May 15th, 2016
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1. '''
3. by Mark Wu
4.
5. Format: Ull000
6.
7. Here's two different solutions to this question,
8. using either Built-in functions or Regular Expression
9. '''
10.
12. '''
13. UserID <-- ''
15. INPUT UserID
16. IF LENGTH(UserID) = 6 THEN
17.    IF LEFT(UserID, 1) = UCASE(LEFT(UserID, 1)) AND
18.       MID(UserID, 2, 2) = LCASE(MID(UserID, 2, 2)) AND
19.       (ASC(RIGHT(UserID, 1)) >= 48 AND ASC(RIGHT(UserID, 1)) <= 57) AND
20.       (ASC(MID(UserID, 4, 1)) >= 48 AND ASC(MID(UserID, 4, 1)) <= 57) AND
21.       (ASC(MID(UserID, 5, 1)) >= 48 AND ASC(MID(UserID, 5, 1)) <= 57)
22.    THEN
23.        OUTPUT "Correct Format"
24.    ELSE
25.        OUTPUT "Wrong Format"
26. ELSE
27.    OUTPUT "Wrong Format"
28. '''
29.
31. # Solution 1 (using Built-in function)
33. user_input = input("Please input user ID?")
34.
35. while True:
36.     if len(user_input) != 6:
37.         print("Invalid ID. It should have a length of 6")
38.         user_input = input("Please input user ID?")
39.     else:
40.         break
41.
42. # Validation
43. if user_input[0].isupper() and user_input[1:3].islower() and user_input[3:].isnumeric():
44.     print("True. The input ID (%s) is valid." % user_input)
45. else:
46.     print("False. The input ID (%s) is invalid." % user_input)
47.
48. # # Solution 2 (using RE)
49. # import re
50. # user_input = input("Please input user ID?")
51. #
52. # myRex = re.compile(r'^[A-Z][a-z]{2}\d\d\d\$')
53. #
54. # mo = myRex.search(user_input)
55. #
56. # if mo == None:
57. #     print("False. The input ID (%s) is invalid." % user_input)
58. # else:
59. #     print("True. The input ID (%s) is valid." % user_input)
60.
63. # Solution 1 (using Built-in function)
64. user_input = input("Please input user ID?")
65.
66. while True:
67.     if len(user_input) != 6:
68.         print("Invalid ID. It should have a length of 6")
69.         user_input = input("Please input user ID?")
70.     else:
71.         break
72.
73. # Validation
74. if user_input[:3].isalpha() and user_input[3:].isnumeric():
75.     print("True. The input ID (%s) is valid." % user_input)
76. else:
77.     print("False. The input ID (%s) is invalid." % user_input)
78.
79. # # Solution 2 (using RE)
80. # import re
81. # user_input = input("Please input user ID?")
82. #
83. # myRex = re.compile(r'^[A-Za-z]{3}\d\d\d\$')
84. #
85. # mo = myRex.search(user_input)
86. #
87. # if mo == None:
88. #     print("False. The input ID (%s) is invalid." % user_input)
89. # else:
90. #     print("True. The input ID (%s) is valid." % user_input)
91.
94. # Solution 1 ONLY (using Built-in function)
95. user_input = input("Please input user ID?")
96.
97. while True:
98.     if len(user_input) != 6:
99.         print("Invalid ID. It should have a length of 6")
100.         user_input = input("Please input user ID?")
101.     else:
102.         break
103.
104.
105. # Validation Function
106. def ValidateuserID(instring):
107.     if instring[:3].isalpha() and instring[3:].isnumeric():
108.         return True
109.     else:
110.         return False
111.
112.
113. print("The validity of ID: " + str(ValidateuserID(user_input)))
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