bbox-in-meters.py

import utm
from shapely.geometry import Point

def bbox_from_point(point, meters):
    easting, northing, zn, zl = utm.from_latlon(point.y, point.x)
    point = Point(easting, northing)
    bounds = point.buffer(meters).bounds
    minx, miny, maxx, maxy = bounds
    result = []
    for e, n in ((minx, miny), (maxx, maxy)):
        lat, lon = utm.to_latlon(e, n, zn, zl)
        result.append(lon)
        result.append(lat)
    return tuple(result)