Gain insights into Python 3's new syntax, data types, strings, bytes, and iterators through interactive coding samples. Upgrade your Python skills with hands-on, real-time code modifications.

Are you ready to take the plunge into Python 3? You might be just getting started with Python or you might be someone who understands Python2 and now wants to upgrade to Python 3. This course is designed to help you achieve your goal faster.

Learn about the new syntax, data types, strings, bytes, iterators and much more with interactive coding samples. Execute code using interactive playgrounds, modify the code to see your changes in action and get yourself upgraded to the newest version of Python that is here to stay for a while.

This course is derived from Dive into Python 3 by Mark Pilgrim. See License for more details.
Dive in and become a Python expert!

Python 3: An interactive deep dive

[Sets](https://www.educative.io/courses/python-3-an-interactive-deep-dive/sets/) make it trivial to find the unique items in a sequence.

a_list = ['The', 'sixth', 'sick', "sheik's", 'sixth', "sheep's", 'sick']
print (set(a_list) )                                #①
#{'sixth', 'The', "sheep's", 'sick', "sheik's"}

a_string = 'EAST IS EAST'
print (set(a_string) )                              #②
#{'A', 'E', 'S', ' ', 'T', 'I'}

words = ['SEND', 'MORE', 'MONEY']
print (''.join(words))                              #③
#SENDMOREMONEY

print (set(''.join(words))  )                       #④
#{'R', 'M', 'E', 'S', 'Y', 'O', 'N', 'D'}


①	Given a list of several strings, the `set()` function will return a set of unique strings from the list. This makes sense if you think of it like a for loop. Take the first item from the list, put it in the set. Second. Third. Fourth. Fifth — wait, that’s in the set already, so it only gets listed once, because Python sets don’t allow duplicates. Sixth. Seventh — again, a duplicate, so it only gets listed once. The end result? All the unique items in the original list, without any duplicates. The original list doesn’t even need to be sorted first.

②	The same technique works with strings, since a string is just a sequence of characters.

③	Given a list of strings, ''`.join(a_list)` concatenates all the strings together into one.

④	So, given a list of strings, this line of code returns all the unique characters across all the strings, with no duplicates.

The alphametics solver uses this technique to build a set of all the unique characters in the puzzle.

Your First Python Program

Native Datatypes

Comprehensions

Strings

Regular Expressions

Closures & Generators

Classes & Iterators

Advanced Iterators

Unit Testing

Refactoring

Files

XML

Serializing Python Objects

HTTP Web Services

Case Study: Porting chardet to Python 3

Packaging Python Libraries

Appendix : Where To Go From Here

Finding the unique items in a sequence