old_contents: import os
  import json
  import numpy as np
  
  SAMPLES = 1201 # Change this to 3601 for SRTM1
  HGTDIR = 'hgt' # All 'hgt' files will be kept here uncompressed
  
  def get_elevation(lon, lat):
      file = get_file_name(lon, lat)
      if file:
          return read_elevation_from_file(file, lon, lat)
      # Treat it as data void as in SRTM documentation
      # if file is absent
      return -32768
  
  
  def read_elevation_from_file(file, lon, lat):
      with open(file) as hgt_data:
          # HGT is 16bit signed integer(i2) - big endian(>)
          elevations = np.fromfile(hgt_data, np.dtype('>i2'), SAMPLES*SAMPLES)
                                  .reshape((SAMPLES, SAMPLES))
          
          lat_row = round((lat - int(lat))* 1200, 0)
          lon_row = round((lon - int(lon))* 1200, 0)
          
          return elevations[1200-lat_row, lon_row].astype(int)
  
  def get_file_name(lon, lat):
      '''
      Returns filename such as N27E086.hgt, concatenated
      with HGTDIR where these 'hgt' files are kept 
      '''
      file = "N%(lat)dE0%(lon)d.hgt" % {'lat':lat, 'lon':lon}
      file = os.path.join(HGTDIR, file)
      if os.path.isfile(file):
          return file
      else:
          return None
  
  
  if __name__ == '__main__':
      # Mt. Everest
      print get_elevation(86.925278, 27.988056)
      # Kanchanjunga
      print get_elevation(88.146667, 27.7025)
          
          
  
  
  
new_contents: import os
  import json
  import numpy as np
  
  SAMPLES = 1201 # Change this to 3601 for SRTM1
  HGTDIR = 'hgt' # All 'hgt' files will be kept here uncompressed
  
  def get_elevation(lon, lat):
      file = get_file_name(lon, lat)
      if file:
          return read_elevation_from_file(file, lon, lat)
      # Treat it as data void as in SRTM documentation
      # if file is absent
      return -32768
  
  
  def read_elevation_from_file(file, lon, lat):
      with open(file) as hgt_data:
          # HGT is 16bit signed integer(i2) - big endian(>)
          elevations = np.fromfile(hgt_data, np.dtype('>i2'), SAMPLES*SAMPLES)\
                                  .reshape((SAMPLES, SAMPLES))
          
          lat_row = round((lat - int(lat))* 1200, 0)
          lon_row = round((lon - int(lon))* 1200, 0)
          
          return elevations[1200-lat_row, lon_row].astype(int)
  
  def get_file_name(lon, lat):
      '''
      Returns filename such as N27E086.hgt, concatenated
      with HGTDIR where these 'hgt' files are kept 
      '''
      file = "N%(lat)dE0%(lon)d.hgt" % {'lat':lat, 'lon':lon}
      file = os.path.join(HGTDIR, file)
      if os.path.isfile(file):
          return file
      else:
          return None
  
  
  if __name__ == '__main__':
      # Mt. Everest
      print get_elevation(86.925278, 27.988056)
      # Kanchanjunga
      print get_elevation(88.146667, 27.7025)
          
          
  
  
  
subject: Fix to prevent indentation error.