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<H2><A NAME="SECTION007250000000000000000"></A>
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5.2.5 Dictionary displays
</H2>
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<P>
A dictionary display is a possibly empty series of key/datum pairs
enclosed in curly braces:
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<P>
<dl><dd><pre class=verbatim>
dict_display:   "{" [key_datum_list] "}"
key_datum_list: key_datum ("," key_datum)* [","]
key_datum:      expression ":" expression
</pre></dl>

<P>
A dictionary display yields a new dictionary object.
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<P>
The key/datum pairs are evaluated from left to right to define the
entries of the dictionary: each key object is used as a key into the
dictionary to store the corresponding datum.

<P>
Restrictions on the types of the key values are listed earlier in
section <A HREF="types.html#types">3.2</A>.  (To summarize,the key type should be hashable,
which excludes all mutable objects.)  Clashes between duplicate keys
are not detected; the last datum (textually rightmost in the display)
stored for a given key value prevails.
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