Update 5_lists_exercise.py

Basics/Exercise/5_lists/5_lists_exercise.py

@@ -1,4 +1,4 @@
-# 1. Let us say your expense for every month are listed below,
+# 1. Let us say your expenses for every month are listed below,
 # 	1. January -  2200
 #  	2. February - 2350
 #     3. March - 2600
@@ -7,36 +7,36 @@
 #
 # Create a list to store these monthly expenses and using that find out,
 #
-# 1. In Feb, how many dollars you spent extra compare to January?
-# 2. Find out your total expense in first quarter (first three months) of the year.
+# 1. In Feb, how many dollars did you spend extra compared to January?
+# 2. Find out your total expenses in the first quarter (first three months) of the year.
 # 3. Find out if you spent exactly 2000 dollars in any month
-# 4. June month just finished and your expense is 1980 dollar. Add this item to our monthly expense list
-# 5. You returned an item that you bought in a month of April and
-# got a refund of 200$. Make a correction to your monthly expense list
+# 4. June month just finished and your expense is 1980 dollars. Add this item to our monthly expense list
+# 5. You returned an item you bought in April and
+# got a refund of 200$. Correct your monthly expense list
 # based on this
 
 exp = [2200,2350,2600,2130,2190]
 
-# 1. In Feb, how many dollars you spent extra compare to January?
-print("In feb this much extra was spent compared to jan:",exp[1]-exp[0]) # 150
+# 1. In Feb, how many dollars did you spend extra compared to January?
+print("In feb this much extra was spent compared to Jan:",exp[1]-exp[0]) # 150
 
-# 2. Find out your total expense in first quarter (first three months) of the year
+# 2. Find out your total expenses in first quarter (first three months) of the year
 print("Expense for first quarter:",exp[0]+exp[1]+exp[2]) # 7150
 
 # 3. Find out if you spent exactly 2000 dollars in any month
 print("Did I spent 2000$ in any month? ", 2000 in exp) # False
 
-# 4. June month just finished and your expense is 1980 dollar. Add this item to our monthly expense list
+# 4. June month just finished and your expense is 1980 dollars. Add this item to our monthly expense list
 exp.append(1980)
 print("Expenses at the end of June:",exp) # [2200, 2350, 2600, 2130, 2190, 1980]
 
-# 5. You returned an item that you bought in a month of April and
-# got a refund of 200$. Make a correction to your monthly expense list
+# 5. You returned an item that you bought in the month of April and
+# got a refund of 200$. Correct your monthly expense list
 # based on this
 exp[3] = exp[3] - 200
 print("Expenses after 200$ return in April:",exp) # [2200, 2350, 2600, 1930, 2190, 1980]
 
-# 2. You have a list of your favourite marvel super heros
+# 2. You have a list of your favourite Marvel superheroes
 # heros=['spider man','thor','hulk','iron man','captain america']
 # Using this list
 
@@ -50,6 +50,8 @@
 # so remove it from the list first and then add it after 'hulk'
 heros.remove('black panther')
 heros.insert(3,'black panther')
+#a generalized way of looking for the index without counting the index manually would be helpful in case of longer lists. so it can also be done as follows:
+heros.insert(heros.index('hulk')+1,'black panther')
 print(heros)
 # 4. Now you don't like thor and hulk because they get angry easily :)
 #    So you want to remove thor and hulk from list and replace them with doctor strange (because he is cool).