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GH1033 Add overloads of engine for pd.read_json #1035

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Merged
merged 6 commits into from
Nov 21, 2024
Merged

GH1033 Add overloads of engine for pd.read_json #1035

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7603dde
GHXXX Add overloads of engine for pd.read_json
loicdiridollou Nov 16, 2024
e64c085
GH1033 PR Feedback
loicdiridollou Nov 20, 2024
a7a35bd
Merge branch 'main' of github.com:loicdiridollou/pandas-stubs into gh…
loicdiridollou Nov 20, 2024
b7eb663
GH1033 PR Feedback
loicdiridollou Nov 20, 2024
53af846
GH1033 Fix ignore type
loicdiridollou Nov 20, 2024
62ce800
GH1033 PR feedback
loicdiridollou Nov 21, 2024
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81 changes: 80 additions & 1 deletion pandas-stubs/io/json/_json.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -42,16 +42,42 @@ def read_json(
Literal["strict", "ignore", "replace", "backslashreplace", "surrogateescape"]
| None
) = ...,
lines: bool,
chunksize: int,
compression: CompressionOptions = ...,
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["ujson"] = ...,
) -> JsonReader[Series]: ...
@overload
def read_json(
path_or_buf: FilePath | ReadBuffer[bytes],
*,
orient: JsonSeriesOrient | None = ...,
typ: Literal["series"],
dtype: bool | Mapping[HashableT, DtypeArg] | None = ...,
convert_axes: bool | None = ...,
convert_dates: bool | list[str] = ...,
keep_default_dates: bool = ...,
precise_float: bool = ...,
date_unit: TimeUnit | None = ...,
encoding: str | None = ...,
encoding_errors: (
Literal["strict", "ignore", "replace", "backslashreplace", "surrogateescape"]
| None
) = ...,
lines: Literal[True],
chunksize: int,
compression: CompressionOptions = ...,
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["pyarrow"] = ...,
) -> JsonReader[Series]: ...
@overload
def read_json(
path_or_buf: FilePath | ReadBuffer[str] | ReadBuffer[bytes],
path_or_buf: FilePath | ReadBuffer[bytes],
*,
orient: JsonFrameOrient | None = ...,
typ: Literal["frame"] = ...,
Expand All @@ -72,6 +98,7 @@ def read_json(
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["pyarrow"] = ...,
) -> JsonReader[DataFrame]: ...
@overload
def read_json(
Expand All @@ -96,6 +123,32 @@ def read_json(
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["ujson"] = ...,
) -> Series: ...
@overload
def read_json(
path_or_buf: FilePath | ReadBuffer[bytes],
*,
orient: JsonSeriesOrient | None = ...,
typ: Literal["series"],
dtype: bool | Mapping[HashableT, DtypeArg] | None = ...,
convert_axes: bool | None = ...,
convert_dates: bool | list[str] = ...,
keep_default_dates: bool = ...,
precise_float: bool = ...,
date_unit: TimeUnit | None = ...,
encoding: str | None = ...,
encoding_errors: (
Literal["strict", "ignore", "replace", "backslashreplace", "surrogateescape"]
| None
) = ...,
lines: Literal[True] = ...,
chunksize: None = ...,
compression: CompressionOptions = ...,
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["pyarrow"] = ...,
) -> Series: ...
@overload
def read_json(
Expand All @@ -120,6 +173,32 @@ def read_json(
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["ujson"] = ...,
) -> DataFrame: ...
@overload
def read_json(
path_or_buf: FilePath | ReadBuffer[bytes],
*,
orient: JsonFrameOrient | None = ...,
typ: Literal["frame"] = ...,
dtype: bool | Mapping[HashableT, DtypeArg] | None = ...,
convert_axes: bool | None = ...,
convert_dates: bool | list[str] = ...,
keep_default_dates: bool = ...,
precise_float: bool = ...,
date_unit: TimeUnit | None = ...,
encoding: str | None = ...,
encoding_errors: (
Literal["strict", "ignore", "replace", "backslashreplace", "surrogateescape"]
| None
) = ...,
lines: Literal[True] = ...,
chunksize: None = ...,
compression: CompressionOptions = ...,
nrows: int | None = ...,
storage_options: StorageOptions = ...,
dtype_backend: DtypeBackend | NoDefault = ...,
engine: Literal["pyarrow"] = ...,
) -> DataFrame: ...

class JsonReader(abc.Iterator, Generic[NDFrameT]):
Expand Down
25 changes: 25 additions & 0 deletions tests/test_io.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1625,3 +1625,28 @@ def test_read_excel_index_col() -> None:
),
pd.DataFrame,
)


def test_read_json_engine() -> None:
"""Test the engine argument for `pd.read_json` introduced with pandas 2.0."""
data = """{"index": {"0": 0, "1": 1},
"a": {"0": 1, "1": null},
"b": {"0": 2.5, "1": 4.5},
"c": {"0": true, "1": false},
"d": {"0": "a", "1": "b"},
"e": {"0": 1577.2, "1": 1577.1}}"""
check(
assert_type(pd.read_json(io.StringIO(data), engine="ujson"), pd.DataFrame),
pd.DataFrame,
)

data_lines = b"""{"col 1":"a","col 2":"b"}
{"col 1":"c","col 2":"d"}"""
dd = io.BytesIO(data_lines)
check(
assert_type(
pd.read_json(dd, lines=True, engine="pyarrow"),
pd.DataFrame,
),
pd.DataFrame,
)
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