Merge pull request #1490 from viktoria-rybenchuk/update-readme

update README.md and checklist.md

README.md

@@ -9,14 +9,18 @@ a **person**, it has keys: `name`, `age`,
 female. All `names` are different. Key 
 `wife`/`husband` can be either `None` or 
 name of another person.
+1. **Define a Class `Person`**  
+
+2. **The `__init__` method should take two parameters**
+     - `name`: A string representing the name of the person.
+     - `age`: An integer representing the age of the person.
 
-Create class `Person`. It's `__init__` method takes
-and store `name`, `age` of a person.
-This class also should have a class attribute
-`people`, it is a dict that stores `Person` 
-instances by their `name`. The `__init__` method should 
-add elements to this attribute.
 
+3. **Define a **class attribute** `people` in the `Person` class to store instances by their `name`.**
+     - The keys are the `name` values of instances.
+     - The values are references to the `Person` instances themselves.
+     - Within the `__init__` method, add each new `Person` instance to the `people` dictionary.
+
 Write function `create_person_list`, this function
 takes list `people` and return list with
 `Person` instances instead of dicts.

checklist.md

@@ -18,8 +18,20 @@ def get_full_name(x: str, y: str) -> str:
 ```
 
 2. Avoid nested `if` by using `and`, `or` logical operators.
+3. When creating a list of instances from a collection (such as a list of dictionaries), it is  recommended to use **list comprehension** rather than traditional `for` loops. 
+4. When accessing values in a dictionary, it is better to use the `dict.get()` method instead of explicitly checking for the presence of a key. This approach simplifies the code and avoids potential `KeyError` exceptions, making it cleaner and more concise.
 
-## Clean Code
+ Cood example:
+
+```python
+if person.get('wife'):
+    pass
+```
 
-Add comments, prints, and functions to check your solution when you write your code. 
-Don't forget to delete them when you are ready to commit and push your code.
+ Bad example:
+```python
+if "wife" in person and person["wife"]:
+    pass
+```
+## Clean Code
+There is no need to add comments to the code as it is clear and self-explanatory.