What are the shortcut-keys or key for rectifying syntax errors?

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While writing a program, if we write self.names = Names() before creating the Names class, what is the shortcut key for creating the Names class I've gone through the tutorial but did not find the shortcut-keys for error correction of the code. In the Wing's editor, when self.names = Names() is written before the Names class is created and the mouse hovers over it, a message says 'Undefined name: Names'.