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Dictionary which uses normalized URIs as keys.
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An as-of-yet unset attribute or unprovided default parameter.
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Load a schema from ./schemas/``name``.json and return it.
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A dumb version of `textwrap.indent` from Python 3.3.
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Construct a single string containing indexing operations for the indices.
For example, [1, 2, "foo"] -> [1][2]["foo"]
Arguments:
indices (sequence):
The indices to format.
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Return the set of additional properties for the given ``instance``.
Weeds out properties that should have been validated by ``properties`` and
/ or ``patternProperties``.
Assumes ``instance`` is dict-like already.
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Create an error message for extra items or properties.
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Create an error message for a failure to match the given types.
If the ``instance`` is an object and contains a ``name`` property, it will
be considered to be a description of that object and used as its type.
Otherwise the message is simply the reprs of the given ``types``.
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isinstance() can accept a bunch of really annoying different types:
* a single type
* a tuple of types
* an arbitrary nested tree of tuples
Return a flattened tuple of the given argument.
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Wrap ``thing`` in a list if it's a single str.
Otherwise, return it unchanged.
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Check if two things are equal, but evade booleans and ints being equal.
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A hack to make True and 1 and False and 0 unique for ``uniq``.
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Check if all of a container's elements are unique.
Successively tries first to rely that the elements are hashable, then
falls back on them being sortable, and finally falls back on brute
force.
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