| ''' |
| Iterative JSON parser. |
| |
| Main API: |
| |
| - ``ijson.parse``: iterator returning parsing events with the object tree context, |
| see ``ijson.common.parse`` for docs. |
| |
| - ``ijson.items``: iterator returning Python objects found under a specified prefix, |
| see ``ijson.common.items`` for docs. |
| |
| Top-level ``ijson`` module exposes method from the pure Python backend. There's |
| also two other backends using the C library yajl in ``ijson.backends`` that have |
| the same API and are faster under CPython. |
| ''' |
| from ijson.adapters import from_iter |
| from ijson.common import JSONError, IncompleteJSONError, ObjectBuilder |
|
|
| from ijson.utils import coroutine, sendable_list |
| from .version import __version__ |
|
|
|
|
| ALL_BACKENDS = ('yajl2_c', 'yajl2_cffi', 'yajl2', 'yajl', 'python') |
| """ |
| All supported backends, in descending order or speed. Not all might be available at |
| runtime. |
| """ |
|
|
| def get_backend(backend): |
| """Import the backend named ``backend``""" |
| import importlib |
| return importlib.import_module('ijson.backends.' + backend) |
|
|
| def _default_backend(): |
| import os |
| if 'IJSON_BACKEND' in os.environ: |
| return get_backend(os.environ['IJSON_BACKEND']) |
| for backend in ALL_BACKENDS: |
| try: |
| return get_backend(backend) |
| except ImportError: |
| continue |
| raise ImportError('no backends available') |
| backend = _default_backend() |
| del _default_backend |
|
|
| basic_parse = backend.basic_parse |
| basic_parse_coro = backend.basic_parse_coro |
| parse = backend.parse |
| parse_coro = backend.parse_coro |
| items = backend.items |
| items_coro = backend.items_coro |
| kvitems = backend.kvitems |
| kvitems_coro = backend.kvitems_coro |
| basic_parse_async = backend.basic_parse_async |
| parse_async = backend.parse_async |
| items_async = backend.items_async |
| kvitems_async = backend.kvitems_async |
| backend_name = backend.backend_name |
| backend = backend.backend |
