5.1.1.2. LTSV writer¶
- class pytablewriter.LtsvTableWriter(**kwargs: Any)[source]¶
Bases:
CsvTableWriter
A table writer class for Labeled Tab-separated Values (LTSV) format.
- Example:
- add_col_separator_style_filter(style_filter: ColSeparatorStyleFilterFunc) None ¶
Add a style filter function for columns to the writer.
- Parameters:
style_filter –
A function that called for each cell in the table to apply a style to table cells. The function will be required to implement the following Protocol:
class ColSeparatorStyleFilterFunc(Protocol): def __call__( self, left_cell: Optional[Cell], right_cell: Optional[Cell], **kwargs: Any ) -> Optional[Style]: ...
If more than one style filter function is added to the writer, it will be called from the last one added. These style functions should return
None
when not needed to apply styles. If all of the style functions returnedNone
,default_style
will be applied.You can pass keyword arguments to style filter functions via
style_filter_kwargs
. In default, the attribute includes:writer
: the writer instance that the caller of astyle_filter function
- add_style_filter(style_filter: StyleFilterFunc) None ¶
Add a style filter function to the writer.
- Parameters:
style_filter –
A function called for each table cell to apply a style to table cells. The function will be required to implement the following Protocol:
class StyleFilterFunc(Protocol): def __call__(self, cell: Cell, **kwargs: Any) -> Optional[Style]: ...
If more than one style filter function is added to the writer, it will be called from the last one added. These style functions should return
None
when not needed to apply styles. If all of the style functions returnedNone
,default_style
will be used.You can pass keyword arguments to style filter functions via
style_filter_kwargs
. In default, the attribute includes:writer
: the writer instance that the caller of astyle_filter function
- clear_theme() None ¶
Remove all of the style filters.
- close() None ¶
Close the current
stream
.
- disable_style_filter(clear_filters: bool = False) None ¶
Disable style filters.
- Parameters:
clear_filters (bool) – If
True
, clear all of the style filters. Defaults toFalse
.
- dump(output: str | IO, close_after_write: bool = True, **kwargs: Any) None ¶
Write data to the output with tabular format.
During the executing this method,
enable_ansi_escape
attribute will be temporarily set toFalse
.- Parameters:
output – The value must either an output stream or a path to an output file.
close_after_write – Close the output after write. Defaults to
True
.
- dumps(**kwargs: Any) str ¶
Get rendered tabular text from the table data.
Only available for text format table writers.
- Parameters:
**kwargs – Optional arguments that the writer takes.
- Returns:
Rendered tabular text.
- Return type:
str
- enable_style_filter() None ¶
Enable style filters.
- property format_name: str¶
Format name for the writer.
- Returns:
str
- from_csv(csv_source: str, delimiter: str = ',') None ¶
Set tabular attributes to the writer from a character-separated values (CSV) data source. The following attributes are set to the writer by the method:
table_name
also be set if the CSV data source is a file. In that case,table_name
is as same as the filename.- Parameters:
csv_source (str) – Input CSV data source can be designated CSV text or a CSV file path.
delimiter (str) – Delimiter character of the CSV data source. Defaults to
,
.
Examples
Using CSV as a tabular data source
- Dependency Packages:
- from_dataframe(dataframe: pandas.DataFrame, add_index_column: bool = False, overwrite_type_hints: bool = True) None ¶
Set tabular attributes to the writer from
pandas.DataFrame
. The following attributes are set by the method:- Parameters:
dataframe (pandas.DataFrame or
str
) – Input pandas.DataFrame object or path to a DataFrame pickle.add_index_column (bool, optional) – If
True
, add a column ofindex
of thedataframe
. Defaults toFalse
.overwrite_type_hints (bool) – If
True
, Overwrite type hints with dtypes within the DataFrame.
Example
- from_series(series: pandas.Series, add_index_column: bool = True) None ¶
Set tabular attributes to the writer from
pandas.Series
. The following attributes are set by the method:- Parameters:
series (pandas.Series) – Input pandas.Series object.
add_index_column (bool, optional) – If
True
, add a column ofindex
of theseries
. Defaults toTrue
.
- from_tabledata(value: TableData, is_overwrite_table_name: bool = True) None ¶
Set tabular attributes to the writer from TableData. The following attributes are configured:
TableData can be created from various data formats by
pytablereader
. More detailed information can be found in https://pytablereader.rtfd.io/en/latest/- Parameters:
value (tabledata.TableData) – Input table data.
- from_tablib(tablib_dataset: tablib.Dataset) None ¶
Set tabular attributes to the writer from
tablib.Dataset
.
- from_writer(writer: AbstractTableWriter, is_overwrite_table_name: bool = True) None ¶
Copy attributes from another table writer class instance.
- Parameters:
writer (pytablewriter.writer.AbstractTableWriter) – Another table writer instance.
is_overwrite_table_name (bool, optional) – Overwrite the table name of the writer with the table name of the
writer
. Defaults toTrue
.
- property headers: Sequence[str]¶
Headers of a table to be outputted.
- Type:
Sequence[str]
- set_style(column: str | int, style: Style) None ¶
Set
Style
for a specific column.- Parameters:
column (
int
orstr
) – Column specifier. Column index or header name correlated with the column.style (
Style
) – Style value to be set to the column.
- Raises:
ValueError – Raised when the column specifier is invalid.
- set_theme(theme: str, **kwargs: Any) None ¶
Set style filters for a theme.
- Parameters:
theme (str) – Name of the theme. pytablewriter theme plugin must be installed corresponding to the theme name.
- Raises:
RuntimeError – Raised when a theme plugin does not install.
- property support_split_write: bool¶
Indicates whether the writer class supports iterative table writing (
write_table_iter
) method.- Returns:
True
if the writer supported iterative table writing.- Return type:
bool
- property table_format: TableFormat¶
Get the format of the writer.
- Type:
- property table_name: str¶
Name of a table.
- Type:
str
- property tabledata: TableData¶
Get tabular data of the writer.
- Type:
tabledata.TableData
- property type_hints: List[Type[AbstractType] | None]¶
Type hints for each column of the tabular data. Writers convert data for each column using the type hints information before writing tables when you call
write_xxx
methods.Acceptable values are as follows:
None
(automatically detect column type from values in the column)pytablewriter.typehint.Bool
or"bool"
pytablewriter.typehint.DateTime
or"datetime"
pytablewriter.typehint.Dictionary
or"dict"
pytablewriter.typehint.Infinity
or"inf"
pytablewriter.typehint.Integer
or"int"
pytablewriter.typehint.IpAddress
or"ipaddr"
pytablewriter.typehint.List
or"list"
pytablewriter.typehint.Nan
or"nan"
pytablewriter.typehint.NoneType
or"none"
pytablewriter.typehint.NullString
or"nullstr"
pytablewriter.typehint.RealNumber
or"realnumber"
or"float"
pytablewriter.typehint.String
or"str"
If a type-hint value is not
None
, the writer tries to convert data for each data in a column to type-hint class. If the type-hint value isNone
or failed to convert data, the writer automatically detects column data type from the column data.If
type_hints
isNone
, the writer automatically detects data types for all of the columns and writes a table using detected column types.Defaults to
None
.Examples
- property value_matrix: Sequence¶
Data of a table to be outputted.
- write_null_line() None ¶
Write a null line to the
stream
.
- write_table(**kwargs: Any) None [source]¶
Write a table to the
stream
with Labeled Tab-separated Values (LTSV) format. Invalid characters in labels/data are removed.- Example:
- write_table_iter(**kwargs: Any) None ¶
Write a table with iteration. “Iteration” means that divide the table writing into multiple writes. This method is helpful, especially for extensive data. The following are the premises to execute this method:
set iterator to the
value_matrix
set the number of iterations to the
iteration_length
attribute
Call back function (Optional): A callback function is called when each iteration of writing a table is completed. You can set a callback function via the
write_callback
attribute.- Raises:
pytablewriter.NotSupportedError – If the writer class does not support this method.
Note
The following classes do not support this method:
support_split_write
attribute returnTrue
if the class is supporting this method.