Prior to 9.17.0 it did not work at all. Since 9.17.0 it sometimes works on the second attempt (depending on the order of registration):
import sys, types
from IPython.core.interactiveshell import InteractiveShell
from IPython.core.magic import Magics, cell_magic, line_magic, magics_class
@magics_class
class LineHalf(Magics):
@line_magic
def dual(self, line):
"""The line half of %dual."""
@magics_class
class CellHalf(Magics):
@cell_magic
def dual(self, line, cell):
"""The cell half of %%dual."""
sys.modules["provider"] = provider = types.ModuleType("provider")
provider.LineHalf, provider.CellHalf = LineHalf, CellHalf
ip = InteractiveShell()
ip.magics_manager.register_lazy("dual", "provider:LineHalf", "line")
ip.magics_manager.register_lazy("dual", "provider:CellHalf", "cell")
ip.run_cell("%%dual?") # does not work "Object `%%dual` not found."
ip.run_cell("%%dual?") # works, shows "Docstring: The cell half of %%dual."If we swap registration order neither works:
import sys, types
from IPython.core.interactiveshell import InteractiveShell
from IPython.core.magic import Magics, cell_magic, line_magic, magics_class
@magics_class
class LineHalf(Magics):
@line_magic
def dual(self, line):
"""The line half of %dual."""
@magics_class
class CellHalf(Magics):
@cell_magic
def dual(self, line, cell):
"""The cell half of %%dual."""
sys.modules["provider"] = provider = types.ModuleType("provider")
provider.LineHalf, provider.CellHalf = LineHalf, CellHalf
ip = InteractiveShell()
ip.magics_manager.register_lazy("dual", "provider:CellHalf", "cell")
ip.magics_manager.register_lazy("dual", "provider:LineHalf", "line")
ip.run_cell("%%dual?") # does not work "Object `%%dual` not found."
ip.run_cell("%%dual?") # does not work "Object `%%dual` not found."Also, there are issues when overwriting built-in dual magic with say only a line magic:
import sys, types
from IPython.core.interactiveshell import InteractiveShell
from IPython.core.magic import Magics, line_magic, magics_class
@magics_class
class MyMagics(Magics):
@line_magic
def time(self, line):
"""My own %time."""
sys.modules["provider"] = provider = types.ModuleType("provider")
provider.MyMagics = MyMagics
ip = InteractiveShell()
ip.magics_manager.register_lazy("time", "provider:MyMagics")
ip.run_cell("time?") # my own %time
ip.run_cell("%%time?") # expected: IPython's %%time docs
ip.run_cell("%%time\npass") # expected: a wall time report
Prior to 9.17.0 it did not work at all. Since 9.17.0 it sometimes works on the second attempt (depending on the order of registration):
If we swap registration order neither works:
Also, there are issues when overwriting built-in dual magic with say only a line magic: