Python Errors

Plain-language explanations and fixes for the errors Python beginners hit most. Each page shows what triggers the error, why, and how to fix it. Find your error by type below.

80 pages

TypeError 16

TypeError vs ValueError in Python Explained Master typeerror vs valueerror in python explained in our comprehensive Python beginner guide. TypeError: 'bool' object is not iterable (Fix) Master typeerror bool object is not iterable fix in our comprehensive Python beginner guide. TypeError: 'dict' object is not callable (Fix) Master typeerror dict object is not callable fix in our comprehensive Python beginner guide. TypeError: 'float' object cannot be interpreted as an integer (Fix) Master typeerror float object cannot be interpreted as an integer fix in our comprehensive Python beginner guide. TypeError: 'function' object is not iterable (Fix) Master typeerror function object is not iterable fix in our comprehensive Python beginner guide. TypeError: 'int' object is not iterable (Fix) Master typeerror int object is not iterable fix in our comprehensive Python beginner guide. TypeError: 'list' object is not callable (Fix) Master typeerror list object is not callable fix in our comprehensive Python beginner guide. TypeError: 'module' object is not callable (Fix) Master typeerror module object is not callable fix in our comprehensive Python beginner guide. TypeError: 'NoneType' object is not iterable (Fix) Master typeerror nonetype object is not iterable fix in our comprehensive Python beginner guide. TypeError: 'str' object cannot be interpreted as an integer (Fix) Master typeerror str object cannot be interpreted as an integer fix in our comprehensive Python beginner guide. TypeError: can only concatenate str (not "int") to str (Fix) Master typeerror can only concatenate str not int to str fix in our comprehensive Python beginner guide. TypeError: cannot unpack non-iterable object (Fix) Master typeerror cannot unpack non iterable object fix in our comprehensive Python beginner guide. TypeError: list indices must be integers or slices (Fix) Master typeerror list indices must be integers or slices fix in our comprehensive Python beginner guide. TypeError: missing required positional argument (Fix) Master typeerror missing required positional argument fix in our comprehensive Python beginner guide. TypeError: sequence item 0 expected str instance (Fix) Master typeerror sequence item 0 expected str instance fix in our comprehensive Python beginner guide. TypeError: unexpected keyword argument (Fix) Master typeerror unexpected keyword argument fix in our comprehensive Python beginner guide.

ValueError 9

ValueError in Python: Causes and Fixes Master valueerror in python causes and fixes in our comprehensive Python beginner guide. ValueError when parsing input in Python (Fix) Master valueerror when parsing input in python fix in our comprehensive Python beginner guide. ValueError: could not convert string to float (Fix) Master valueerror could not convert string to float fix in our comprehensive Python beginner guide. ValueError: empty separator (Fix) Master valueerror empty separator fix in our comprehensive Python beginner guide. ValueError: invalid literal for int() with base 10 (Fix) Master valueerror invalid literal for int with base 10 fix in our comprehensive Python beginner guide. ValueError: math domain error (Fix) Master valueerror math domain error fix in our comprehensive Python beginner guide. ValueError: not enough values to unpack (Fix) Master valueerror not enough values to unpack fix in our comprehensive Python beginner guide. ValueError: substring not found (Fix) Master valueerror substring not found fix in our comprehensive Python beginner guide. ValueError: too many values to unpack (Fix) Master valueerror too many values to unpack fix in our comprehensive Python beginner guide.

AttributeError 7

AttributeError in Python: Causes and Fixes Master attributeerror in python causes and fixes in our comprehensive Python beginner guide. AttributeError: 'int' object has no attribute (Fix) Master attributeerror int object has no attribute fix in our comprehensive Python beginner guide. AttributeError: 'list' object has no attribute (Fix) Master attributeerror list object has no attribute fix in our comprehensive Python beginner guide. AttributeError: 'NoneType' object has no attribute (Fix) Master attributeerror nonetype object has no attribute fix in our comprehensive Python beginner guide. AttributeError: 'str' object has no attribute (Fix) Master attributeerror str object has no attribute fix in our comprehensive Python beginner guide. AttributeError: module has no attribute (Fix) Master attributeerror module has no attribute fix in our comprehensive Python beginner guide. AttributeError: object has no attribute (Fix) Master attributeerror object has no attribute fix in our comprehensive Python beginner guide.

Name & scope errors 5

NameError in Python: Causes and Fixes Master nameerror in python causes and fixes in our comprehensive Python beginner guide. NameError: global name not defined (Fix) Master nameerror global name not defined fix in our comprehensive Python beginner guide. NameError: name is not defined (Fix) Master nameerror name is not defined fix in our comprehensive Python beginner guide. UnboundLocalError vs NameError Explained Master unboundlocalerror vs nameerror explained in our comprehensive Python beginner guide. UnboundLocalError: local variable referenced before assignment (Fix) Master unboundlocalerror local variable referenced before assignment fix in our comprehensive Python beginner guide.

Import & module errors 4

ImportError in Python: Causes and Fixes Master importerror in python causes and fixes in our comprehensive Python beginner guide. ImportError: cannot import name (Fix) Master importerror cannot import name fix in our comprehensive Python beginner guide. ImportError: No module named X (Fix) Master importerror no module named x fix in our comprehensive Python beginner guide. ModuleNotFoundError: No module named X (Fix) Master modulenotfounderror no module named x fix in our comprehensive Python beginner guide.

Syntax & indentation 10

IndentationError in Python: Causes and Fixes Master indentationerror in python causes and fixes in our comprehensive Python beginner guide. IndentationError: expected an indented block (Fix) Master indentationerror expected an indented block fix in our comprehensive Python beginner guide. IndentationError: unexpected indent (Fix) Master indentationerror unexpected indent fix in our comprehensive Python beginner guide. IndentationError: unindent does not match any outer indentation level (Fix) Master indentationerror unindent does not match any outer indentation level fix in our comprehensive Python beginner guide. SyntaxError: EOL while scanning string literal (Fix) Master syntaxerror eol while scanning string literal fix in our comprehensive Python beginner guide. SyntaxError: indentation error (Fix) Master syntaxerror indentation error fix in our comprehensive Python beginner guide. SyntaxError: invalid character in identifier (Fix) Master syntaxerror invalid character in identifier fix in our comprehensive Python beginner guide. SyntaxError: invalid syntax (Fix) Master syntaxerror invalid syntax fix in our comprehensive Python beginner guide. SyntaxError: missing colon (Fix) Master syntaxerror missing colon fix in our comprehensive Python beginner guide. SyntaxError: unexpected EOF while parsing (Fix) Master syntaxerror unexpected eof while parsing fix in our comprehensive Python beginner guide.

Index & key errors 8

IndexError in Python: Causes and Fixes Master indexerror in python causes and fixes in our comprehensive Python beginner guide. IndexError: list index out of range (Fix Explained) Master indexerror list index out of range fix explained in our comprehensive Python beginner guide. IndexError: tuple index out of range (Fix) Master indexerror tuple index out of range fix in our comprehensive Python beginner guide. KeyError in Python: Causes and Fixes Master keyerror in python causes and fixes in our comprehensive Python beginner guide. KeyError vs IndexError in Python Explained Master keyerror vs indexerror in python explained in our comprehensive Python beginner guide. KeyError when accessing dictionary values (Fix) Master keyerror when accessing dictionary values fix in our comprehensive Python beginner guide. KeyError: key not found in dictionary (Fix) Master keyerror key not found in dictionary fix in our comprehensive Python beginner guide. KeyError: popitem(): dictionary is empty (Fix) Master keyerror popitem dictionary is empty fix in our comprehensive Python beginner guide.

File & system errors 8

FileNotFoundError in Python: Causes and Fixes Master filenotfounderror in python causes and fixes in our comprehensive Python beginner guide. FileNotFoundError vs PermissionError Explained Master filenotfounderror vs permissionerror explained in our comprehensive Python beginner guide. FileNotFoundError: [Errno 2] No such file or directory (Fix) Master filenotfounderror errno 2 no such file or directory fix in our comprehensive Python beginner guide. IsADirectoryError: [Errno 21] Is a directory (Fix) Master isadirectoryerror errno 21 is a directory fix in our comprehensive Python beginner guide. NotADirectoryError: [Errno 20] Not a directory (Fix) Master notadirectoryerror errno 20 not a directory fix in our comprehensive Python beginner guide. OSError in Python: Causes and Fixes Master oserror in python causes and fixes in our comprehensive Python beginner guide. PermissionError in Python: Causes and Fixes Master permissionerror in python causes and fixes in our comprehensive Python beginner guide. PermissionError: [Errno 13] Permission denied (Fix) Master permissionerror errno 13 permission denied fix in our comprehensive Python beginner guide.

Other runtime errors 13

AssertionError in Python: Causes and Fixes Master assertionerror in python causes and fixes in our comprehensive Python beginner guide. Common Python Errors Explained (Beginner Guide) Master common python errors explained beginner guide in our comprehensive Python beginner guide. KeyboardInterrupt Exception in Python Explained Master keyboardinterrupt exception in python explained in our comprehensive Python beginner guide. MemoryError in Python: Causes and Fixes Master memoryerror in python causes and fixes in our comprehensive Python beginner guide. OverflowError: numerical result out of range (Fix) Master overflowerror numerical result out of range fix in our comprehensive Python beginner guide. RecursionError in Python: Causes and Fixes Master recursionerror in python causes and fixes in our comprehensive Python beginner guide. RecursionError: maximum recursion depth exceeded (Fix) Master recursionerror maximum recursion depth exceeded fix in our comprehensive Python beginner guide. RuntimeError in Python: Causes and Fixes Master runtimeerror in python causes and fixes in our comprehensive Python beginner guide. StopIteration Exception in Python Explained Master stopiteration exception in python explained in our comprehensive Python beginner guide. UnicodeDecodeError: 'utf-8' codec can't decode byte (Fix) Master unicodedecodeerror utf 8 codec cant decode byte fix in our comprehensive Python beginner guide. UnicodeEncodeError in Python: Causes and Fixes Master unicodeencodeerror in python causes and fixes in our comprehensive Python beginner guide. ZeroDivisionError in Python: Causes and Fixes Master zerodivisionerror in python causes and fixes in our comprehensive Python beginner guide. ZeroDivisionError: division by zero (Fix) Master zerodivisionerror division by zero fix in our comprehensive Python beginner guide.