ExtractZip

Extract Slides, Exercises, Solutions, TestExams or Exams!

Installation

1. Create the user extractzip and set the access rights for the home directory.

# as user root:
adduser --disabled-password extractzip
chmod 2771 ~extractzip

2. Add extractzip group to admin users that want to use this tool.

# as user root:
adduser jupyter-sebastian extractzip

3. Create the config directory and file and set access rights and ownership.

# as user root
mkdir /etc/extractzip
chmod 755 /etc/extractzip
touch /etc/extractzip/config.yaml
chmod 664 /etc/extractzip/config.yaml
chown  extractzip:extractzip /etc/extractzip/config.yaml

4. Edit the config file, where you specify the base_path (home directory of extractzip) and the courses. Each course has a name (the directory in base_path) that follows the pattern ^[a-z0-9_]+$ and optional entries for slides, exercises, solutions, testexam and exam which points to the basename of the corresponding zip file.

# as admin user with extractzip group (e.g. jupyter-sebastian)

# You can see here an course with the name 'testcourse'.
# The exam is commented out -> it can't be downloaded yet.

# /etc/extractzip/config.yaml

---
base_path: /home/extractzip
courses: 
  - name: testcourse
    slides: Slides.zip
    examples: Examples.zip
    exercises: Exercises.zip
    solutions: Solutions.zip
    # exam: Exam.zip
    testexam: Testexam.zip

5. Create the corresponding directory for the configured course, copy the zip files in it and set the correct access rights.

# as admin user with extractzip group (e.g. jupyter-sebastian)

cd ~extractzip
mkdir testcourse
chmod 2751 testcourse

# copy zipfiles to new directory from <src_dir>
cp <src_dir>/{Exercises,Solutions,Exam,Testexam}.zip testcourse/.
chmod 644 testcourse/*.zip

Check config, course directory and zip files

Run the following command with the course directory to check:

CheckExtractZip testcourse

The result of the checks will be prefix with an emoji to indicate success (🤩), failure (👿) or the zipfile is not yet in the course directory (💀). The last one is not an error (see the third example below).

If everything is ok, the output should look like this (make sure that the last line reads Check complete!):

-----Course name----------------------------------
  🤩  The course name 'testcourse' is well formed.
-----Check config file----------------------------
  🤩  Config file loaded.
-----Check base path------------------------------
  🤩  Base path is ok.
-----Check course 'testcourse' directory----------
  🤩  Course path is ok.
-----Check Exercises in course 'testcourse'-------
  🤩  Exercises is defined in the config.
  🤩  The file Exercises.zip is ok.
  🤩  The file Exercises.zip is not encrypted.
-----Check Solutions in course 'testcourse'-------
  🤩  Solutions is defined in the config.
  🤩  The file Solutions.zip is ok.
  🤩  The file Solutions.zip is not encrypted.
-----Check Exam in course 'testcourse'------------
  🤩  Exam is defined in the config.
  🤩  The file Exam.zip is ok.
  🤩  The file Exam.zip is encrypted.
-----Check TestExam in course 'testcourse'--------
  🤩  TestExam is defined in the config.
  🤩  The file Testexam.zip is ok.
  🤩  The file Testexam.zip is encrypted.
--------------------------------------------------
Check complete!

If the result is not ok, the output looks something like this (make sure the last line reads Check incomplete!):

-----Course name----------------------------------
  🤩  The course name 'testcourse' is well formed.
-----Check config file----------------------------
  🤩  Config file loaded.
-----Check base path------------------------------
  🤩  Base path is ok.
-----Check course 'testcourse' directory----------
  🤩  Course path is ok.
-----Check Exercises in course 'testcourse'-------
  🤩  Exercises is defined in the config.
  👿  Exercises.zip mode is 444 but it should be 644
-----Check Solutions in course 'testcourse'-------
  🤩  Solutions is defined in the config.
  🤩  The file Solutions.zip is ok.
  🤩  The file Solutions.zip is not encrypted.
-----Check Exam in course 'testcourse'------------
  🤩  Exam is defined in the config.
  🤩  The file Exam.zip is ok.
  🤩  The file Exam.zip is encrypted.
-----Check TestExam in course 'testcourse'--------
  🤩  TestExam is defined in the config.
  🤩  The file Testexam.zip is ok.
  🤩  The file Testexam.zip is encrypted.
--------------------------------------------------
Check incomplete!

If you see lines like the following than it means, you have not put the configured zipfile for TestExam in the course directory.

This is not an error because you could have intentionally withheld the file until it is convenient during the course:

-----Check TestExam in course 'testcourse'--------
  🤩  TestExam is defined in the config.
  💀  The TestExam doesn't exist (yet).
--------------------------------------------------

Using the ExtractZip package

The ExtractZip class has the following general method for extracting a specific zip file:

ExtractZip().extract_<lang>_<zip_type>_<course>()

Where

• <lang> is either de for german or en for english,
• <exam_type> is either slides, examples, exercises, solutions, testexam or exam and
• <course> is the name of the course from the config.yaml.

In a Jupyter Notebook you can put the following in a cell to extract the slides of the testcourse with english output:

from extractzip import ExtractZip
ExtractZip().extract_en_slides_testcourse()

When the cell is executed, the corresponding zipfile will be extracted in the home directory of the current user.

Note

This project has been set up using PyScaffold 4.5. For details and usage information on PyScaffold see https://pyscaffold.org/.