Add new file

Author: arshadumrethi

Diff for: card.py

@@ -0,0 +1,37 @@
+
+##This script takes in a sequence and determines what kind of credit card it belongs to.
+#Amex cards begin with 34 or 37 and contain 15 digits
+#Discover cards begin with 6011, 16 digits
+#Mastercard begins with 51/52/53/54/55, 16 digits
+#Visa begins with 4, 13 or 16 digits
+
+def get_issuer(number):
+    card = str(number)
+    nums = len(card)
+
+    if card[:2] in ("34", "37") and nums == 15:
+        return "AMEX"
+    elif card[:4] == "6011" and nums == 16:
+        return "Discover"
+    elif 51 <= int(card[:2]) <= 55 and nums == 16:
+        return "Mastercard"
+    elif card[0] == "4" and nums in (13, 16):
+        return "VISA"
+    return "Unknown"
+
+get_issuer(4111111111111111)
+
+#First attempt didnt pass all test cases.
+# def get_issuer(number):
+#     string_num = str(number)
+#     if len(string_num) == 15:
+#         print "AMEX"
+#
+#     elif string_num[:4] == 6011:
+#         print "Discover"
+#
+#     elif string_num[:2] in range(50, 56):
+#         print "Mastercard"
+#
+#     elif string_num[0] == 4: #and len(string_num) == 16:
+#         print "VISA"