Fix IndexError: Index out of range error in Python lists and sequences

Sat, 05 Oct 2024 00:00:00 +0000

1. Symptoms

The IndexError: index X is out of bounds for axis Y with size Z (or simply IndexError: list index out of range) occurs when attempting to access an element in a sequence (list, tuple, string, or array) using an index outside its valid range. Valid indices for a sequence of length n are from 0 to n-1 (positive) or -1 to -n (negative).

Common manifestations:

IndexError: list index out of range – Most frequent, on lists.
IndexError: tuple index out of range – On immutable tuples.
IndexError: string index out of range – On strings.
IndexError: index 5 is out of bounds for axis 0 with size 3 – NumPy arrays, specifying axis.

Stack traces point to the exact line:

Fix TypeError: Resolve type mismatches in Python code and functions

Wed, 18 Sep 2024 00:00:00 +0000

1. Symptoms

TypeError in Python occurs when an operation or function receives an argument of an incompatible type. The error message typically follows the format: TypeError: <operation>(): argument types did not match C types or TypeError: unsupported operand type(s) for <operator>: '<type1>' and '<type2>'.

Common symptoms include:

Arithmetic operations on non-numeric types:

>>> 5 + "hello"
TypeError: unsupported operand type(s) for +: 'int' and 'str'

Function calls with wrong argument types:

Debugging on ErrorVault — Developer Error Code Dictionary

Fix IndexError: Index out of range error in Python lists and sequences

1. Symptoms

Fix TypeError: Resolve type mismatches in Python code and functions

1. Symptoms