updated homework, etc. for session4

Author: PythonCHB

slides_sources/source/exercises/file_lab.rst

@@ -0,0 +1,51 @@
+.. _exercise_file_lab:
+
+********
+File LAB
+********
+
+A bit of practice with files
+============================
+
+Goal:
+-----
+
+Get a little bit of practice with handling files and parsing simple text.
+
+
+Paths and File Processing
+--------------------------
+
+* write a program which prints the full path to all files in the current
+  directory, one per line
+
+* write a program which copies a file from a source, to a destination
+  (without using shutil, or the OS copy command)
+
+  - advanced: make it work for any size file: i.e. don't read the entire
+    contents of the file into memory at once.
+
+  - Note that if you want it to do any kind of file, you need to open the files in binary mode:
+    ``open(filename, 'rb')`` (or ``'wb'`` for writing.)
+
+
+File reading and parsing
+------------------------
+
+
+In the class repo, in:
+
+``Examples/Session01/students.txt``
+
+You will find the list I generated in the first class of all the students in the class, and what programming languages they have used in the past.
+
+Write a little script that reads that file, and generates a list of all
+the languages that have been used.
+
+Extra credit: keep track of how many students specified each language.
+
+If you've got git set up right, ``git pull upstream master`` should update
+your repo. Otherwise, you can get it from gitHub:
+
+https://github.com/UWPCE-PythonCert/IntroPython2016/blob/master/Examples/Session01/students.txt
+

slides_sources/source/exercises/index.rst

@@ -34,6 +34,7 @@ Session 4:
     :maxdepth: 1
 
     dict_lab
+    file_lab
     kata_fourteen
 
 Session 5:

slides_sources/source/exercises/mailroom.rst

@@ -99,3 +99,60 @@ directory, and add it to your clone early. Make frequent commits with
 good, clear messages about what you are doing and why.
 
 When you are done, push your changes and make a pull request.
+
+.. _exercise_mailroom_plus:
+
+Adding dicts...
+---------------
+
+
+For the next week (after Session04)
+
+You should have been able to do all that with the basic data types:
+
+numbers, strings, lists and tuples.
+
+But once you've learned about dictionaries (Session04) you may be able to re-write it a bit more simply and efficiently.
+
+ * Update mailroom from last week to:
+
+  - Use dicts where appropriate
+  - Write a full set of letters to everyone to individual files on disk
+  - See if you can use a dict to switch between the users selections
+  - Try to use a dict and the .format() method to do the letter as one
+    big template -- rather than building up a big string in parts.
+
+Example:
+
+.. code-block:: ipython
+
+  In [3]: d
+  Out[3]: {'first_name': 'Chris', 'last_name': 'Barker'}
+
+
+  In [5]: "My name is {first_name} {last_name}".format(**d)
+  Out[5]: 'My name is Chris Barker'
+
+Don't worry too much about the "**" -- we'll get into the details later, but for now, it means, more or less -- pass this whole dict in as a bunch of keyword arguments.
+
+
+.. _exercise_mailroom_exeptions:
+
+Adding Exceptions
+-----------------
+
+**After Session05:**
+
+* Exceptions:
+
+Now that you've learned about Exception handling, you can update your code to handle errors better -- like when a user inputs bad data.
+
+* Comprehensions:
+
+Can you use comprehensions to clean up your code a bit?
+
+* Tests
+
+Add some tests..
+
+

slides_sources/source/session04.rst

@@ -980,25 +980,8 @@ LAB
 
 Files Lab: If there is time.
 
-Files Lab
----------
+:ref:`exercise_file_lab`
 
-In the class repo, in:
-
-``Examples\students.txt``
-
-You will find the list I generated of all the students in the class, and
-what programming languages they have used in the past.
-
-Write a little script that reads that file, and generates a list of all
-the languages that have been used.
-
-Extra credit: keep track of how many students specified each language.
-
-If you've got git set up right, ``git pull upstream master`` should update
-your repo. Otherwise, you can get it from gitHub:
-
-``https://github.com/UWPCE-PythonCert/IntroPython2015/blob/master/Examples/students.txt``
 
 
 =========
@@ -1007,67 +990,21 @@ Homework
 
 Recommended Reading:
 ---------------------
-  * Dive Into Python: Chapt. 13,14
-
-Assignments:
--------------
-
- * Finish the dict/sets lab
- * Coding kata: trigrams
- * Paths and files
- * Update mailroom with dicts
-
-
-Text and files and dicts, and...
----------------------------------
-
-* Coding Kata 14 - Dave Thomas
-
-    http://codekata.com/kata/kata14-tom-swift-under-the-milkwood/
-
-    and in this doc:
 
-    :doc:`./exercises/kata_fourteen`
+  * Dive Into Python 3: Chapt. 2.7 (and 4 if you haven't already)
 
-    and on github here
+http://www.diveintopython3.net/native-datatypes.html#dictionaries
 
-    http://uwpce-pythoncert.github.io/IntroToPython/exercises/kata_fourteen.html
+  * Dive Into Python 3: Chapt. 11
 
-.. nextslide::
-
-* Use The Adventures of Sherlock Holmes as input:
-
-    :download:`./exercises/sherlock.txt`
-
-    and on github here:
+http://www.diveintopython3.net/files.html
 
-    http://uwpce-pythoncert.github.io/IntroToPython/_downloads/sherlock.txt
 
-* This is intentionally open-ended and underspecified. There are many interesting decisions to make.
-
-* Experiment with different lengths for the lookup key. (3 words, 4 words, 3 letters, etc)
-
-
-Paths and File Processing
---------------------------
-
-* write a program which prints the full path to all files in the current
-  directory, one per line
-
-* write a program which copies a file from a source, to a destination
-  (without using shutil, or the OS copy command)
-
-  - advanced: make it work for any size file: i.e. don't read the entire
-    contents of the file into memory at once.
-
-  - Note that if you want it to do any kind of file, you need to open the files in binary mode:
-    ``open(filename, 'rb')`` (or ``'wb'`` for writing.)
-
-* update mailroom from last week to:
+Assignments:
+-------------
 
-  - Use dicts where appropriate
-  - Write a full set of letters to everyone to individual files on disk
-  - See if you can use a dict to switch between the users selections
-  - Try to use a dict and the .format() method to do the letter as one
-    big template -- rather than building up a big string in parts.
+ * Finish the dict/sets lab: :ref:`exercise_dict_lab`
+ * Finish the files lab: :ref:`exercise_file_lab`
+ * Coding kata: trigrams: :ref:`exercise_trigrams`
 
+ * update mailroom with dicts :ref:`exercise_mailroom_plus`

slides_sources/source/session05.rst

@@ -128,7 +128,7 @@ So use names that make sense to the reader.
 Naming Guidelines
 -----------------
 
-Only use single-letter names for things with limited scope: indexes and teh like:
+Only use single-letter names for things with limited scope: indexes and the like:
 
 .. code-block:: python
 
@@ -201,6 +201,7 @@ Another Branching structure:
 
 Exceptions
 ----------
+
 Never Do this:
 
 .. code-block:: python
@@ -212,6 +213,8 @@ Never Do this:
     except:
         print "couldn't open missing.txt"
 
+**always** capture the particular Exception you know how to handle.
+
 
 Exceptions
 ----------
@@ -225,7 +228,7 @@ Don't do this:
     do_something()
     if os.path.exists('missing.txt'):
         f = open('missing.txt')
-        process(f)   # never called if file missing
+        process(f)
 
 It will almost always work -- but the almost will drive you crazy
 
@@ -252,7 +255,8 @@ So you can do
 Or let the Exception be raised....
 
 
-.. nextslide:: EAFP
+EAFP
+----
 
 
 "it's Easier to Ask Forgiveness than Permission"
@@ -264,6 +268,7 @@ http://www.youtube.com/watch?v=AZDWveIdqjY
 
 (PyCon talk by Alex Martelli)
 
+
 .. nextslide:: Do you catch all Exceptions?
 
 For simple scripts, let exceptions happen.
@@ -390,7 +395,6 @@ LAB
 
 Exceptions Lab:
 
-A number of you already did this -- so do it at home if you haven't
 
 :ref:`exercise_exceptions_lab`