Book Image

The Python Apprentice

By : Robert Smallshire, Austin Bingham
Book Image

The Python Apprentice

By: Robert Smallshire, Austin Bingham

Overview of this book

Experienced programmers want to know how to enhance their craft and we want to help them start as apprentices with Python. We know that before mastering Python you need to learn the culture and the tools to become a productive member of any Python project. Our goal with this book is to give you a practical and thorough introduction to Python programming, providing you with the insight and technical craftsmanship you need to be a productive member of any Python project. Python is a big language, and it’s not our intention with this book to cover everything there is to know. We just want to make sure that you, as the developer, know the tools, basic idioms and of course the ins and outs of the language, the standard library and other modules to be able to jump into most projects.
Table of Contents (21 chapters)
Title Page
Credits
About the Authors
www.PacktPub.com
Customer Feedback
Preface
12
Afterword – Just the Beginning

tuple – an immutable sequence of objects


Tuples in Python are immutable sequences of arbitrary objects. Once created, the objects within them cannot be replaced or removed, and new elements cannot be added.

Literal tuples

Tuples have a similar literal syntax to lists, except that they are delimited by parentheses rather than square brackets. Here is a literal tuple containing a string, a float and an integer:

>>> t = ("Norway", 4.953, 3)
>>> t
('Norway', 4.953, 3)

Tuple element access

We can access the elements of a tuple by zero-based index using square brackets:

>>> t[0]
'Norway'
>>> t[2]
3

The length of a tuple

We can determine the number of elements in the tuple using the built-in len() function:

>>> len(t)
3

 

Iterating over a tuple

We can iterate over it using a for-loop:

>>> for item in t:
>>>    print(item)
Norway
4.953
3

Concatenating and repetition of tuples

We can concatenate tuples using the plus operator:

>>> t + (338186...