Here's the grammar file: https://docs.python.org/2/reference/grammar.html https://docs.python.org/2/reference/grammar.html Look for dictorsetmaker (for {}) tes

Here's the grammar file: https://docs.python.org/2/reference/grammar.html https://docs.python.org/2/reference/grammar.html Look for dictorsetmaker (for {}) testlist_comp (for generator expressions) and listmaker (for [], i.e. list comprehensions).