Assignment 6

Question

Recall the s2m script interpretation system described in Assignment #5. In this system, there are 3 types of files (matrices, operation-specifications, and scripts) and each has their own well-defined syntactic format. One may over time create directory trees incorporating multiple files of each type scattered over the tree, and it would be useful to check whether all s2m-system files in a given directory-tree satisfy their respective formats.

Write and document a Python script s2m_check.py which takes as a command-line argument a directory-path, checks each s2m-system file in the directory-tree rooted at that path for syntactic correctness, and, for each error found (maximum of one per file), prints the name of that file and a short descriptive message. The list of errors should be sorted by filename. If a command-line argument is not given, the check should proceed from the current working directory. Where possible, define your own functions to simplify code structure; when you do, make sure these functions are documented with their own doc-strings and (where necessary) internal comments. Your script must work on all s2m files from Assignment #5 and the s2m files flaw1.s2m, flaw2.s2m, flaw3.s2m, flaw4.s2m, flaw5.s2m, flaw6.s2ms, flaw7.s2ms, flaw8.s2ms, flaw9.s2ms, flaw10.s2ms, flaw11.s2ms, flaw12.s2ms, flaw13.s2mop, flaw14.s2mop, and flaw15.s2mop to produce the output given in typescript-file s2m_check.script. You may assume that all given datafiles are readable.

Hints

You may find the functions and variables provided by the os, os.path, and re modules of use.

Submission

Please hand in printed copies of all of your Python script files. You must also submit these files electronically using the submit-assignment command. At the top of each script, please include a triple-quoted docstring with your name and student number, the name of this course and the assignment number, and a brief description of your program; also include brief comments throughout your program describing various code-blocks. You do not have to develop your code on our CS departmental systems. However, as your code will be compiled and tested on our CS departmental systems (which use Python Version 2.4) as part of the assignment marking process, you should ensure that your code compiles and runs correctly on at least one of these systems.

Additional Notes:

• Mar 5, 9:00am
  Assignment #6 posted.

Created: March 5, 2008
Last Modified: March 5, 2008