import re
should_match = r'.\asdf\fdsa'
shouldnt_match = r'potatos'
print(re.match(r'^\.\\', should_match))
print(re.match(r'^\.\\', shouldnt_match))
print(re.match(".\\.*", should_match))
print(re.match(".\\.*", shouldnt_match))
aW1wb3J0IHJlCgpzaG91bGRfbWF0Y2ggPSByJy5cYXNkZlxmZHNhJwpzaG91bGRudF9tYXRjaCA9IHIncG90YXRvcycKCnByaW50KHJlLm1hdGNoKHInXlwuXFwnLCBzaG91bGRfbWF0Y2gpKQpwcmludChyZS5tYXRjaChyJ15cLlxcJywgc2hvdWxkbnRfbWF0Y2gpKQoKcHJpbnQocmUubWF0Y2goIi5cXC4qIiwgc2hvdWxkX21hdGNoKSkKcHJpbnQocmUubWF0Y2goIi5cXC4qIiwgc2hvdWxkbnRfbWF0Y2gpKQ==