Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


Amit Lavi
Amit Lavi
2,674 Points

Introducing Dictionaries before Python Sequences

I'm doing the 'Beginning Data Science Track', and the track shows to do the 'introducing Dictionaries' before 'Python Sequences'. However, in the description of the course, it says that the prerequisite for the course is python sequences. so, which one should I do first?

Also, in the python sequences course there is a prerequisite to take introducing tuples, which comes only later in the data science track.

So what is the correct order? and also, if someone from the treehouse team is reading - I think you should update the track in a way that will be more clear in regard to the correct order of courses.


1 Answer

Ben Slivinn
Ben Slivinn
10,156 Points

With my experience, I suggest you to start with:

  1. Python Sequences course.
  2. Introducing tuples.
  3. Dictionaries.

The reason is that Sequences will introduce you with the simplest iterables (lists and sets) (Mutable), the tuples are pretty same except the fact they are Immutable. Dictionaries are a little bit more complex.

Note if you familiar with other languages or JSON there is no significant difference, you can just go with treehouse's tracks.

Good luck!

Amit Lavi
Amit Lavi
2,674 Points

Thanks for the advice!