How To Fix Python Errors

This repo contains a README with an explanation as to why the error is happening and how to fix it.

Contents

• How To Fix Python Errors
  • Contents
    • NameError
    • IndexError
    • IndentationError
    • ModuleNotFoundError
    • KeyError
    • ZeroDivisionError
    • AttributeError
    • UnboundLocalError
    • RecursionError
    • ImportError
    • TypeError
    • ValueError
    • StopIteration
    • KeyboardInterrupt

NameError

• This error is usually occuring because you haven't defined the variable and are just using it.

• To fix it you should define it like VariableName = AnythingHere.

  • Note. You mustn't define VariableName as another non existant variable. This will get you back to step one.

• Examples can be found in /Examples

• Official Documentation of NameError

IndexError

• This error is usually raised when attempting to retrieve an index from a sequence and the index isn't found in the sequence.

• To fix make sure the index is a number inside the sequence

  • Note. in python counts from 0 therefore one will be 0, two will be 1, three will be 2 and so on.

• Examples can be found in /Examples

• Official Documentation of IndexError

IndentationError

• This error occurs when the code expects an indent or you indented a line too much than expected.

• To fix it, get everything under a : in the same indent

  • Note: lines below a : need to be indented. If there is no : in the line above then it should be in the same indentation level as the line above

• Examples can be found in /Examples

• Note that using both tabs and spaces when indenting will raise TabError. stick to either spaces or tabs, not both

• Official Documentation of IndentationError

ModuleNotFoundError

• This specific error is raised when you try to import a module that is not installed / doesnt exist.

• To fix it, search in pypi.org and see if it actually exists, and install it

  • First, make sure you dont have any spelling mistakes in the import statement

• Examples can be found in /Examples

• Official Documentation of ModuleNotFoundError

KeyError

• This type of error is usually raised when trying to access a non-existent key of a dict

• To fix this,

  • make sure you have no spelling error in the key name

  • Add the key when creating the dict

  • If the above is not possible, try adding the key manually

  • If adding the key is not a choice, avoid the error by using dict.get which would return None if not found

• Examples can be found in /Examples

• Official Documentation of KeyError

ZeroDivisionError

• The error is kind of self-explanatory. You tried to divide something by 0 which is impossible.

• This usually happens when you divide something with a user input and the user inputs

• To fix this, use an if statement to check if the number is 0 and dont divide if it is.

• Examples can be found in /Examples

• Official Documentation of ZeroDivisionError

AttributeError

• AttributeError is raised when you try to access an attribute of an object that doesnt exist.

• Fixing this error needs a proper understanding of classes and attributes.

• To fix this, check for spelling errors and see if that attribute actually exists

• Examples can be found in /Examples

• Official Documentation of AttributeError

UnboundLocalError

• This is raised when you reference a variable inside a function or method but no value is bound to that variable

• To fix it, see if you are using it before assigning something to it

• Examples can be found in /Examples

• Official Documentation of UnboundLocalError

RecursionError

• Recursion error is raised when the maximum recursion depth AKA sys.getrecursionlimit exceeds

• To fix it, add a base case to return early and not do any more recursion

• Examples can be found in /Examples

• Official Documentation of RecursionError

ImportError

• Is raised when the “from list” in from ... import has a name that cannot be found.

• To fix it, check for spelling errors. Also check if the module exists by checking the relevent documentation

• Examples can be found in /Examples

• Official Documentation of ImportError

TypeError

• Raised when an operation or function is applied to an object of inappropriate type.

• To fix it, read the relevant documentation and find which type of object you should be passing in.

• Examples can be found in /Examples

• Official Documentation of TypeError

ValueError

• Raised when an operation or function receives an argument that has the right type but an inappropriate value

• To fix it, read the relevant documentation and see which kind of value is accepted.

• Examples can be found in /Examples

• Official Documentation of ValueError

StopIteration

• This exception is raised to signal that there are no further items produced by the iterator or the generator is closed

• This is not fixable. You would have to create a new generator object in order to bypass this

• Examples can be found in /Examples

• Official Documentation of StopIteration

KeyboardInterrupt

• Raised when the user pressed ctrl + c on their keyboard

• There is no way of "fixing" this but you can bypass this by using a try-except block

• Examples can be found in /Examples

• Official Documentation of KeyboardInterrupt