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Learn Python in 7 Days

You're reading from   Learn Python in 7 Days Begin your journey with Python

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787288386
Length 280 pages
Edition 1st Edition
Languages
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Authors (2):
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Mohit Raj Mohit Raj
Author Profile Icon Mohit Raj
Mohit Raj
Bhaskar N. Das Bhaskar N. Das
Author Profile Icon Bhaskar N. Das
Bhaskar N. Das
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Toc

Table of Contents (12) Chapters Close

Preface 1. Getting Started with Python FREE CHAPTER 2. Type Variables and Operators 3. Strings 4. Lists 5. Dictionary 6. Control Statements and Loops 7. Function and Scope of Variable 8. Modules and Packages 9. File Handling and Exceptions 10. Collections 11. Class and Objects

Creating a list


Let's see how we can create an empty list:

<Variable name > = []
List1 = []

Creating a list with values

A list contains comma-separated values. For example:

Avengers = ['hulk', 'iron-man', 'Captain', 'Thor']

Unpacking list values

You can assign a list value to variables by using the assignment operator. Let's discuss this with an example:

>>> a,b = [1,2]

>>> a

1

>>> b

2

>>> 

You can see that 1 is assigned to variable a and 2 is assigned to variable b. This is called unpacking. What happens when a list is provided with more variables? Let's see the following example:

>>> a,b = [1,2,3]
Traceback (most recent call last):

  File "<pyshell#7>", line 1, in <module>

    a,b = [1,2,3]

ValueError: too many values to unpack

 The error indicates that there are more values to unpack. Let's see another example:

>>> a,b,c = [1,2]
Traceback (most recent call last):

  File "<pyshell#8>", line 1, in <module&gt...
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