small changes

vladdg-dev · vladdg-dev · commit 1755cab01677 · 2021-08-25T11:10:29.000-04:00
diff --git a/course_contents/1_intro/notes/01. Data Types.md b/course_contents/1_intro/notes/01. Data Types.md
@@ -110,25 +110,13 @@ Data types representing True bool:
 
 `shopping_list[2]  # cherries`
 
-- Elements in a list can be accessed in a range:
-
-`shopping_list[0:2]  # ['cereals', 'milk']`
-
-- If the list is too big to count the elements, the last one can be accessed with a shortcut:
-`shopping_list[-1]  # cherries`
-
-
-- A list can be reversed:
-
-`shopping_list[::-1]  # ['cherries', 'milk', 'cereals']`
-
 
 
 ### Tuples
 - A tuple is very much like a list, however:
-  - A tuple is an ordered sequential data type which is **unchangeable**
+  - A tuple is an ordered sequential data type which is **immutable**
 - A tuple is created by a sequence of elements separated by a comma
-- For better readability, it is surrounded by parenthesis
+- For better readability, it can be surrounded by parenthesis
 
 Example:
 
@@ -141,9 +129,9 @@ Example:
 `better_readability = ('with', 'parenthesis')`
 
 ### Sets
-- A set is an **unordered** sequential data type
-- A set's element cannot be accessed by its index
-- A set is created by a pair of curly brackets:
+- A set is an **unordered** data type
+- Elements of a set cannot be accessed by their indices
+- A set is created by a single pair of curly brackets:
 
 `shopping_list = {'apples', 'milk', 'cherries'}`
 
@@ -155,11 +143,7 @@ curly braces, keys and values
 
 Example:
 ```
-employees = {
-    'ID': 16915,
-    'name': 'James',
-    'department': ['Sales', 'Accounting']
-}
+employees = {'ID': 16915, 'name': 'James', 'department': ['Sales', 'Accounting']}
 ```
 
 - A dictionary is accessed by keys as such:
