Exclude column values which are greater than 033A and small than 033Z from text file

def exclude_values(filename):
  f = open(filename, "r")
  content = f.read()
  f.close()
  content = content.split()
  exclude_values = []
  for value in content:
    if 033A <= value <= 033Z:
      exclude_values.append(value)
  return exclude_values

exclude_values("file.txt")