def get_bvalue(self, keyword):
    "Retrieve a requested beam-keyword value\n\n        The method returns the value of the keyword\n        which matches the requested value.\n        If there is no matching keyword, 'None'\n        is returned.\n\n        Parameters\n        ----------\n        keyword: str\n            name of the requested keyword\n\n        Returns\n        -------\n        key: str or None\n            the requested keyword or 'None'\n        "
    rvalue = None
    key = self.get_bkey(keyword)
    if key:
        rvalue = key.keyvalue
    return rvalue
Retrieve a requested beam-keyword value

The method returns the value of the keyword
which matches the requested value.
If there is no matching keyword, 'None'
is returned.

Parameters
----------
keyword: str
    name of the requested keyword

Returns
-------
key: str or None
    the requested keyword or 'None'
def get_bvalue(self, keyword):
    "Retrieve a requested beam-keyword value\n\n        The method returns the value of the keyword\n        which matches the requested value.\n        If there is no matching keyword, 'None'\n        is returned.\n\n        Parameters\n        ----------\n        keyword: str\n            name of the requested keyword\n\n        Returns\n        -------\n        key: str or None\n            the requested keyword or 'None'\n        "
    rvalue = None
    key = self.get_bkey(keyword)
    if key:
        rvalue = key.keyvalue
    return rvalue