second version -set

06_Day_Tuples/06_tuples.md

@@ -29,6 +29,8 @@
     - [Joining Tuples](#joining-tuples)
     - [Deleting Tuples](#deleting-tuples)
   - [💻 Exercises: Day 6](#-exercises-day-6)
+    - [Exercises: Level 1](#exercises-level-1)
+    - [Exercises: Level 2](#exercises-level-2)
 
 # Day 6:
 
@@ -223,18 +225,23 @@ del fruits
 
 ## 💻 Exercises: Day 6
 
+### Exercises: Level 1
+
 1. Create an empty tuple
 2. Create a tuple containing names of your sisters and your brothers (imaginary siblings are fine)
 3. Join brothers and sisters tuples and assign it to siblings
 4. How many siblings do you have?
 5. Modify the siblings tuple and add the name of your father and mother and assign it to family_members
-6. Unpack siblings and parents from family_members
-7. Create fruits, vegetables and animal products tuples. Join the three tuples and assign it to a variable called food_stuff_tp.
-8. Change the about food_stuff_tp  tuple to a food_stuff_lt list
-9. Slice out the middle item or items from the food_stuff_tp tuple or food_stuff_lt list.
-10. Slice out the first three items and the last three items from food_staff_lt list
-11. Delete the food_staff_tp tuple completely
-12. Check if an item exists in  tuple:
+
+### Exercises: Level 2
+
+1. Unpack siblings and parents from family_members
+1. Create fruits, vegetables and animal products tuples. Join the three tuples and assign it to a variable called food_stuff_tp.
+1. Change the about food_stuff_tp  tuple to a food_stuff_lt list
+1. Slice out the middle item or items from the food_stuff_tp tuple or food_stuff_lt list.
+1. Slice out the first three items and the last three items from food_staff_lt list
+1. Delete the food_staff_tp tuple completely
+1. Check if an item exists in  tuple:
 
 - Check if 'Estonia' is a nordic country
 - Check if 'Iceland' is a nordic country
@@ -243,4 +250,5 @@ del fruits
   nordic_countries = ('Denmark', 'Finland','Iceland', 'Norway', 'Sweden')
   ```
 
+
 [<< Day 5](../05_Day_Lists/05_lists.md) | [Day 7 >>](../07_Day_Sets/07_sets.md)

07_Day_Sets/07_sets.md

@@ -9,10 +9,9 @@
 
 <sub>Author:
 <a href="https://www.linkedin.com/in/asabeneh/" target="_blank">Asabeneh Yetayeh</a><br>
-<small> First Edition: Nov 22 - Dec 22, 2019</small>
+<small> Second Edition: July, 2021</small>
 </sub>
 
-</div>
 </div>
 
 [<< Day 6](../06_Day_Tuples/06_tuples.md) | [Day 8 >>](../08_Day_Dictionaries/08_dictionaries.md)
@@ -37,16 +36,19 @@
     - [Finding Symmetric Difference Between Two Sets](#finding-symmetric-difference-between-two-sets)
     - [Joining Sets](#joining-sets-1)
   - [💻 Exercises: Day 7](#-exercises-day-7)
+    - [Exercises: Level 1](#exercises-level-1)
+    - [Exercises: Level 2](#exercises-level-2)
+    - [Exercises: Level 3](#exercises-level-3)
 
 # 📘 Day 7
 
 ## Sets
 
-Let me take you back to your elementary or high school Mathematics lesson. The Mathematics definition of a set can be applied also in python. Set is a collection of unordered and unindexed distinct elements. In python set is used to store unique items, and it is possible to find the _union_, _intersection_, _difference_, _symmetric difference_, _subset_, _super set_ and _disjoint set_ among sets.
+Set is a collection of items. Let me take you back to your elementary or high school Mathematics lesson. The Mathematics definition of a set can be applied also in Python. Set is a collection of unordered and un-indexed distinct elements. In Python set is used to store unique items, and it is possible to find the _union_, _intersection_, _difference_, _symmetric difference_, _subset_, _super set_ and _disjoint set_ among sets.
 
 ### Creating a Set
 
-We use curly brackets, {} to create a set.
+We use curly brackets, {} to create a set or the *set()* built-in function.
 
 - Creating an empty set
 
@@ -94,7 +96,7 @@ We use loops to access items. We will see this in loop section
 
 ### Checking an Item
 
-To check if an item exist in a list use use _in_.
+To check if an item exist in a list we use _in_ membership operator.
 
 ```py
 # syntax
@@ -106,12 +108,12 @@ print("Does set st contain item3? ", 'item3' in st) # Does set st contain item3?
 
 ```py
 fruits = {'banana', 'orange', 'mango', 'lemon'}
-'mango' in fruits
+print('mango' in fruits ) # True
 ```
 
 ### Adding Items to a Set
 
-Once a set is created we cannot change any items but we can add additional ones.
+Once a set is created we cannot change any items and we can also add additional items.
 
 - Add one item using _add()_
 
@@ -129,6 +131,7 @@ fruits.add('lime')
 ```
 
 - Add multiple items using _update()_
+  The *update()* allows to add multiple items to a set. The *update()* takes a list argument.
 
 ```py
 # syntax
@@ -186,7 +189,7 @@ If we want to delete the set itself we use _del_ operator.
 ```py
 # syntax
 st = {'item1', 'item2', 'item3', 'item4'}
-del set
+del st
 ```
 
 **Example:**
@@ -198,7 +201,7 @@ del fruits
 
 ### Converting List to Set
 
-We can convert list to set and set to list back. Converting list to set removes duplicates and only unique items will be reserved.
+We can convert list to set and set to list. Converting list to set removes duplicates and only unique items will be reserved.
 
 ```py
 # syntax
@@ -338,7 +341,7 @@ It returns the the symmetric difference between two sets. It means that it retur
 # syntax
 st1 = {'item1', 'item2', 'item3', 'item4'}
 st2 = {'item2', 'item3'}
-# it means (A\B)∪(B)
+# it means (A\B)∪(B\A)
 st2.symmetric_difference(st1) # {'item1', 'item4'}
 ```
 
@@ -377,7 +380,7 @@ dragon = {'d', 'r', 'a', 'g', 'o','n'}
 python.isdisjoint(dragon)  # False, there are common items {'o', 'n'}
 ```
 
-🌕 You are a rising star . You have just completed day 7 challenges and you are 7 steps ahead in to your way to greatness. Now do some exercises for your brain and for your muscle.
+🌕 You are a rising star . You have just completed day 7 challenges and you are 7 steps ahead in to your way to greatness. Now do some exercises for your brain and muscles.
 
 ## 💻 Exercises: Day 7
 
@@ -389,21 +392,30 @@ B = {19, 22, 20, 25, 26, 24, 28, 27}
 age = [22, 19, 24, 25, 26, 24, 25, 24]
 ```
 
+### Exercises: Level 1
+
 1. Find the length of the set it_companies
 2. Add 'Twitter' to it_companies
 3. Insert multiple IT companies at once to the set it_companies
 4. Remove one of the companies from the set it_companies
 5. What is the difference between remove and discard
-6. Join A and B
-7. Find A intersection B
-8. Is A subset of B
-9. Are A and B disjoint sets
-10. Join A with B and B with A
-11. What is the symmetric difference between A and B
-12. Delete the sets completely
-13. Convert the ages to a set and compare the length of the list and the set, which one is bigger?
-14. Explain the difference between the following data types: string, list, tuple and set
-15. _I am a teacher and I love to inspire and teach people._ How many unique words have been used in the sentence? You did not learn loops yet you can do it manually.
+
+### Exercises: Level 2
+
+1. Join A and B
+1. Find A intersection B
+1. Is A subset of B
+1. Are A and B disjoint sets
+1. Join A with B and B with A
+1. What is the symmetric difference between A and B
+1. Delete the sets completely
+
+### Exercises: Level 3
+
+1. Convert the ages to a set and compare the length of the list and the set, which one is bigger?
+1. Explain the difference between the following data types: string, list, tuple and set
+2. _I am a teacher and I love to inspire and teach people._ How many unique words have been used in the sentence? Use the split methods and set to get the unique words.
+
 
 🎉 CONGRATULATIONS ! 🎉