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Modules are python files (*.py) that can be imported in a script. Packages are collections of modules within a single namespace. If you like, read up on the exact definitions here or here.

It can be handy to build your own package. For example: you have build a set of scripts for a specific project. Let's say Project X. For Project X you have written some scripts for

• input of specific data (inputX.py)
• output to a format the client specifically requested (outputX.py)
• tailored plots (plotX.py)

To keep track of these functions for this project, you want to build a single package containing these functions. This can easily be achieved without leaving DeltaShell.

Writing a module

1. Open DeltaShell
2. In the Toolbox, create a new script in the upper 'Scripts' directory and name it 'outputX'

3. Copy-paste the following dummy function and save the file:

   Code Block
   language py
   def dummyX(): print "Hello World!"

4. Create a new script called 'runfile'

5. In runfile, we will import outputX and run the dummyX function:

   Code Block
   language py
   import outputX outputX.dummyx()

   In the Messages window, you will see the 'Hello World' output appear. We have imported 'outputX' as a module.

Writing a package

1. To make a package, insert a new folder in the scripts folder and name it 'ProjectX:
   Image Added
2. To move 'outputX' to the new 'ProjectX' package, right click on 'outputX' and select 'Open location with windows explorer'.
3. In windows explorer, cut-paste outputX.py in the ProjectX directory. The directory structure should now look like this:
   
   Image Added
4. To use the dummyX function, change the code in runfile.py to:

from ProjectX import outputX

outputX.dummyx()

Congratulations! You have written your own Python package with DeltaShell.

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