local variable 'name' referenced before assignment

This error occurs when you try to access the value of a local variable before it has been assigned a value. In Python, a variable must be assigned a value before it can be used.

Here's an example:

def greet():
    print("Hello, " + name)

greet()

In this code, `name` is a local variable that has not been assigned a value. When the `greet()` function is called, it tries to print the value of `name`, but since it has not been assigned a value, Python raises the "local variable 'name' referenced before assignment" error.

To fix this error, you need to assign a value to the variable before you try to use it:

def greet():
    name = "Alice"
    print("Hello, " + name)

greet()

In this code, `name` is assigned the value "Alice" before it is used in the `print()` statement. This code will run without errors.