Replaced str.format() with f-strings in Python code.

python/qrcodegen-demo.py

@@ -180,14 +180,14 @@ def to_svg_str(qr: QrCode, border: int) -> str:
 	for y in range(qr.get_size()):
 		for x in range(qr.get_size()):
 			if qr.get_module(x, y):
-				parts.append("M{},{}h1v1h-1z".format(x + border, y + border))
-	return """<?xml version="1.0" encoding="UTF-8"?>
+				parts.append(f"M{x+border},{y+border}h1v1h-1z")
+	return f"""<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 {0} {0}" stroke="none">
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 {qr.get_size()+border*2} {qr.get_size()+border*2}" stroke="none">
 	<rect width="100%" height="100%" fill="#FFFFFF"/>
-	<path d="{1}" fill="#000000"/>
+	<path d="{" ".join(parts)}" fill="#000000"/>
 </svg>
-""".format(qr.get_size() + border * 2, " ".join(parts))
+"""
 
 
 def print_qr(qrcode: QrCode) -> None:

python/qrcodegen.py

@@ -93,7 +93,7 @@ class QrCode:
 			if version >= maxversion:  # All versions in the range could not fit the given data
 				msg: str = "Segment too long"
 				if datausedbits is not None:
-					msg = "Data length = {} bits, Max capacity = {} bits".format(datausedbits, datacapacitybits)
+					msg = f"Data length = {datausedbits} bits, Max capacity = {datacapacitybits} bits"
 				raise DataTooLongError(msg)
 		assert datausedbits is not None