easier to deal with bytes
+
+Used to be able to fit everything into a two byte integer, (65,536 chars.) 
+
+Variety of encodings -> way of going between the canonical name of a character, and how it's stored in memory
+
+Py2 strings are a sequence of bytes - Unicode strings are sequences of platonic characters
+
+Platonic characters cannot be written to disk or network 
+
+
+Python has both str and unicode
+
+Two ways to work with binary data:
+
+str and bytes() and bytearray
+
+In Python 3 bytes and strings are completely different!
+
+Unicode object lets you work with characters - all the same methods as the string object
+    
+    Encoding is converting from unicode object to bytes
+
+    Decoding is converting from bytes to a unicode object
+
+    
+import codects
+#encoding and decoding stuff
+
+codecs.encode()
+codecs.decode()
+codecs.open() #better to use io.open
+
+Use Unicode in  your source files - 
+
+    #-*- coding: utf-8 -*-
+
+The Trick in Using Unicode - Be Consistent:
+
+    Always unicode, never Python strings
+
+    Do the decoding when you input your data
+
+        Decode on input
+        
+        Encode on output
+
+    
+        get default encoding - sys.getdefaultencoding()
+
+
+from __future__ import unicode_literals #<----after running this line u'' is assumed!
+
+    -be aware that you can still get Python 2 strings from other places...
+
+JSON Requires UTF-8!
+
+In Python 3, all strings are unicode
+
+Py3 has two distinct concepts: 
+
+    text - uses str object
+    binary data - uses bytes 
+
+

Students/SSchwafel/session10/ICanEatGlass.utf81.txt

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+I Can Eat Glass:
+
+And from the sublime to the ridiculous, here is a certain phrase in an assortment of languages:
+
+Sanskrit: काचं शक्नोम्यत्तुम् । नोपहिनस्ति माम् ॥
+
+Sanskrit (standard transcription): kācaṃ śaknomyattum; nopahinasti mām.
+
+Classical Greek: ὕαλον ϕαγεῖν δύναμαι· τοῦτο οὔ με βλάπτει.
+
+Greek (monotonic): Μπορώ να φάω σπασμένα γυαλιά χωρίς να πάθω τίποτα.
+
+Greek (polytonic): Μπορῶ νὰ φάω σπασμένα γυαλιὰ χωρὶς νὰ πάθω τίποτα. 
+
+Latin: Vitrum edere possum; mihi non nocet.
+
+Old French: Je puis mangier del voirre. Ne me nuit.
+
+French: Je peux manger du verre, ça ne me fait pas mal.
+
+Provençal / Occitan: Pòdi manjar de veire, me nafrariá pas.
+
+Québécois: J'peux manger d'la vitre, ça m'fa pas mal.

Students/SSchwafel/session10/unicode_lab.py

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+#!/usr/bin/python
+
+file = open('/home/schuyler/PythonFolder/session10/ICanEatGlass.utf81.txt', 'rw')
+
+unicode_string = u'bananas'.encode('utf-8')
+
+unicode_chess_piece = u'\u2654'
+
+unicode_chess_piece = unicode_chess_piece.encode('utf-8')
+
+print unicode_chess_piece
+
+#print unicode_string
+
+print file.read()
+
+file.write(unicode_chess_piece)
+
+print file.read()
+
+file.close()

Students/SSchwafel/session10/unicode_lab.py~

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+#!/usr/bin/python
+
+file = open('/home/schuyler/PythonFolder/session10/ICanEatGlass.utf81.txt', 'rw')
+
+unicode_string = u'bananas'.encode('utf-8')
+
+unicode_chess_piece = u'\u2654'
+
+unicode_chess_piece = unicode_chess_piece.encode('utf-8')
+
+print unicode_chess_piece
+
+#print unicode_string
+
+print file.read()
+
+file.write(unicode_chess_piece)
+
+print file.read()
+
+file.close()