Create checklist.md

checklist.md

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+# Сheck Your Code Against the Following Points
+
+## Don't Repeat Yourself
+
+Make sure you don't have duplicated lines or whole blocks of code. Use your `format_linter_error` function to avoid this.
+
+Also, use the `format_single_linter_file` function to format a single file.
+
+## Code Style
+
+Use descriptive and correct variable names.
+
+Good example:
+
+```python
+my_dict = {"one": "a", "two": "b"}
+[(number + " " + letter) for (number, letter) in my_dict.items()]
+```
+
+Bad example:
+
+```python
+my_dict = {"one": "a", "two": "b"}
+[(k + "  " + v) for (k, v) in my_dict.items()]
+```
+
+While creating a dictionary — write key-value pairs in a single row. The curly braces must be located in one of two options: open and start with the text or have a line break between the text. 
+
+Good example:
+
+```python
+my_dict = {
+"greeting": "Good morning, have a nice day!", 
+	"answer": "Good morning, thanks!"
+}
+
+```
+
+Also a good example:
+
+```python
+my_dict = {"greeting": "Good morning, have a nice day!", 
+	      "answer": "Good morning, thanks!"}
+```
+
+Bad example:
+
+```python
+my_dict = {"greeting": "Good morning, have a nice day!", 
+	      "answer": "Good morning, thanks!"
+}
+```
+