Add changes to Data structures lesson

Author: kochaika

Diff for: Data structures/Dictionaries/task.md

@@ -25,6 +25,8 @@ You can access a value in a dictionary similarly to how you would access a value
 but using a key instead of an index. More info about this data structure can be found 
 <a href="https://docs.python.org/3/tutorial/datastructures.html#dictionaries">here</a>.
 
+For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6481).
+
 Add Jared's (`"Jared"`) number `570` to the phone book.
 Remove Gerard's number from the phone book.
 Print Jane's phone number from the `phone_book`.  

Diff for: Data structures/Dictionary keys() and values()/task.md

@@ -14,6 +14,8 @@ followed by a dot.
 
 Read more about the operations that dictionaries support <a href="https://docs.python.org/3/library/stdtypes.html#typesmapping">here</a>.
 
+For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/11096).
+
 Print all values from the `phone_book` .  
 
 <div class='hint'>Use the method <code>values()</code>.</div>

Diff for: Data structures/Dictionary keys/task.md

@@ -2,6 +2,6 @@
 
 Try to figure out what's wrong with this dictionary and fix it.
 
-<div class="hint">Remember that dictionary keys can only be immutable types? You could replace the list with several individual key:value pairs with 
-keys of type <code>str</code> or with a tuple.</div>
-<div class="hint">Remember that keys need to be unique? You could rename one of the 'Bob' keys.</div>
+When fixing, be aware of the following requirements
+- Since the dictionary keys can be only immutable types, replace the list with several individual `key:value` pairs with keys of type `str` or with a tuple.
+- Since the keys need to be unique, rename one of the 'Bob' keys to any name you want.

Diff for: Data structures/In keyword/task.md

@@ -8,6 +8,8 @@ item. You can apply `in` to lists or dictionaries the same way you did it with s
 
 Please complete the task in the specified order.
 
+For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/11096).
+
 <div class="hint">Use the <code>in</code> keyword.</div>
 
 <div class="hint">Use the <code>.values()</code> and <code>.keys()</code> attributes.</div>

Diff for: Data structures/Join method/task.md

@@ -33,6 +33,8 @@ aa = bb = cc
 Python is a programming language
 ```
 
+For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6972#join-a-list).
+
 Assign a value to the  `joined` variable such that the `print` statement prints the following:
 ```text
 I like apples and I like bananas and I like peaches and I like grapes

Diff for: Data structures/List items/task.md

@@ -8,5 +8,8 @@ animals[:] = []
 ```
 
 Make all `animals` elephants by replacing the last two items.  
+We suggest that you first run the program in the IDE without changes to see how the `animals` list looks like after all the operations have been made
 
 <div class='hint'>Use assignment to a slice as in examples.</div>
+
+<div class='hint'>You can assign a list consisting of several elements.</div>

Diff for: Data structures/Lists introduction/task.md

@@ -17,6 +17,8 @@ squares + [36, 49, 64, 81, 100]
 
 You can explore lists in more detail by reading <a href="https://docs.python.org/3.9/tutorial/introduction.html#lists">this page</a>.
 
+For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/5979).
+
 Use list slicing to print `[4, 9, 16]`.  
 
 <div class='hint'>List slicing syntax looks just like that for strings: <code>lst[index1:index2]</code>.

Diff for: Data structures/Lists operations/task.md

@@ -32,5 +32,7 @@ squares
 
 Find out about many other useful list methods on <a href="https://docs.python.org/3/tutorial/datastructures.html#more-on-lists">this page</a>.
 
+For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6031).
+
 Replace `"dino"` with `"dinosaur"` in the `animals` list.  
 <div class='hint'>Use list indexing operation and value assignment.</div>

Diff for: Data structures/Nested Lists/task.md

@@ -31,6 +31,8 @@ Output:
 ```text
 1
 ```
+For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6938).
+
 In the code editor, use indexing to access and print elements `9` and `10` from of the nested list `my_list`. 
 
 <div class="hint">If you're stuck, review the examples in the task description again.</div>

Diff for: Data structures/Tuples/task.md

@@ -40,6 +40,8 @@ values `12345`, `54321`, and `hello!` are packed together in a tuple.
 
 Some other list methods are also 
 applicable to tuples. You can read more about tuples <a href="https://docs.python.org/3/tutorial/datastructures.html#tuples-and-sequences">here</a>.
+
+For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/7462).
 
 Print the length of the tuple `alphabet`. Then create a tuple with a single element `'fun_tuple'`. 
 You can run the code to see what it prints.