1.{}...()
2.{n}...(within n elements)
3. {key} ... (key = v) (** {key: v})
4.{n[n]}...([])
5.{:s or d or f}...() or (*[])
6. {key:s or d or f}...(key=v) or (**{key:v})
1.{}...()
2.{n}...(within n elements)
3. {key} ... (key = v) (** {key: v})
4.{n[n]}...([])
5.{:s or d or f}...() or (*[])
6. {key:s or d or f}...(key=v) or (**{key:v})