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Adding upstream version 2.1.0.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-07 00:47:33 +01:00
parent d1aeef90c9
commit d8a70e48ab
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
56 changed files with 3865 additions and 0 deletions
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13
cli_helpers/tabular_output/__init__.py Normal file
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# -*- coding: utf-8 -*-
"""CLI Helper's tabular output module makes it easy to format your data using
various formatting libraries.
When formatting data, you'll primarily use the
:func:`~cli_helpers.tabular_output.format_output` function and
:class:`~cli_helpers.tabular_output.TabularOutputFormatter` class.
"""
from .output_formatter import format_output, TabularOutputFormatter
__all__ = ['format_output', 'TabularOutputFormatter']

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cli_helpers/tabular_output/delimited_output_adapter.py Normal file
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# -*- coding: utf-8 -*-
"""A delimited data output adapter (e.g. CSV, TSV)."""
from __future__ import unicode_literals
import contextlib
from cli_helpers.compat import csv, StringIO
from cli_helpers.utils import filter_dict_by_key
from .preprocessors import bytes_to_string, override_missing_value
supported_formats = ('csv', 'csv-tab')
preprocessors = (override_missing_value, bytes_to_string)
class linewriter(object):
def __init__(self):
self.reset()
def reset(self):
self.line = None
def write(self, d):
self.line = d
def adapter(data, headers, table_format='csv', **kwargs):
"""Wrap the formatting inside a function for TabularOutputFormatter."""
keys = ('dialect', 'delimiter', 'doublequote', 'escapechar',
'quotechar', 'quoting', 'skipinitialspace', 'strict')
if table_format == 'csv':
delimiter = ','
elif table_format == 'csv-tab':
delimiter = '\t'
else:
raise ValueError('Invalid table_format specified.')
ckwargs = {'delimiter': delimiter, 'lineterminator': ''}
ckwargs.update(filter_dict_by_key(kwargs, keys))
l = linewriter()
writer = csv.writer(l, **ckwargs)
writer.writerow(headers)
yield l.line
for row in data:
l.reset()
writer.writerow(row)
yield l.line

228
cli_helpers/tabular_output/output_formatter.py Normal file
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# -*- coding: utf-8 -*-
"""A generic tabular data output formatter interface."""
from __future__ import unicode_literals
from collections import namedtuple
from cli_helpers.compat import (text_type, binary_type, int_types, float_types,
zip_longest)
from cli_helpers.utils import unique_items
from . import (delimited_output_adapter, vertical_table_adapter,
tabulate_adapter, terminaltables_adapter, tsv_output_adapter)
from decimal import Decimal
import itertools
MISSING_VALUE = '<null>'
MAX_FIELD_WIDTH = 500
TYPES = {
type(None): 0,
bool: 1,
int: 2,
float: 3,
Decimal: 3,
binary_type: 4,
text_type: 5
}
OutputFormatHandler = namedtuple(
'OutputFormatHandler',
'format_name preprocessors formatter formatter_args')
class TabularOutputFormatter(object):
"""An interface to various tabular data formatting libraries.
The formatting libraries supported include:
- `tabulate <https://bitbucket.org/astanin/python-tabulate>`_
- `terminaltables <https://robpol86.github.io/terminaltables/>`_
- a CLI Helper vertical table layout
- delimited formats (CSV and TSV)
:param str format_name: An optional, default format name.
Usage::
>>> from cli_helpers.tabular_output import TabularOutputFormatter
>>> formatter = TabularOutputFormatter(format_name='simple')
>>> data = ((1, 87), (2, 80), (3, 79))
>>> headers = ('day', 'temperature')
>>> print(formatter.format_output(data, headers))
day temperature
----- -------------
1 87
2 80
3 79
You can use any :term:`iterable` for the data or headers::
>>> data = enumerate(('87', '80', '79'), 1)
>>> print(formatter.format_output(data, headers))
day temperature
----- -------------
1 87
2 80
3 79
"""
_output_formats = {}
def __init__(self, format_name=None):
"""Set the default *format_name*."""
self._format_name = None
if format_name:
self.format_name = format_name
@property
def format_name(self):
"""The current format name.
This value must be in :data:`supported_formats`.
"""
return self._format_name
@format_name.setter
def format_name(self, format_name):
"""Set the default format name.
:param str format_name: The display format name.
:raises ValueError: if the format is not recognized.
"""
if format_name in self.supported_formats:
self._format_name = format_name
else:
raise ValueError('unrecognized format_name "{}"'.format(
format_name))
@property
def supported_formats(self):
"""The names of the supported output formats in a :class:`tuple`."""
return tuple(self._output_formats.keys())
@classmethod
def register_new_formatter(cls, format_name, handler, preprocessors=(),
kwargs=None):
"""Register a new output formatter.
:param str format_name: The name of the format.
:param callable handler: The function that formats the data.
:param tuple preprocessors: The preprocessors to call before
formatting.
:param dict kwargs: Keys/values for keyword argument defaults.
"""
cls._output_formats[format_name] = OutputFormatHandler(
format_name, preprocessors, handler, kwargs or {})
def format_output(self, data, headers, format_name=None,
preprocessors=(), column_types=None, **kwargs):
r"""Format the headers and data using a specific formatter.
*format_name* must be a supported formatter (see
:attr:`supported_formats`).
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str format_name: The display format to use (optional, if the
:class:`TabularOutputFormatter` object has a default format set).
:param tuple preprocessors: Additional preprocessors to call before
any formatter preprocessors.
:param \*\*kwargs: Optional arguments for the formatter.
:return: The formatted data.
:rtype: str
:raises ValueError: If the *format_name* is not recognized.
"""
format_name = format_name or self._format_name
if format_name not in self.supported_formats:
raise ValueError('unrecognized format "{}"'.format(format_name))
(_, _preprocessors, formatter,
fkwargs) = self._output_formats[format_name]
fkwargs.update(kwargs)
if column_types is None:
data = list(data)
column_types = self._get_column_types(data)
for f in unique_items(preprocessors + _preprocessors):
data, headers = f(data, headers, column_types=column_types,
**fkwargs)
return formatter(list(data), headers, column_types=column_types, **fkwargs)
def _get_column_types(self, data):
"""Get a list of the data types for each column in *data*."""
columns = list(zip_longest(*data))
return [self._get_column_type(column) for column in columns]
def _get_column_type(self, column):
"""Get the most generic data type for iterable *column*."""
type_values = [TYPES[self._get_type(v)] for v in column]
inverse_types = {v: k for k, v in TYPES.items()}
return inverse_types[max(type_values)]
def _get_type(self, value):
"""Get the data type for *value*."""
if value is None:
return type(None)
elif type(value) in int_types:
return int
elif type(value) in float_types:
return float
elif isinstance(value, binary_type):
return binary_type
else:
return text_type
def format_output(data, headers, format_name, **kwargs):
r"""Format output using *format_name*.
This is a wrapper around the :class:`TabularOutputFormatter` class.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str format_name: The display format to use.
:param \*\*kwargs: Optional arguments for the formatter.
:return: The formatted data.
:rtype: str
"""
formatter = TabularOutputFormatter(format_name=format_name)
return formatter.format_output(data, headers, **kwargs)
for vertical_format in vertical_table_adapter.supported_formats:
TabularOutputFormatter.register_new_formatter(
vertical_format, vertical_table_adapter.adapter,
vertical_table_adapter.preprocessors,
{'table_format': vertical_format, 'missing_value': MISSING_VALUE, 'max_field_width': None})
for delimited_format in delimited_output_adapter.supported_formats:
TabularOutputFormatter.register_new_formatter(
delimited_format, delimited_output_adapter.adapter,
delimited_output_adapter.preprocessors,
{'table_format': delimited_format, 'missing_value': '', 'max_field_width': None})
for tabulate_format in tabulate_adapter.supported_formats:
TabularOutputFormatter.register_new_formatter(
tabulate_format, tabulate_adapter.adapter,
tabulate_adapter.preprocessors +
(tabulate_adapter.style_output_table(tabulate_format),),
{'table_format': tabulate_format, 'missing_value': MISSING_VALUE, 'max_field_width': MAX_FIELD_WIDTH})
for terminaltables_format in terminaltables_adapter.supported_formats:
TabularOutputFormatter.register_new_formatter(
terminaltables_format, terminaltables_adapter.adapter,
terminaltables_adapter.preprocessors +
(terminaltables_adapter.style_output_table(terminaltables_format),),
{'table_format': terminaltables_format, 'missing_value': MISSING_VALUE, 'max_field_width': MAX_FIELD_WIDTH})
for tsv_format in tsv_output_adapter.supported_formats:
TabularOutputFormatter.register_new_formatter(
tsv_format, tsv_output_adapter.adapter,
tsv_output_adapter.preprocessors,
{'table_format': tsv_format, 'missing_value': '', 'max_field_width': None})

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cli_helpers/tabular_output/preprocessors.py Normal file
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# -*- coding: utf-8 -*-
"""These preprocessor functions are used to process data prior to output."""
import string
from cli_helpers import utils
from cli_helpers.compat import text_type, int_types, float_types, HAS_PYGMENTS
def truncate_string(data, headers, max_field_width=None, skip_multiline_string=True, **_):
"""Truncate very long strings. Only needed for tabular
representation, because trying to tabulate very long data
is problematic in terms of performance, and does not make any
sense visually.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param int max_field_width: Width to truncate field for display
:return: The processed data and headers.
:rtype: tuple
"""
return (([utils.truncate_string(v, max_field_width, skip_multiline_string) for v in row] for row in data),
[utils.truncate_string(h, max_field_width, skip_multiline_string) for h in headers])
def convert_to_string(data, headers, **_):
"""Convert all *data* and *headers* to strings.
Binary data that cannot be decoded is converted to a hexadecimal
representation via :func:`binascii.hexlify`.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:return: The processed data and headers.
:rtype: tuple
"""
return (([utils.to_string(v) for v in row] for row in data),
[utils.to_string(h) for h in headers])
def override_missing_value(data, headers, style=None,
missing_value_token="Token.Output.Null",
missing_value='', **_):
"""Override missing values in the *data* with *missing_value*.
A missing value is any value that is :data:`None`.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param style: Style for missing_value.
:param missing_value_token: The Pygments token used for missing data.
:param missing_value: The default value to use for missing data.
:return: The processed data and headers.
:rtype: tuple
"""
def fields():
for row in data:
processed = []
for field in row:
if field is None and style and HAS_PYGMENTS:
styled = utils.style_field(missing_value_token, missing_value, style)
processed.append(styled)
elif field is None:
processed.append(missing_value)
else:
processed.append(field)
yield processed
return (fields(), headers)
def override_tab_value(data, headers, new_value=' ', **_):
"""Override tab values in the *data* with *new_value*.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param new_value: The new value to use for tab.
:return: The processed data and headers.
:rtype: tuple
"""
return (([v.replace('\t', new_value) if isinstance(v, text_type) else v
for v in row] for row in data),
headers)
def escape_newlines(data, headers, **_):
"""Escape newline characters (\n -> \\n, \r -> \\r)
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:return: The processed data and headers.
:rtype: tuple
"""
return (
(
[
v.replace("\r", r"\r").replace("\n", r"\n")
if isinstance(v, text_type)
else v
for v in row
]
for row in data
),
headers,
)
def bytes_to_string(data, headers, **_):
"""Convert all *data* and *headers* bytes to strings.
Binary data that cannot be decoded is converted to a hexadecimal
representation via :func:`binascii.hexlify`.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:return: The processed data and headers.
:rtype: tuple
"""
return (([utils.bytes_to_string(v) for v in row] for row in data),
[utils.bytes_to_string(h) for h in headers])
def align_decimals(data, headers, column_types=(), **_):
"""Align numbers in *data* on their decimal points.
Whitespace padding is added before a number so that all numbers in a
column are aligned.
Outputting data before aligning the decimals::
1
2.1
10.59
Outputting data after aligning the decimals::
1
2.1
10.59
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param iterable column_types: The columns' type objects (e.g. int or float).
:return: The processed data and headers.
:rtype: tuple
"""
pointpos = len(headers) * [0]
data = list(data)
for row in data:
for i, v in enumerate(row):
if column_types[i] is float and type(v) in float_types:
v = text_type(v)
pointpos[i] = max(utils.intlen(v), pointpos[i])
def results(data):
for row in data:
result = []
for i, v in enumerate(row):
if column_types[i] is float and type(v) in float_types:
v = text_type(v)
result.append((pointpos[i] - utils.intlen(v)) * " " + v)
else:
result.append(v)
yield result
return results(data), headers
def quote_whitespaces(data, headers, quotestyle="'", **_):
"""Quote leading/trailing whitespace in *data*.
When outputing data with leading or trailing whitespace, it can be useful
to put quotation marks around the value so the whitespace is more
apparent. If one value in a column needs quoted, then all values in that
column are quoted to keep things consistent.
.. NOTE::
:data:`string.whitespace` is used to determine which characters are
whitespace.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str quotestyle: The quotation mark to use (defaults to ``'``).
:return: The processed data and headers.
:rtype: tuple
"""
whitespace = tuple(string.whitespace)
quote = len(headers) * [False]
data = list(data)
for row in data:
for i, v in enumerate(row):
v = text_type(v)
if v.startswith(whitespace) or v.endswith(whitespace):
quote[i] = True
def results(data):
for row in data:
result = []
for i, v in enumerate(row):
quotation = quotestyle if quote[i] else ''
result.append('{quotestyle}{value}{quotestyle}'.format(
quotestyle=quotation, value=v))
yield result
return results(data), headers
def style_output(data, headers, style=None,
header_token='Token.Output.Header',
odd_row_token='Token.Output.OddRow',
even_row_token='Token.Output.EvenRow', **_):
"""Style the *data* and *headers* (e.g. bold, italic, and colors)
.. NOTE::
This requires the `Pygments <http://pygments.org/>`_ library to
be installed. You can install it with CLI Helpers as an extra::
$ pip install cli_helpers[styles]
Example usage::
from cli_helpers.tabular_output.preprocessors import style_output
from pygments.style import Style
from pygments.token import Token
class YourStyle(Style):
default_style = ""
styles = {
Token.Output.Header: 'bold ansibrightred',
Token.Output.OddRow: 'bg:#eee #111',
Token.Output.EvenRow: '#0f0'
}
headers = ('First Name', 'Last Name')
data = [['Fred', 'Roberts'], ['George', 'Smith']]
data, headers = style_output(data, headers, style=YourStyle)
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str/pygments.style.Style style: A Pygments style. You can `create
your own styles <https://pygments.org/docs/styles#creating-own-styles>`_.
:param str header_token: The token type to be used for the headers.
:param str odd_row_token: The token type to be used for odd rows.
:param str even_row_token: The token type to be used for even rows.
:return: The styled data and headers.
:rtype: tuple
"""
from cli_helpers.utils import filter_style_table
relevant_styles = filter_style_table(style, header_token, odd_row_token, even_row_token)
if style and HAS_PYGMENTS:
if relevant_styles.get(header_token):
headers = [utils.style_field(header_token, header, style) for header in headers]
if relevant_styles.get(odd_row_token) or relevant_styles.get(even_row_token):
data = ([utils.style_field(odd_row_token if i % 2 else even_row_token, f, style)
for f in r] for i, r in enumerate(data, 1))
return iter(data), headers
def format_numbers(data, headers, column_types=(), integer_format=None,
float_format=None, **_):
"""Format numbers according to a format specification.
This uses Python's format specification to format numbers of the following
types: :class:`int`, :class:`py2:long` (Python 2), :class:`float`, and
:class:`~decimal.Decimal`. See the :ref:`python:formatspec` for more
information about the format strings.
.. NOTE::
A column is only formatted if all of its values are the same type
(except for :data:`None`).
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param iterable column_types: The columns' type objects (e.g. int or float).
:param str integer_format: The format string to use for integer columns.
:param str float_format: The format string to use for float columns.
:return: The processed data and headers.
:rtype: tuple
"""
if (integer_format is None and float_format is None) or not column_types:
return iter(data), headers
def _format_number(field, column_type):
if integer_format and column_type is int and type(field) in int_types:
return format(field, integer_format)
elif float_format and column_type is float and type(field) in float_types:
return format(field, float_format)
return field
data = ([_format_number(v, column_types[i]) for i, v in enumerate(row)] for row in data)
return data, headers

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cli_helpers/tabular_output/tabulate_adapter.py Normal file
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# -*- coding: utf-8 -*-
"""Format adapter for the tabulate module."""
from __future__ import unicode_literals
from cli_helpers.utils import filter_dict_by_key
from cli_helpers.compat import (Terminal256Formatter, StringIO)
from .preprocessors import (convert_to_string, truncate_string, override_missing_value,
style_output, HAS_PYGMENTS)
import tabulate
supported_markup_formats = ('mediawiki', 'html', 'latex', 'latex_booktabs',
'textile', 'moinmoin', 'jira')
supported_table_formats = ('plain', 'simple', 'grid', 'fancy_grid', 'pipe',
'orgtbl', 'psql', 'rst')
supported_formats = supported_markup_formats + supported_table_formats
preprocessors = (override_missing_value, convert_to_string, truncate_string, style_output)
def style_output_table(format_name=""):
def style_output(data, headers, style=None,
table_separator_token='Token.Output.TableSeparator', **_):
"""Style the *table* a(e.g. bold, italic, and colors)
.. NOTE::
This requires the `Pygments <http://pygments.org/>`_ library to
be installed. You can install it with CLI Helpers as an extra::
$ pip install cli_helpers[styles]
Example usage::
from cli_helpers.tabular_output import tabulate_adapter
from pygments.style import Style
from pygments.token import Token
class YourStyle(Style):
default_style = ""
styles = {
Token.Output.TableSeparator: '#ansigray'
}
headers = ('First Name', 'Last Name')
data = [['Fred', 'Roberts'], ['George', 'Smith']]
style_output_table = tabulate_adapter.style_output_table('psql')
style_output_table(data, headers, style=CliStyle)
data, headers = style_output(data, headers, style=YourStyle)
output = tabulate_adapter.adapter(data, headers, style=YourStyle)
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str/pygments.style.Style style: A Pygments style. You can `create
your own styles <https://pygments.org/docs/styles#creating-own-styles>`_.
:param str table_separator_token: The token type to be used for the table separator.
:return: data and headers.
:rtype: tuple
"""
if style and HAS_PYGMENTS and format_name in supported_table_formats:
formatter = Terminal256Formatter(style=style)
def style_field(token, field):
"""Get the styled text for a *field* using *token* type."""
s = StringIO()
formatter.format(((token, field),), s)
return s.getvalue()
def addColorInElt(elt):
if not elt:
return elt
if elt.__class__ == tabulate.Line:
return tabulate.Line(*(style_field(table_separator_token, val) for val in elt))
if elt.__class__ == tabulate.DataRow:
return tabulate.DataRow(*(style_field(table_separator_token, val) for val in elt))
return elt
srcfmt = tabulate._table_formats[format_name]
newfmt = tabulate.TableFormat(
*(addColorInElt(val) for val in srcfmt))
tabulate._table_formats[format_name] = newfmt
return iter(data), headers
return style_output
def adapter(data, headers, table_format=None, preserve_whitespace=False,
**kwargs):
"""Wrap tabulate inside a function for TabularOutputFormatter."""
keys = ('floatfmt', 'numalign', 'stralign', 'showindex', 'disable_numparse')
tkwargs = {'tablefmt': table_format}
tkwargs.update(filter_dict_by_key(kwargs, keys))
if table_format in supported_markup_formats:
tkwargs.update(numalign=None, stralign=None)
tabulate.PRESERVE_WHITESPACE = preserve_whitespace
return iter(tabulate.tabulate(data, headers, **tkwargs).split('\n'))

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# -*- coding: utf-8 -*-
"""Format adapter for the terminaltables module."""
from __future__ import unicode_literals
import terminaltables
import itertools
from cli_helpers.utils import filter_dict_by_key
from cli_helpers.compat import (Terminal256Formatter, StringIO)
from .preprocessors import (convert_to_string, truncate_string, override_missing_value,
style_output, HAS_PYGMENTS,
override_tab_value, escape_newlines)
supported_formats = ('ascii', 'double', 'github')
preprocessors = (
override_missing_value, convert_to_string, override_tab_value,
truncate_string, style_output, escape_newlines
)
table_format_handler = {
'ascii': terminaltables.AsciiTable,
'double': terminaltables.DoubleTable,
'github': terminaltables.GithubFlavoredMarkdownTable,
}
def style_output_table(format_name=""):
def style_output(data, headers, style=None,
table_separator_token='Token.Output.TableSeparator', **_):
"""Style the *table* (e.g. bold, italic, and colors)
.. NOTE::
This requires the `Pygments <http://pygments.org/>`_ library to
be installed. You can install it with CLI Helpers as an extra::
$ pip install cli_helpers[styles]
Example usage::
from cli_helpers.tabular_output import terminaltables_adapter
from pygments.style import Style
from pygments.token import Token
class YourStyle(Style):
default_style = ""
styles = {
Token.Output.TableSeparator: '#ansigray'
}
headers = ('First Name', 'Last Name')
data = [['Fred', 'Roberts'], ['George', 'Smith']]
style_output_table = terminaltables_adapter.style_output_table('psql')
style_output_table(data, headers, style=CliStyle)
output = terminaltables_adapter.adapter(data, headers, style=YourStyle)
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str/pygments.style.Style style: A Pygments style. You can `create
your own styles <https://pygments.org/docs/styles#creating-own-styles>`_.
:param str table_separator_token: The token type to be used for the table separator.
:return: data and headers.
:rtype: tuple
"""
if style and HAS_PYGMENTS and format_name in supported_formats:
formatter = Terminal256Formatter(style=style)
def style_field(token, field):
"""Get the styled text for a *field* using *token* type."""
s = StringIO()
formatter.format(((token, field),), s)
return s.getvalue()
clss = table_format_handler[format_name]
for char in [char for char in terminaltables.base_table.BaseTable.__dict__ if char.startswith("CHAR_")]:
setattr(clss, char, style_field(
table_separator_token, getattr(clss, char)))
return iter(data), headers
return style_output
def adapter(data, headers, table_format=None, **kwargs):
"""Wrap terminaltables inside a function for TabularOutputFormatter."""
keys = ('title', )
table = table_format_handler[table_format]
t = table([headers] + list(data), **filter_dict_by_key(kwargs, keys))
dimensions = terminaltables.width_and_alignment.max_dimensions(
t.table_data,
t.padding_left,
t.padding_right)[:3]
for r in t.gen_table(*dimensions):
yield u''.join(r)

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cli_helpers/tabular_output/tsv_output_adapter.py Normal file
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# -*- coding: utf-8 -*-
"""A tsv data output adapter"""
from __future__ import unicode_literals
from .preprocessors import bytes_to_string, override_missing_value, convert_to_string
from itertools import chain
from cli_helpers.utils import replace
supported_formats = ('tsv',)
preprocessors = (override_missing_value, bytes_to_string, convert_to_string)
def adapter(data, headers, **kwargs):
"""Wrap the formatting inside a function for TabularOutputFormatter."""
for row in chain((headers,), data):
yield "\t".join((replace(r, (('\n', r'\n'), ('\t', r'\t'))) for r in row))

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cli_helpers/tabular_output/vertical_table_adapter.py Normal file
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# -*- coding: utf-8 -*-
"""Format data into a vertical table layout."""
from __future__ import unicode_literals
from cli_helpers.utils import filter_dict_by_key
from .preprocessors import (convert_to_string, override_missing_value,
style_output)
supported_formats = ('vertical', )
preprocessors = (override_missing_value, convert_to_string, style_output)
def _get_separator(num, sep_title, sep_character, sep_length):
"""Get a row separator for row *num*."""
left_divider_length = right_divider_length = sep_length
if isinstance(sep_length, tuple):
left_divider_length, right_divider_length = sep_length
left_divider = sep_character * left_divider_length
right_divider = sep_character * right_divider_length
title = sep_title.format(n=num + 1)
return "{left_divider}[ {title} ]{right_divider}\n".format(
left_divider=left_divider, right_divider=right_divider, title=title)
def _format_row(headers, row):
"""Format a row."""
formatted_row = [' | '.join(field) for field in zip(headers, row)]
return '\n'.join(formatted_row)
def vertical_table(data, headers, sep_title='{n}. row', sep_character='*',
sep_length=27):
"""Format *data* and *headers* as an vertical table.
The values in *data* and *headers* must be strings.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str sep_title: The title given to each row separator. Defaults to
``'{n}. row'``. Any instance of ``'{n}'`` is
replaced by the record number.
:param str sep_character: The character used to separate rows. Defaults to
``'*'``.
:param int/tuple sep_length: The number of separator characters that should
appear on each side of the *sep_title*. Use
a tuple to specify the left and right values
separately.
:return: The formatted data.
:rtype: str
"""
header_len = max([len(x) for x in headers])
padded_headers = [x.ljust(header_len) for x in headers]
formatted_rows = [_format_row(padded_headers, row) for row in data]
output = []
for i, result in enumerate(formatted_rows):
yield _get_separator(i, sep_title, sep_character, sep_length) + result
def adapter(data, headers, **kwargs):
"""Wrap vertical table in a function for TabularOutputFormatter."""
keys = ('sep_title', 'sep_character', 'sep_length')
return vertical_table(data, headers, **filter_dict_by_key(kwargs, keys))