add urlify.py

Author: osaatcioglu

urlify.py

@@ -0,0 +1,32 @@
+
+def urlify(string, length):
+	i = 0
+	spaces = 0
+	while i < length:
+		if string[i] == " ":
+			spaces = spaces + 1
+		i = i + 1
+	i = length - 1
+	prev_i = length - 1
+	while i >= 0:
+		if string[i] == " ":
+			while i < prev_i:
+				string[prev_i + 2 * spaces] = string[prev_i]
+				prev_i = prev_i - 1
+			string[prev_i + 2 * spaces] = "0"
+			string[prev_i + 2 * spaces - 1] = "2"
+			string[prev_i + 2 * spaces - 2] = "%"
+			spaces = spaces - 1
+			prev_i = i - 1
+		i = i - 1
+	return "".join(a for a in string)
+
+def main():
+	string = "Mr John Smith"
+	length = 13
+	input_string = [a for a in string] + [" " for _ in xrange(4)]
+	url = urlify(input_string, length)
+	print(url)
+
+if __name__ == "__main__":
+	main()