def myfun(a, b): """ >>> myfun(2,3) 5 >>> myfun(4,3) 7 """ return a+b if __name__ == '__main__': import doctest doctest.testmod()

## Thursday, April 25, 2013

### Doctest in python

The doctest module searches for pieces of text that look like interactive Python sessions in docstrings, and then executes those sessions to verify that they work exactly as shown.
If test failed it will shows proper message.

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Abu Zahed Jony
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1:51 AM
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### Python unittest

Unittest is included in the Python standard library. It is very easy to use. Here I write two function named

**myfun**,**reverse**and then unsing**MyTest**function I tested those two functions. Let's check.import unittest def myfun(a, b): return a+b def reverse(A): i = 0 j = len(A)-1 while i<j: A[i], A[j] = A[j], A[i] i = i + 1 j = j -1 class MyTest(unittest.TestCase): def test(self): self.assertEqual(myfun(2, 3), 5) self.assertEqual(myfun(4, 3), 7) # test reverse(A) A = [1, 2, 3] expected = [3, 2, 1] reverse(A) self.assertEqual(A, expected) if __name__ == '__main__': unittest.main(exit=False)

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Abu Zahed Jony
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1:03 AM
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## Wednesday, April 24, 2013

### Bubble sort in python

Bubble sort python code.

def bubble_sort(A): n = len(A) for i in range(0,n): for j in range (i+1,n): if A[i]>A[j]: A[i],A[j]=A[j], A[i] if __name__=="__main__": A = [7,3,5,2] print A bubble_sort(A) print A

**Output:**[7, 3, 5, 2] [2, 3, 5, 7]

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Abu Zahed Jony
at
5:10 AM
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### Selection sort in python

Selection sort python code.

def get_index_of_smallest(A, i): index_of_smallest = i for j in range(i+1, len(A)): if A[index_of_smallest]>A[j]: index_of_smallest = j; return index_of_smallest def selection_sort(A): for i in range (0, len(A)): index_of_smallest = get_index_of_smallest(A,i) A[index_of_smallest], A[i] = A[i], A[index_of_smallest] if __name__=="__main__": A = [7,3,5,2] print A selection_sort(A) print A

**Output:**[7, 3, 5, 2] [2, 3, 5, 7]

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Abu Zahed Jony
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5:06 AM
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### Insertion sort in python

Insertion sort python code.

def insert(A,i): value = A[i] j = i while j != 0 and A[j-1]>value: A[j] = A[j-1] j = j - 1 A[j] = value def insertion_sort(A): for i in range(len(A)): insert(A, i) if __name__=="__main__": A = [7,3,5,2] print A insertion_sort(A) print A

**Output:**[7, 3, 5, 2] [2, 3, 5, 7]

Posted by
Abu Zahed Jony
at
5:02 AM
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