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"""Set package-wide default parameters and IPython/Jupyter display format."""
__all_ = ['DEFAULT_SOURCE_EXTENSION',
'set_default_engine', 'set_default_format', 'set_jupyter_format']
DEFAULT_SOURCE_EXTENSION = 'gv'
def set_default_engine(engine: str) -> str:
"""Change the default ``engine`` and return the old default value.
Args:
engine: new default ``engine``
used by all present and newly created instances
without explicitly set ``engine``
(``'dot'``, ``'neato'``, ...).
Returns:
The old default value used for ``engine``.
"""
from . import parameters
parameters.verify_engine(engine)
old_default_engine = parameters.Parameters._engine
parameters.Parameters._engine = engine
return old_default_engine
def set_default_format(format: str) -> str:
"""Change the default ``format`` and return the old default value.
Args:
format: new default ``format``
used by all present and newly created instances
without explicitly set ``format``
(``'pdf'``, ``'png'``, ...).
Returns:
The old default value used for ``format``.
"""
from . import parameters
parameters.verify_format(format)
old_default_format = parameters.Parameters._format
parameters.Parameters._format = format
return old_default_format
def set_jupyter_format(jupyter_format: str) -> str:
"""Change the default mimetype format for ``_repr_mimebundle_()`` and return the old value.
Args:
jupyter_format: new default IPython/Jupyter display format
used by all present and newly created instances
(``'svg'``, ``'png'``, ...).
Returns:
The old default value used for IPython/Jupyter display format.
"""
from . import jupyter_integration
mimetype = jupyter_integration.get_jupyter_format_mimetype(jupyter_format)
old_mimetype = jupyter_integration.JupyterIntegration._jupyter_mimetype
old_format = jupyter_integration.get_jupyter_mimetype_format(old_mimetype)
jupyter_integration.JupyterIntegration._jupyter_mimetype = mimetype
return old_format
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