<human>:  lines that start with exactly 7 spaces are treated as comments.
<bot>: Here is a Python function to line that starts with exactly 7 spaces and are treated as comments

import re

def seven_spaces_comment(line):
  """Lines that start with exactly 7 spaces are treated as comments."""
  return line.startswith(''* 7)

# Enter the line
line = "This is a line with 7 spaces"

# Calling the function
print((seven_spaces_comment(line)))

#Example Output
# True

#Remember to inspect code for bugs.