'Initialize a customized Bing geocoder with location-specific
address information and your Bing Maps API key.
``api_key`` should be a valid Bing Maps API key.
``format_string`` is a string containing \'%s\' where the string to
geocode should be interpolated before querying the geocoder.
For example: \'%s, Mountain View, CA\'. The default is just \'%s\'.
``output_format`` (DEPRECATED) is ignored'

def __init__(self, api_key, format_string='%s', output_format=None):

    if (output_format != None):
        from warnings import warn
        warn(('geopy.geocoders.bing.Bing:    The    `output_format`    parameter    is    deprecated    ' + 'and    ignored.'), DeprecationWarning)
    self.api_key = api_key
    self.format_string = format_string
    self.url = 'http://dev.virtualearth.net/REST/v1/Locations?%s'
