This is a small collection of Python errors I've encountered while learning.
I'm saving minimal examples and fixes as I go.

Each folder contains:

• reproduce.py
• fix.py
• README explanation

• Why does Python say "No such file or directory"? (wrong path or working directory)
• Why do I get "AttributeError: 'dict' object has no attribute 'append'"?
• Why can't Python find my module? (ModuleNotFoundError, example case)
• Why does Python say "list index out of range"? (IndexError)
• Why do I get "TypeError" when working with data? (common case)
• Why does json.loads() fail to parse my data? (JSONDecodeError)
• Why does Python say "No module named 'my_utils'" even though the file exists? (local module case)
• Why do I get "TypeError: '>' not supported between instances of 'str' and 'int'?
• Why does Python fail when I just press enter on input()?
• Why does Python say "cannot import name" even though the module exists?
• Why can't Python find my file even though it's in the same folder? (working directory issue) (relative path issue)

• NameError: name '...' is not defined

• UnboundLocalError: local variable referenced before assignment

• TypeError: 'NoneType' object is not subscriptable
• TypeError: list indices must be integers or slices, not str
• TypeError: 'int' object is not callable
• TypeError: can only concatenate str (not "int") to str
• TypeError: string indices must be integers
• TypeError: object of type 'int' has no len()
• TypeError: unhashable type: 'list'
• TypeError: 'int' object is not subscriptable
• TypeError: greet() missing 1 required positional argument
• TypeError: unsupported operand type(s) for +: 'int' and 'list'
• TypeError: write() argument must be str, not dict
• TypeError: '>' not supported between instances of 'str' and 'int'

• IndexError: list index out of range
• IndexError: tuple index out of range
• IndexError: list assignment index out of range
• IndexError: string index out of range

• AttributeError: 'list' object has no attribute 'add'
• AttributeError: 'NoneType' object has no attribute 'append'
• AttributeError: 'NoneType' object has no attribute 'split'
• AttributeError: 'tuple' object has no attribute 'append'
• AttributeError: 'str' object has no attribute 'append'
• AttributeError: 'dict' object has no attribute 'append'

• ImportError: cannot import name '...' from '...'
• ImportError: cannot import name 'squareroot' from 'math' (typo)

• ModuleNotFoundError: No module named 'requests' (package not installed)
• ModuleNotFoundError: No module named 'numpy'
• ModuleNotFoundError: No module named 'yaml'
• ModuleNotFoundError: No module named 'pandas'
• ModuleNotFoundError: No module named 'my_utils'

• FileNotFoundError: No such file or directory (wrong path or working directory)
• PermissionError: [Errno 13] Permission denied
• PermissionError: [Errno 13] Permission denied: directory
• NotADirectoryError: Not a directory
• IsADirectoryError: expected file but got directory
• FileNotFoundError: wrong relative path (same folder issue)

• FileExistsError: [Errno 17] File exists

• JSONDecodeError: Expecting value (empty or invalid JSON)
• JSONDecodeError: Expecting property name enclosed in double quotes
• JSONDecodeError: Extra data
• TypeError: the JSON object must be str, bytes or bytearray

• UnicodeDecodeError: 'utf-8' codec can't decode byte

• UnicodeDecodeError: 'utf-8' codec can't decode byte (read_csv)
• ParserError: Error tokenizing data
• KeyError: column not found
• ValueError: Length mismatch
• IndexError: single positional indexer is out-of-bounds

• SyntaxError: invalid syntax

• IndentationError: unexpected indent

• KeyError Guide
• KeyError: 'age' (Python Dictionary)
• KeyError: 'age' (JSON Data)

• ValueError: invalid literal for int() (non-numeric string)
• ValueError: too many values to unpack
• ValueError: not enough values to unpack
• ValueError: could not convert string to float (non-numeric string)
• ValueError: invalid literal for float() (non-numeric or malformed string)
• ValueError: invalid literal for int() (empty input)

• RecursionError: maximum recursion depth exceeded

• ZeroDivisionError: division by zero

More error cases will be added as I encounter them while learning Python.

• Contact Log: TypeError, AttributeError
• File Log Reader: FileNotFoundError, PermissionError
• User Data Processor: ModuleNotFoundError, IndexError, TypeError
• JSON Config Loader: JSONDecodeError, KeyError, TypeError, ValueError