tsdat.io.writers

Classes

CSVWriter	Converts a xr.Dataset object to a pandas DataFrame and saves the result to a csv
NetCDFWriter	Thin wrapper around xarray's Dataset.to_netcdf() function for saving a dataset to a
ParquetWriter	Writes the dataset to a parquet file.
SplitNetCDFWriter	Wrapper around xarray's Dataset.to_netcdf() function for saving a dataset to a
ZarrWriter	Writes the dataset to a basic zarr archive.

class tsdat.io.writers.CSVWriter

Bases: tsdat.io.base.FileWriter

Converts a xr.Dataset object to a pandas DataFrame and saves the result to a csv file using pd.DataFrame.to_csv(). Properties under the to_csv_kwargs parameter are passed to pd.DataFrame.to_csv() as keyword arguments.

class Parameters

Bases: pydantic.BaseModel

dim_order :Optional[List[str]]

to_csv_kwargs :Dict[str, Any]

file_extension :str = .csv

parameters :CSVWriter.Parameters

Class Methods

write

Writes the dataset to the provided filepath.

Method Descriptions

write(self, dataset: xarray.Dataset, filepath: Optional[pathlib.Path] = None, **kwargs: Any) → None

Writes the dataset to the provided filepath.

This method is typically called by the tsdat storage API, which will be responsible for providing the filepath, including the file extension.

Parameters

• dataset (xr.Dataset) – The dataset to save.

• filepath (Optional[Path]) – The path to the file to save.

class tsdat.io.writers.NetCDFWriter

Bases: tsdat.io.base.FileWriter

Thin wrapper around xarray’s Dataset.to_netcdf() function for saving a dataset to a netCDF file. Properties under the to_netcdf_kwargs parameter will be passed to Dataset.to_netcdf() as keyword arguments.

File compression is used by default to save disk space. To disable compression set the compression_level parameter to 0.

class Parameters

Bases: pydantic.BaseModel

compression_engine :str = zlib

The compression engine to use.

compression_level :int = 1

The level of compression to use (0-9). Set to 0 to not use compression.

to_netcdf_kwargs :Dict[str, Any]

Keyword arguments passed directly to xr.Dataset.to_netcdf().

file_extension :str = .nc

parameters :NetCDFWriter.Parameters

Class Methods

write

Writes the dataset to the provided filepath.

Method Descriptions

write(self, dataset: xarray.Dataset, filepath: Optional[pathlib.Path] = None, **kwargs: Any) → None

Writes the dataset to the provided filepath.

This method is typically called by the tsdat storage API, which will be responsible for providing the filepath, including the file extension.

Parameters

• dataset (xr.Dataset) – The dataset to save.

• filepath (Optional[Path]) – The path to the file to save.

class tsdat.io.writers.ParquetWriter

Bases: tsdat.io.base.FileWriter

Writes the dataset to a parquet file.

Converts a xr.Dataset object to a pandas DataFrame and saves the result to a parquet file using pd.DataFrame.to_parquet(). Properties under the to_parquet_kwargs parameter are passed to pd.DataFrame.to_parquet() as keyword arguments.

class Parameters

Bases: pydantic.BaseModel

dim_order :Optional[List[str]]

to_parquet_kwargs :Dict[str, Any]

file_extension :str = .parquet

parameters :ParquetWriter.Parameters

Class Methods

write

Writes the dataset to the provided filepath.

Method Descriptions

write(self, dataset: xarray.Dataset, filepath: Optional[pathlib.Path] = None, **kwargs: Any) → None

Writes the dataset to the provided filepath.

This method is typically called by the tsdat storage API, which will be responsible for providing the filepath, including the file extension.

Parameters

• dataset (xr.Dataset) – The dataset to save.

• filepath (Optional[Path]) – The path to the file to save.

class tsdat.io.writers.SplitNetCDFWriter

Bases: NetCDFWriter

Wrapper around xarray’s Dataset.to_netcdf() function for saving a dataset to a netCDF file based on a particular time interval, and is an extension of the NetCDFWriter. Files are split (sliced) via a time interval specified in two parts, time_interval a literal value, and a time_unit character (year: “Y”, month: “M”, day: “D”, hour: “h”, minute: “m”, second: “s”).

Properties under the to_netcdf_kwargs parameter will be passed to Dataset.to_netcdf() as keyword arguments. File compression is used by default to save disk space. To disable compression set the compression_level parameter to 0.

class Parameters

Bases: NetCDFWriter

time_interval :int = 1

Time interval value.

time_unit :str = D

Time interval unit.

file_extension :str = .nc

parameters :SplitNetCDFWriter.Parameters

Class Methods

write

Writes the dataset to the provided filepath.

Method Descriptions

write(self, dataset: xarray.Dataset, filepath: Optional[pathlib.Path] = None, **kwargs: Any) → None

Writes the dataset to the provided filepath.

This method is typically called by the tsdat storage API, which will be responsible for providing the filepath, including the file extension.

Parameters

• dataset (xr.Dataset) – The dataset to save.

• filepath (Optional[Path]) – The path to the file to save.

class tsdat.io.writers.ZarrWriter

Bases: tsdat.io.base.FileWriter

Writes the dataset to a basic zarr archive.

Advanced features such as specifying the chunk size or writing the zarr archive in AWS S3 will be implemented later.

class Parameters

Bases: pydantic.BaseModel

to_zarr_kwargs :Dict[str, Any]

file_extension :str = .zarr

parameters :ZarrWriter.Parameters

Class Methods

write

Writes the dataset to the provided filepath.

Method Descriptions

write(self, dataset: xarray.Dataset, filepath: Optional[pathlib.Path] = None, **kwargs: Any) → None

Writes the dataset to the provided filepath.

This method is typically called by the tsdat storage API, which will be responsible for providing the filepath, including the file extension.

Parameters

• dataset (xr.Dataset) – The dataset to save.

• filepath (Optional[Path]) – The path to the file to save.