lookup

Looks up a value in a dictionary Variant.

This function is a wrapper around lookup_value and @get. In the case that null would have been returned, this function returns false. Otherwise, it unpacks the returned value and returns true.

format_string determines the C types that are used for unpacking the values and also determines if the values are copied or borrowed, see the section on GVariant format strings.

This function is currently implemented with a linear scan. If you plan to do many lookups then VariantDict may be more efficient.

Parameters:

this	a dictionary Variant
key	the key to lookup in the dictionary
format_string	a GVariant format string
...	the arguments to unpack the value into

Returns:

true if a value was unpacked