def get_analyzers_tables(
self,
analyzer: bt.analyzers.Analyzer) -> (Paragraph, List[DataTable]):
"""Return a header for this analyzer and one *or more* data tables."""
if hasattr(analyzer, 'get_analysis_table'):
title, table_columns_list = analyzer.get_analysis_table()
else:
# Analyzer does not provide a table function. Use our generic one
title, table_columns_list = TableGenerator._get_analysis_table_generic(
analyzer)
param_str = get_params_str(analyzer.params)
if len(param_str) > 0:
title += f' ({param_str})'
elems: List[DataTable] = []
for table_columns in table_columns_list:
cds = ColumnDataSource()
columns = []
for i, c in enumerate(table_columns):
col_name = f'col{i}'
cds.add(c[2:], col_name)
columns.append(
TableColumn(field=col_name,
title=c[0],
formatter=self._get_formatter(c[1])))
column_height = len(table_columns[0]) * 25
elems.append(
DataTable(source=cds,
columns=columns,
index_position=None,
height=column_height))
return Paragraph(text=title, style={'font-size': 'large'}), elems
def _get_analysis_table_generic(analyzer: bt.analyzers.Analyzer) -> Tuple[object, List[object]]:
"""Returns two columns labeled 'Performance' and 'Value'"""
table = [['Performance', ColummDataType.STRING], ['Value', ColummDataType.STRING]]
def add_to_table(item: object, baselabel: str = ""):
for ak, av in item.items():
label = f"{baselabel} - {ak}" if len(baselabel) > 0 else ak
if isinstance(av, (bt.AutoOrderedDict, OrderedDict)):
add_to_table(av, label)
else:
table[0].append(label)
table[1].append(av)
add_to_table(analyzer.get_analysis())
return type(analyzer).__name__, [table]
def get_analyzers_tables(
self, analyzer: bt.analyzers.Analyzer, strategy: bt.Strategy,
params: Optional[bt.AutoInfoClass]
) -> (Paragraph, List[DataTable]):
if hasattr(analyzer, 'get_analysis_table'):
title, table_columns_list = analyzer.get_analysis_table()
else:
# Analyzer does not provide a table function. Use our generic one
title, table_columns_list = TableGenerator._get_analysis_table_generic(
analyzer)
# if we have multiple strategies in the mix, add the name of the involved one
if len(strategy.env.strats) > 0:
title += f' ({get_strategy_label(strategy, params)})'
elems: List[DataTable] = []
for table_columns in table_columns_list:
cds = ColumnDataSource()
columns = []
for i, c in enumerate(table_columns):
col_name = f'col{i}'
cds.add(c[2:], col_name)
columns.append(
TableColumn(field=col_name,
title=c[0],
formatter=TableGenerator._get_formatter(c[1])))
column_height = len(table_columns[0]) * 25
elems.append(
DataTable(source=cds,
columns=columns,
width=self._scheme.table_width,
height=column_height,
row_headers=False))
return Paragraph(text=title,
width=self._scheme.table_width,
style={'font-size': 'large'}), elems