title: converting coordinates given in list of tuples to complex number
body: <p>I have written the following code for calculating the closest pair in a plane. The code works fine but I have two questions. First, is there a shorter/better way to convert the representation of points from tuples to complex in the first function? and second, is the way I have passed the first function to the second function correct?</p>
  
  <pre><code>import sys
  
  x = [1, 4]
  y = [1, 5]
  
  
  def to_complex(hor, ver):
      list_of_points = list(zip(hor, ver))
      list_of_points.sort(key=lambda el: (el[0], el[1]))
      complex_points = [complex(item[0], item[1]) for item in list_of_points]
      return complex_points
  
  
  # Brute force algorithm.
  
  
  def brute_force(points=to_complex(x, y)):
      n = len(points)
      if n &lt; 2:
          return sys.maxsize
      else:
          min_distance = sys.maxsize
          for i in range(n):
              for j in range(i + 1, n):
                  if abs(points[i] - points[j]) &lt; min_distance:
                      min_distance = abs(points[i] - points[j])
                      closest_pair = (points[i], points[j])
  
  return min_distance, closest_pair
  
  
  print(brute_force())
  </code></pre>