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import itertools
import json
import pkgutil
import re
from jsonschema.compat import str_types, MutableMapping, urlsplit
class URIDict(MutableMapping):
"""
Dictionary which uses normalized URIs as keys.
"""
def normalize(self, uri):
return urlsplit(uri).geturl()
def __init__(self, *args, **kwargs):
self.store = dict()
self.store.update(*args, **kwargs)
def __getitem__(self, uri):
return self.store[self.normalize(uri)]
def __setitem__(self, uri, value):
self.store[self.normalize(uri)] = value
def __delitem__(self, uri):
del self.store[self.normalize(uri)]
def __iter__(self):
return iter(self.store)
def __len__(self):
return len(self.store)
def __repr__(self):
return repr(self.store)
class Unset(object):
"""
An as-of-yet unset attribute or unprovided default parameter.
"""
def __repr__(self):
return "<unset>"
def load_schema(name):
"""
Load a schema from ./schemas/``name``.json and return it.
"""
data = pkgutil.get_data('jsonschema', "schemas/{0}.json".format(name))
return json.loads(data.decode("utf-8"))
def indent(string, times=1):
"""
A dumb version of :func:`textwrap.indent` from Python 3.3.
"""
return "\n".join(" " * (4 * times) + line for line in string.splitlines())
def format_as_index(indices):
"""
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.
"""
if not indices:
return ""
return "[%s]" % "][".join(repr(index) for index in indices)
def find_additional_properties(instance, schema):
"""
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.
"""
properties = schema.get("properties", {})
patterns = "|".join(schema.get("patternProperties", {}))
for property in instance:
if property not in properties:
if patterns and re.search(patterns, property):
continue
yield property
def extras_msg(extras):
"""
Create an error message for extra items or properties.
"""
if len(extras) == 1:
verb = "was"
else:
verb = "were"
return ", ".join(repr(extra) for extra in extras), verb
def types_msg(instance, types):
"""
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``.
"""
reprs = []
for type in types:
try:
reprs.append(repr(type["name"]))
except Exception:
reprs.append(repr(type))
return "%r is not of type %s" % (instance, ", ".join(reprs))
def flatten(suitable_for_isinstance):
"""
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.
"""
types = set()
if not isinstance(suitable_for_isinstance, tuple):
suitable_for_isinstance = (suitable_for_isinstance,)
for thing in suitable_for_isinstance:
if isinstance(thing, tuple):
types.update(flatten(thing))
else:
types.add(thing)
return tuple(types)
def ensure_list(thing):
"""
Wrap ``thing`` in a list if it's a single str.
Otherwise, return it unchanged.
"""
if isinstance(thing, str_types):
return [thing]
return thing
def unbool(element, true=object(), false=object()):
"""
A hack to make True and 1 and False and 0 unique for ``uniq``.
"""
if element is True:
return true
elif element is False:
return false
return element
def uniq(container):
"""
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.
"""
try:
return len(set(unbool(i) for i in container)) == len(container)
except TypeError:
try:
sort = sorted(unbool(i) for i in container)
sliced = itertools.islice(sort, 1, None)
for i, j in zip(sort, sliced):
if i == j:
return False
except (NotImplementedError, TypeError):
seen = []
for e in container:
e = unbool(e)
if e in seen:
return False
seen.append(e)
return True