„README.md“ ändern

README.md

@@ -1,5 +1,3 @@
 # palindrome
 
-Run script with `./palindrome.py -i 123`
-
-Test the script with `./test_palindrome.py`
+Just run it with `python palindrome.py -i 10000` for example

palindrome.py

@@ -12,25 +12,22 @@ def parse_args():
                                                   'transform it into a'
                                                   'palindrome'))
     parser.add_argument('-i',
-                        '--integer',
+                        '--int',
                         required=True,
                         help='The integer to be transformed.',
                         type=int)
     # NOTE: The argument must be an integer. Because of this constrain integers
-    # with leading zeroes will be stripped automatically in python 3. Also the
-    # script only allows integers as an input defined by type=int
+    # with leading zeroes will be stripped automatically in python 3.
     args = parser.parse_args()
     return args
 
 
 def main():
     args = parse_args()
-    if args.integer <= 10000 and args.integer > 0:
-        print('Input integer is: {}'.format(args.integer))
+    if args.int <= 10000 and args.int > 0:
+        print('Input integer is: {}'.format(args.int))
         transform = Transform()
-        palindrome = transform.palindrome(args.integer)
-        if palindrome == transform.INVALID_RETURN_VALUE:
-            print('Palindrome to be calculated is to big. Abort!')
+        palindrome = transform.palindrome(args.int)
         print("Final Output is:", palindrome)
         return palindrome
     else:

test_palindrome.py

@@ -1,49 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-import unittest
-from transform.Transform import Transform
-
-
-class TestPalindrome(unittest.TestCase):
-    """Test the palindrome script."""
-    PALINDROME_MAIN_TEST_CASES = [{'input': 28, 'output': 121},
-                                  {'input': 51, 'output': 66},
-                                  {'input': 11, 'output': 11},
-                                  {'input': 607, 'output': 4444},
-                                  {'input': 196, 'output': -1}]
-
-    IS_PALIDNROME_TEST_CASES = [{'input': 11, 'output': True},
-                                {'input': 112, 'output': False},
-                                {'input': 2222, 'output': True},
-                                {'input': 0, 'output': True},
-                                {'input': 1234321, 'output': True}]
-
-    REVERSED_TAST_CASES = [{'input': 123, 'output': 321},
-                           {'input': 4321, 'output': 1234}]
-
-    def setUp(self):
-        pass
-
-    def test_palindrome_main(self):
-        transform = Transform()
-        for test_case in self.PALINDROME_MAIN_TEST_CASES:
-            self.assertEqual(transform.palindrome(test_case['input']),
-                             test_case['output'])
-
-    def test_is_palindrome(self):
-        transform = Transform()
-        for test_case in self.IS_PALIDNROME_TEST_CASES:
-            # set input_integer for class manually to run this test
-            transform.input_integer = test_case['input']
-            self.assertEqual(transform._Transform__is_palindrome(test_case['input']),  # noqa
-                             test_case['output'])
-
-    def test__reverese_int(self):
-        transform = Transform()
-        for test_case in self.REVERSED_TAST_CASES:
-            self.assertEqual(transform._Transform__reverese_int(test_case['input']),  # noqa
-                             test_case['output'])
-
-
-if __name__ == '__main__':
-    unittest.main()

transform/Transform.py

@@ -2,57 +2,56 @@
 # -*- coding: utf-8 -*-
 class Transform(object):
     """Class to transform a given integer into a palindrome"""
-    # to avoid magic numbers.
-    MAXIMUM_INPUT_VALUE = 1000000000
-    INVALID_RETURN_VALUE = -1
 
     def __init__(self):
         super(Transform, self).__init__()
 
-    def palindrome(self, integer):
+    def palindrome(self, int):
         '''
-        The main function. Checks if input integer is already a palindrome
-        and trys calculating one if input integer is not already a palindrome.
+        Kind of the main function. Checks if input int is already a palindrome
+        and trys calculation one if input integer is not already a palindrome.
         '''
-        self.input_integer = integer
-        if self.__is_palindrome(self.input_integer):
-            print('Integer {} is a palindrome'.format(self.input_integer))
-            return self.input_integer
+        self.input_int = int
+        if self.__is_palindrome(self.input_int):
+            print('Integer {} is a palindrome'.format(self.input_int))
+            return self.input_int
         else:
-            print('Integer {} is not a palindrome'.format(self.input_integer))
-            print('Calculating the palindrome for input {}'.format(self.input_integer))  # noqa
+            print('Integer {} is not a palindrome'.format(self.input_int))
+            print('Calculating the palindrome for input {}'.format(self.input_int))
             palindrome = self.__calculate_palindrome()
             return palindrome
 
     # The following methods are private. Signaled by the leading __
     def __is_palindrome(self, int_to_check):
-        reversed_integer = self.__reverese_int(int_to_check)
-        if self.input_integer == reversed_integer:
+        reversed = self.__reverese_int(int_to_check)
+        if self.input_int == reversed:
             return True
         else:
             return False
 
     def __reverese_int(self, int_to_reverse):
-        reversed_integer = 0
+        reversed = 0
         int_to_check = int_to_reverse
         while int_to_check > 0:
             reminder = int_to_check % 10
-            reversed_integer = (reversed_integer * 10) + reminder
+            reversed = (reversed * 10) + reminder
             int_to_check = int_to_check // 10
-        return reversed_integer
+        return reversed
 
     def __calculate_palindrome(self):
-        reversed_integer = self.__reverese_int(self.input_integer)
-        self.input_integer = self.input_integer + reversed_integer
-        print('Possible palindrome is {}'.format(self.input_integer))
-        if self.__is_palindrome(self.input_integer) is True:
-            print('Possible palindrome is correct!')
-            return self.input_integer
-        elif not self.__is_palindrome(self.input_integer):
-            print('Possible palindrome is wrong! Calcualte again!')
-            while not self.__is_palindrome(self.input_integer):
-                if self.input_integer >= self.MAXIMUM_INPUT_VALUE:
-                    return self.INVALID_RETURN_VALUE
-                else:
-                    self.__calculate_palindrome()
-            return self.input_integer
+        reversed = self.__reverese_int(self.input_int)
+        self.input_int = self.input_int + reversed
+        print('Possible palindrome is {}'.format(self.input_int))
+
+        if self.__is_palindrome(self.input_int) is True:
+            return self.input_int
+
+        if self.__is_palindrome(self.input_int) is False:
+            return self.__try_again()
+
+    def __try_again(self):
+        while self.input_int <= 1000000000:
+            self.__calculate_palindrome()
+            if self.input_int >= 1000000000:
+                print('Palindrome to be calculated is to big. Abort!')
+        return -1