Module refinery.units.meta.rmv

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from __future__ import annotations

from refinery.lib.meta import metavars
from refinery.lib.types import Param
from refinery.units import Arg, Chunk, Unit


class rmv(Unit):
    """
    Remove meta variables from the current frame.

    Short for "ReMove Variable": Removes meta variables that were created in the current
    frame. If no variable names are given, the unit removes all of them. Note that this can
    recover variables from outer frames that were previously shadowed.
    """
    def __init__(self, *names: Param[str, Arg.String(metavar='name', help='Name of a variable to be removed.')]):
        super().__init__(names=names)

    def process(self, data: Chunk):
        meta = metavars(data)
        keys = self.args.names or list(meta.variable_names())
        for key in keys:
            meta.discard(key)
        return data

Classes

class rmv (*names)

Remove meta variables from the current frame.

Short for "ReMove Variable": Removes meta variables that were created in the current frame. If no variable names are given, the unit removes all of them. Note that this can recover variables from outer frames that were previously shadowed.

Expand source code Browse git 
class rmv(Unit):
    """
    Remove meta variables from the current frame.

    Short for "ReMove Variable": Removes meta variables that were created in the current
    frame. If no variable names are given, the unit removes all of them. Note that this can
    recover variables from outer frames that were previously shadowed.
    """
    def __init__(self, *names: Param[str, Arg.String(metavar='name', help='Name of a variable to be removed.')]):
        super().__init__(names=names)

    def process(self, data: Chunk):
        meta = metavars(data)
        keys = self.args.names or list(meta.variable_names())
        for key in keys:
            meta.discard(key)
        return data

Ancestors

Subclasses

Class variables

var reverse

The type of the None singleton.

Inherited members