sys.path.append invalid character in identifier

The error message "invalid character in identifier" typically occurs when attempting to import a module with an invalid name or when using an invalid character in a module name.

In the specific case of "sys.path.append", this error may occur if an invalid character is used in a file path that is being added to the Python path. For example, if a file path includes a character such as a space or a non-ASCII character, it may result in this error.

To resolve this error, ensure that all file paths being added to the Python path are valid and do not include any invalid characters. It may also be helpful to use raw string literals when specifying file paths to avoid any issues with escape characters.