Lists are handy - they make it easy to store and manipulate data in as many dimensions as you need. In Python arrays are a powerful tool with a myriad of uses.
Debian comes with Python installed, so it's really quick to start programming.
micro lists.py
#lists.py cats = ['Tommy The Cat', 'Garfield', 'James'] print(cats)
kallet@confmansys:~/temp$ python3 lists.py ['Tommy The Cat', 'Garfield', 'James']
Python is quite versatile in what you can append to it's arrays. An array can have strings (as above, written between ''), floating point numbers (like 1.0), integers and even arrays inside arrays.
#lists.py cats = ['Tommy The Cat', 'Garfield', 'James'] print(cats) cats.append(1) cats.append(1.4) cats.append(['Lassie', 'Germany', 'Jane Fonda']) print(cats)
The printout shows that you can store anything in Python arrays.
kallet@confmansys:~/temp$ python3 lists.py ['Tommy The Cat', 'Garfield', 'James'] ['Tommy The Cat', 'Garfield', 'James', 1, 1.4, ['Lassie', 'Germany', 'Jane Fonda']]
Above we used the append-method, which adds an item to our list. You can also add data to a specific place in a list. The numbering starts with 0.
cats.insert(2, "Jerry") print(cats)
['Tommy The Cat', 'Garfield', 'Jerry', 'James', ['Lassie', 'Germany', 'Jane Fonda']]
As our print suggests, insert just moves all the following elements forward by 1 position after it has inserted our value. We can also reverse the situation and remove a single item from an array.
cats = ['Tommy The Cat', 'Garfield', 'James'] print (cats) cats.append(['Lassie', 'Germany', 'Jane Fonda']) print(cats) cats.insert(2, "Jerry") print(cats) cats.pop(2) print(cats)
['Tommy The Cat', 'Garfield', 'James'] ['Tommy The Cat', 'Garfield', 'James', ['Lassie', 'Germany', 'Jane Fonda']] ['Tommy The Cat', 'Garfield', 'Jerry', 'James', ['Lassie', 'Germany', 'Jane Fonda']] ['Tommy The Cat', 'Garfield', 'James', ['Lassie', 'Germany', 'Jane Fonda']]
You can find more methods here.
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