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import re
import json
from typing import Any, AnyStr, Callable, Dict, IO, Text
__all__ = ["load", "dump_local", "dump_local", "dump_dist", "dumps_dist"]
try:
import ujson
except ImportError:
has_ujson = False
else:
has_ujson = True
#
# load
#
if has_ujson:
load: Callable[[IO[AnyStr]], Any] = ujson.load
else:
load = json.load
#
# loads
#
if has_ujson:
loads: Callable[[AnyStr], Any] = ujson.loads
else:
loads = json.loads
#
# dump/dumps_local options for some libraries
#
_ujson_dump_local_kwargs: Dict[str, Any] = {
'ensure_ascii': False,
'escape_forward_slashes': False,
'indent': 1,
'reject_bytes': True,
}
_json_dump_local_kwargs: Dict[str, Any] = {
'ensure_ascii': False,
'indent': 1,
'separators': (',', ': '),
}
#
# dump_local (for local, non-distributed usage of JSON)
#
if has_ujson:
def dump_local(obj: Any, fp: IO[str]) -> None:
return ujson.dump(obj, fp, **_ujson_dump_local_kwargs)
else:
def dump_local(obj: Any, fp: IO[str]) -> None:
return json.dump(obj, fp, **_json_dump_local_kwargs)
#
# dumps_local (for local, non-distributed usage of JSON)
#
if has_ujson:
def dumps_local(obj: Any) -> Text:
return ujson.dumps(obj, **_ujson_dump_local_kwargs)
else:
def dumps_local(obj: Any) -> Text:
return json.dumps(obj, **_json_dump_local_kwargs)
#
# dump/dumps_dist (for distributed usage of JSON where files should safely roundtrip)
#
_ujson_dump_dist_kwargs: Dict[str, Any] = {
'sort_keys': True,
'indent': 1,
'reject_bytes': True,
'escape_forward_slashes': False,
}
_json_dump_dist_kwargs: Dict[str, Any] = {
'sort_keys': True,
'indent': 1,
'separators': (',', ': '),
}
if has_ujson:
if ujson.dumps([], indent=1) == "[]":
def _ujson_fixup(s: str) -> str:
return s
else:
_ujson_fixup_re = re.compile(r"([\[{])[\n\x20]+([}\]])")
def _ujson_fixup(s: str) -> str:
return _ujson_fixup_re.sub(
lambda m: m.group(1) + m.group(2),
s
)
def dump_dist(obj: Any, fp: IO[str]) -> None:
fp.write(_ujson_fixup(ujson.dumps(obj, **_ujson_dump_dist_kwargs)))
def dumps_dist(obj: Any) -> Text:
return _ujson_fixup(ujson.dumps(obj, **_ujson_dump_dist_kwargs))
else:
def dump_dist(obj: Any, fp: IO[str]) -> None:
json.dump(obj, fp, **_json_dump_dist_kwargs)
def dumps_dist(obj: Any) -> Text:
return json.dumps(obj, **_json_dump_dist_kwargs)