#100DaysOfCode in Python Transcripts
Chapter: Appendix: Python language concepts
Lecture: Concept: Tuples

Login or purchase this course to watch this video and the rest of the course contents.
0:01 Tuples are a lightweight, immutable data structure in Python that's kind of like a list but that can't be changed once you create them.
0:08 And you'll see many very cool techniques that make Python readable and easy to use are actually clever applications of tuples.
0:17 On the first line here, we are defining a tuple m, the way you define a tuple is you list out the values and you separate them by commas.
0:24 When you look at it, it appears like the parenthesis are part of the definition, and when you print tuples you'll see that the parenthesis do appear
0:32 but it's not actually the parenthesis that create them, it's the commas. We want to get the value out over here we want to get the temperature,
0:38 which is the first value, we would say m[0], so zero-based index into them. If we want the last value, the fourth one,
0:45 we would say m[3], that's the quality of the measurements. Notice below we are redefining m, this time without the parentheses,
0:51 just the commas and we print it out and we get exactly the same thing again, so like I said, it's the commas that define the tuple not the parentheses,
0:59 there is a few edge cases where you will actually need to put the parentheses but for the most part, commas. Finally, tuples can be unpacked,
1:08 or assigned to a group of variables that contain the individual values. So down here you can see we have a "t" for temperature,
1:16 "la" for latitude "lo" for longitude, and "q" for quality, and those are the four measurements in our tuple,
1:23 we want to assign those and instead of doing like we did above where you index each item out and assign them individually,
1:28 we can do this all in one shot, so here we can say variable, four variables separated by commas equals the tuple,
1:35 and that reverses the assignment so you can see "t" has the right value of 22, latitude 44, longitude 19 and the quality is strong.


Talk Python's Mastodon Michael Kennedy's Mastodon