new_contents: 
  import csv
  from numpy import sqrt
  
  # Midpoint for Key Bridge
  x1 = 38.892233
  y1 = -77.059403
  
  # Threshold marker 
  x2 = 38.892066
  y2 = -77.065711
  
  
  radius_squared = (x2 - x1)**2 + (y2 - y1)**2
  radius = sqrt(radius_squared)
  
  data_file = open("IncidentData_24OCT14.csv", "rU")
  data = csv.DictReader(data_file)
  
  results = []
  
  for row in data:
  	lat = float(row["Latitude"])
  	lon = float(row["Longitude"])
  
  	distance_squared = ((lat) - x1)**2 + ((lon) - y1)**2
  	distance = sqrt(distance_squared)
  
  	if distance <= radius:
  		results.append({"Location": row["Location"], "Type": row["Standardized Type"], 
  			"Start Time": row["Time Opened"], "Duration": row["Duration"], 
  			"Latitude": row["Latitude"], "Longitude": row["Longitude"]})
  
  f = open('roosevelt66bridge.csv','wb')
  w = csv.DictWriter(f, fieldnames = ["Location", "Type", "Start Time", "Duration", "Latitude", "Longitude"])
  w.writeheader()
  w.writerows(results)	
  
  
  
  
  
subject: Create rooseveltbdrigeradius.py