diff --git a/examples/plot_state_border/main.py b/examples/plot_state_border/main.py
index ab36804bd92..8b4433e237c 100644
--- a/examples/plot_state_border/main.py
+++ b/examples/plot_state_border/main.py
@@ -12,37 +12,37 @@
 import overpass
 
 MAX_SIZE = 400
-XML_FILE = 'state_border_saxony.xml'
+XML_FILE = "state_border_saxony.xml"
 QUERY = """area[name="Sachsen"][type="boundary"]->.saxony;
 	rel(area.saxony)[admin_level=4][type="boundary"][boundary="administrative"];
 	out geom;"""
 
 # the query is can be quite big (multiple MB) so we save the servers response in a file
 # that can be re-opened the next time
-if not(os.path.isfile(XML_FILE)):
-	# increase timeout because the response can be pretty heavy
-	api = overpass.API(timeout=60)
+if not (os.path.isfile(XML_FILE)):
+    # increase timeout because the response can be pretty heavy
+    api = overpass.API(timeout=60)
 
-	response = api.get(QUERY, responseformat="xml")
+    response = api.get(QUERY, responseformat="xml")
 
-	# write xml file
-	f = open(XML_FILE, 'w')
-	# encode response in UTF-8 because name translation contain non-ascii characters
-	f.write(response.encode('utf-8'))
-	f.close()
+    # write xml file
+    f = open(XML_FILE, "w")
+    # encode response in UTF-8 because name translation contain non-ascii characters
+    f.write(response.encode("utf-8"))
+    f.close()
 
-	# free up memory
-	#del response
+    # free up memory
+    # del response
 
 # open xml file
 root = xml.etree.ElementTree.parse(XML_FILE).getroot()
 
 # bounds element contains information of the width and height
-bounds = root.find('relation').find('bounds')
-min_lat = float(bounds.get('minlat'))
-min_lon = float(bounds.get('minlon'))
-max_lat = float(bounds.get('maxlat'))
-max_lon = float(bounds.get('maxlon'))
+bounds = root.find("relation").find("bounds")
+min_lat = float(bounds.get("minlat"))
+min_lon = float(bounds.get("minlon"))
+max_lat = float(bounds.get("maxlat"))
+max_lon = float(bounds.get("maxlon"))
 
 # longitude: east - west (x)
 # latitude: north - south (y)
@@ -53,50 +53,51 @@
 scale_x = int(MAX_SIZE * box_width / max(box_width, box_height))
 scale_y = int(MAX_SIZE * box_height / max(box_width, box_height))
 
+
 def outside(x1, y1, x2, y2, tolerance):
-	# check if distance between two points is bigger than the given tolerance
-	# since tolerance is a constant it doesn't have to be squared
-	dx = x1 - x2
-	dy = y1 - y2
-	return (dx*dx + dy*dy) > tolerance
+    # check if distance between two points is bigger than the given tolerance
+    # since tolerance is a constant it doesn't have to be squared
+    dx = x1 - x2
+    dy = y1 - y2
+    return (dx * dx + dy * dy) > tolerance
 
 
 point_count = 0
 # look through all `member` nodes
-for member in root.iter('member'):
-	m_type, m_role = member.get('type'), member.get('role')
-
-	# check if the element belongs to the outer border
-	if m_type == 'way' and m_role == 'outer':
-		# `nd` elements contain lon and lat coordinates
-		m_points = member.findall('nd')
-
-		prev_x, prev_y = -1, -1
-
-		index = 0
-		for mp in m_points:
-			x, y = float(mp.get('lon')), float(mp.get('lat'))
-
-			# convert lon and lat coordinates to pixel coordinates
-			x = (x - min_lon) / box_width * scale_x
-			y = (y - min_lat) / box_height * scale_y
-
-			if index == 0:
-				# first point
-				prev_x = x
-				prev_y = y
-			elif outside(x, y, prev_x, prev_y, 1) or index == len(m_points) - 1:
-				# check if points are not too close to each other (too much detail) or if it's the last point of the section
-				# if the last point was ignored, there would be holes
-
-				# draw line from current point to previous point
-				plt.plot([x, prev_x], [y, prev_y], 'k-')
-				point_count += 1
-				# save coordinates
-				prev_x = x
-				prev_y = y
-
-			index += 1
+for member in root.iter("member"):
+    m_type, m_role = member.get("type"), member.get("role")
+
+    # check if the element belongs to the outer border
+    if m_type == "way" and m_role == "outer":
+        # `nd` elements contain lon and lat coordinates
+        m_points = member.findall("nd")
+
+        prev_x, prev_y = -1, -1
+
+        index = 0
+        for mp in m_points:
+            x, y = float(mp.get("lon")), float(mp.get("lat"))
+
+            # convert lon and lat coordinates to pixel coordinates
+            x = (x - min_lon) / box_width * scale_x
+            y = (y - min_lat) / box_height * scale_y
+
+            if index == 0:
+                # first point
+                prev_x = x
+                prev_y = y
+            elif outside(x, y, prev_x, prev_y, 1) or index == len(m_points) - 1:
+                # check if points are not too close to each other (too much detail) or if it's the last point of the section
+                # if the last point was ignored, there would be holes
+
+                # draw line from current point to previous point
+                plt.plot([x, prev_x], [y, prev_y], "k-")
+                point_count += 1
+                # save coordinates
+                prev_x = x
+                prev_y = y
+
+            index += 1
 
 print(point_count)
 # show plot
diff --git a/overpass/utils.py b/overpass/utils.py
index 0fcfebcf437..0b276e00bc5 100644
--- a/overpass/utils.py
+++ b/overpass/utils.py
@@ -1,5 +1,4 @@
 class Utils(object):
-
     @staticmethod
     def to_overpass_id(osmid, area=False):
         area_base = 2400000000