save png or tif file of a given lattitude and longitude using google earth engine and wrtie command to sace it to python api write full working code

import ee
ee.Initialize()

def function(lat, lon):
  point = ee.Geometry.Point(lon, lat)
  collection = ee.ImageCollection('LANDSAT/LC08/C01/T1_TOA')
  image = collection.filterBounds(point).sort('DATE', False).mosaic().clip(point)
  url = image.getDownloadURL({
      'name': 'image',
      'scale': 30,
      'crs': 'EPSG:4326',
      'region': point.getInfo()['coordinates']
  })
  return url
  
function(1, 2)