lsst.pipe.base.argumentParser.ConfigValueAction Class Reference

argparse action callback to override config parameters using name=value pairs from the command line More...

Inheritance diagram for lsst.pipe.base.argumentParser.ConfigValueAction:

Public Member Functions
def	__call__
	Override one or more config name value pairs. More...

Detailed Description

argparse action callback to override config parameters using name=value pairs from the command line

Definition at line 602 of file argumentParser.py.

Member Function Documentation

def lsst.pipe.base.argumentParser.ConfigValueAction.__call__	(		self,
			parser,
			namespace,
			values,
			option_string
	)

Override one or more config name value pairs.

Parameters

[in]	parser	argument parser (instance of ArgumentParser)
[in,out]	namespace	parsed command (an instance of argparse.Namespace); updated values: namespace.config
[in]	values	a list of configItemName=value pairs
[in]	option_string	option value specified by the user (a str)

Definition at line 605 of file argumentParser.py.

    def __call__(self, parser, namespace, values, option_string):
        """!Override one or more config name value pairs

        @param[in] parser           argument parser (instance of ArgumentParser)
        @param[in,out] namespace    parsed command (an instance of argparse.Namespace);
            updated values:
            - namespace.config
        @param[in] values           a list of configItemName=value pairs
        @param[in] option_string    option value specified by the user (a str)
        """
        if namespace.config is None:
            return
        for nameValue in values:
            name, sep, valueStr = nameValue.partition("=")
            if not valueStr:
                parser.error("%s value %s must be in form name=value" % (option_string, nameValue))

            # see if setting the string value works; if not, try eval
            try:
                setDottedAttr(namespace.config, name, valueStr)
            except AttributeError:
                parser.error("no config field: %s" % (name,))
            except Exception:
                try:
                    value = eval(valueStr, {})
                except Exception:
                    parser.error("cannot parse %r as a value for %s" % (valueStr, name))
                try:
                    setDottedAttr(namespace.config, name, value)
                except Exception, e:
                    parser.error("cannot set config.%s=%r: %s" % (name, value, e))