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Outreach program at UofC with Mark Oreglia.

Basic computer programming:
  • concepts
  • simple program
  • cannon game
  • plotting

core concepts of writing computer programs--variables, decisions, loops, functions, and objects--

Installing Python and PyGame

on a Mac OS X 10.6

Couple of attempts failed (system python, python3)

MacPort worked after some tweaks.

If you don't have MacPort (aka Darwinport), check http://www.macports.org/install.php and use the .dmg installation package.

Once you have MacPort tart installing python2.6, numpy and py-game:
sudo port install python2.6
sudo port install py26-numpy
sudo port install py26-game
# probably will end with an error:
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_python_py26-game/work/pygame-1.9.1release" && /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin/python2.6 setup.py --no-user-cfg build " returned error 1
...
src/pypm.c:136:22: error: porttime.h: No such file or directory
...
error: command '/usr/bin/gcc-4.2' failed with exit status 1

Error: Status 1 encountered during processing.
Before reporting a bug, first run the command again with the -d flag to get complete output.
Edit the Setup file to remove pypm (comment out the line compiling pypm.c) and retry the build. This time it should work.
pushd /opt/local/var/macports/build/
cd _opt_local_var_macports_sources_rsync.macports.org_release_ports_python_py26-game/work/pygame-1.9.1release/
sudo port install py26-game
# should complete succesfully
popd

Windows

Download and install the followings: Detailed instructions are at http://pygame.org/install.html

Packages to install: Editor To test:

VPython

Alternatively you can use Portable Python: http://www.portablepython.com/ The recommended editor is SciTE

The game

Evaluating some games:

This is a simple cannon game: http://shellfire.sourceforge.net/ 
/opt/local/bin/python2.6 main.py

Counting words 

def read_text(filename):
  f = open(filename)
  my_text = f.readlines().split()
  return my_text

def count_word(text, word):
  counter = 0
  for w in text:
    if w==word:
      counter += 1
  return counter

def find_important_words(text):
  word_list = []
  text_summary = []
  for w in text:
    if len(w)>2 and w not word_list:
      word_list.append(w)
      occurrences = count_word(text, w)
      text_summary.append((w, occurrences))
  return text_summary

def main():
  EMPTY_LIST = (0, 0, 0)
  file_names = ['text1', 'text2', 'text3']
  for fn in file_names:
    ft = read_text(fn)
    text_index = find_important_words(ft)
    for i in text_index:
      w = i[0]
      occ = i[1]
      if not i_index.has_key(w):
        i_index[w] = EMPTY_LIST
      i_index[w][j] = occ
      #  i_index[w][j] = occ/len(ft)
  # print table
  print file_names
  for w, line in i_index:
    print "%s: %s" % (w, line)

-- MarcoMambelli - 28 Jun 2010
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Topic revision: r3 - 01 Jul 2010, MarcoMambelli
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