Identify misplaced colon

[carlkma]

return the exact position(s) of misplaced colons (if any) and suggest a valid colon position

[carlkma]

General Idea

Colons that do not align with the following usages are considered misplaced:

Colons serve three (3) primary purposes in Python:

1. a slice operator, e.g., sub_string = a_string[3:9]
2. a signal for the start of indented blocks, e.g., after for i in range(10):
3. a designation for key:value pairs in a dictionary, e.g., a_dict = {"a_key": "a_value"}

Thus, we can conduct simple regex checks to verify if

• a colon is placed in between brackets, be it [] (for strings and lists) or {} (for dictionaries)
• a colon is placed at the end of a if, else, while, or for statement