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control.config._process_param — Python Control Systems Library 0.10.2 documentation

control.config._process_param(name, defval, kwargs, alias_mapping, sigval=None)[source]

Process named parameter, checking aliases and legacy usage.

Helper function to process function arguments by mapping aliases to either their default keywords or to a named argument. The alias mapping is a dictionary that returns a tuple consisting of valid aliases and legacy aliases:

alias_mapping = {
     'argument_name_1': (['alias', ...], ['legacy', ...]),
     ...}

If param is a named keyword in the function signature with default value defval, a typical calling sequence at the start of a function is:

param = _process_param('param', defval, kwargs, function_aliases)

If param is a variable keyword argument (in kwargs), defval can be passed as either None or the default value to use if param is not present in kwargs.

Parameters:

namestr

Name of the parameter to be checked.

defvalobject or dict

Default value for the parameter.

kwargsdict

Dictionary of variable keyword arguments.

alias_mappingdict

Dictionary providing aliases and legacy names.

sigvalobject, optional

Default value specified in the function signature (default = None). If specified, an error will be generated if defval is different than sigval and an alias or legacy keyword is given.

Returns:

newvalobject

New value of the named parameter.

Raises:

TypeError

If multiple keyword aliases are used for the same parameter.

Warns:

PendingDeprecationWarning

If legacy name is used to set the value for the variable.

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