Error in Python code: SyntaxError: invalid syntax

Problem

A Python script fails to execute and raises the following exception:

SyntaxError: invalid syntax

The error occurs on a line containing an assignment statement or expression that uses what appears to be an equal sign (=).

Cause

The most likely cause is that the character used as the assignment operator is not the standard ASCII equals sign (=) recognized by Python.

This can happen when:

• Code is copied from formatted documents, web pages, or messaging applications.
• A Unicode character that visually resembles = is inserted accidentally.
• Text is entered using an incorrect keyboard layout or input method.
• An editor automatically replaces standard characters with typographic alternatives.

Although the character may look identical to =, Python interprets it as a different symbol and reports a syntax error.

Resolution

Re-enter the problematic line of code manually to ensure no hidden or non-standard characters are present. Verify the keyboard layout is set correctly to prevent the substitution of invalid or unexpected characters.