147   \item Open gcd.py

   147   \item Open \texttt{gcd.py}

   159   \item python gcd.py

   159   \item \texttt{python gcd.py}

   166   \item Open lcm.py  

   166   \item Open \texttt{lcm.py}  

   167   \item $lcm = \frac{a*b}{gcd(a,b)}$

   167   \item $lcm = \frac{a * b}{gcd(a,b)}$

   177   \item python lcm.py

   177   \item \texttt{python lcm.py}

   188 Edit gcd.py file to:

   188 Edit \texttt{gcd.py} file to:

   200   \item python gcd.py

   200   \item \texttt{python gcd.py}

   201   \item python lcm.py

   201   \item \texttt{python lcm.py}

   206   \frametitle{More use of main}

   206   \frametitle{Automating tests}

   207   For automating tests.

   214         result = (int(numbers[2]))

   213         result = int(numbers[2])

   215         assert gcd(x, y) == result

   214         if gcd(x, y) != result:

   215             print "Failed gcd test

   216                           for", x, y

   245         \item Tabs or Spaces??

   246         \item Tabs or Spaces?

   254         \item When to use extraneous whitespaces??

   255         \item When to use extraneous whitespaces?

   255         \item When to avoid extra whitespaces??

   256         \item When to avoid extra whitespaces?

   323   Python uses \typ{try} and \typ{except} clause.

   337   Python provides \typ{try} and \typ{except} clause.

   324   %%Revisiting the raw\_input

   326 a = raw_input('Enter number(Q to quit):')

   339 prompt = 'Enter a number(Q to quit): '

   340 

   341 a = raw_input(prompt)

   332         print 'Exiting...'

   347         print "Exiting ..."

   334         print 'Wrong input!'      

   349         print "Wrong input ..."

   335   \end{lstlisting}

   350   \end{lstlisting}  

   336   

   351 \end{frame}

   337   

   352 

   338 \end{frame}

   339 

   340 %% \begin{frame}[fragile]

   341 %%   \frametitle{Solving it with \typ{try} and \typ{except}}

   342 %% \vspace{-0.2in}

   343 %%   \begin{lstlisting}

   344 %% highest = 0

   345 %% for record in open('sslc1.txt'):

   346 %%     fields = record.split(';')

   347 %%     try:

   348 %%         total = 0

   349 %%         for score_str in fields[3:8]:

   350 %%             score = int(score_str)

   351 %%             total += score

   352 %%         if total > highest:

   353 %%             highest = total

   354 %%     except:        

   355 %%         pass

   356 %% print highest

   357 %%   \end{lstlisting}

   358 %% \end{frame}

   436 \section{Test Driven Approach}

   444 % \section{Test Driven Approach}

   437 \begin{frame}

   445 % \begin{frame}

   438     \frametitle{Need for Testing!}

   446 %     \frametitle{Need for Testing!}

   439    

   447 %    

   440     \begin{itemize}

   448 %     \begin{itemize}

   441         \item Quality

   449 %         \item Quality

   442         \item Regression

   450 %         \item Regression

   443         \item Documentation

   451 %         \item Documentation

   444     \end{itemize}

   452 %     \end{itemize}

   445     %% \vspace*{0.25in}

   453 %     %% \vspace*{0.25in}

   446     %% \emphbar{It is to assure that section of code is working as it is supposed to work}

   454 %     %% \emphbar{It is to assure that section of code is working as it is supposed to work}

   447 \end{frame}

   455 % \end{frame}

   448 

   456 % 

   449 \begin{frame}[fragile]

   457 % \begin{frame}[fragile]

   450     \frametitle{Example}

   458 %     \frametitle{Example}

   451     \begin{block}{Problem Statement}

   459 %     \begin{block}{Problem Statement}

   452       Write a function to check whether a given input

   460 %       Write a function to check whether a given input

   453       string is a palindrome.

   461 %       string is a palindrome.

   454     \end{block}

   462 %     \end{block}

   455 \end{frame}

   463 % \end{frame}

   456 

   464 % 

   457 \begin{frame}[fragile]

   465 % \begin{frame}[fragile]

   458     \frametitle{Function: palindrome.py}

   466 %     \frametitle{Function: palindrome.py}

   459 \begin{lstlisting}    

   467 % \begin{lstlisting}    

   460 def is_palindrome(input_str):

   468 % def is_palindrome(input_str):

   461   return input_str == input_str[::-1]

   469 %   return input_str == input_str[::-1]

   462 \end{lstlisting}    

   470 % \end{lstlisting}    

   463 \end{frame}

   471 % \end{frame}

   464 

   472 % 

   465 \begin{frame}[fragile]

   473 % \begin{frame}[fragile]

   466     \frametitle{Test for the palindrome: palindrome.py}

   474 %     \frametitle{Test for the palindrome: palindrome.py}

   467 \begin{lstlisting}    

   475 % \begin{lstlisting}    

   468 def test_function_normal_words():

   476 % def test_function_normal_words():

   469   input = "noon"

   477 %   input = "noon"

   470   assert is_palindrome(input) == True

   478 %   assert is_palindrome(input) == True

   471 

   479 % 

   472 if __name__ == "main'':

   480 % if __name__ == "main'':

   473   test_function_normal_words()

   481 %   test_function_normal_words()

   474 \end{lstlisting}    

   482 % \end{lstlisting}    

   475 \end{frame}

   483 % \end{frame}

   476 

   484 % 

   477 \begin{frame}[fragile]

   485 % \begin{frame}[fragile]

   478     \frametitle{Running the tests.}

   486 %     \frametitle{Running the tests.}

   479 \begin{lstlisting}    

   487 % \begin{lstlisting}    

   480 $ nosetests palindrome.py 

   488 % $ nosetests palindrome.py 

   481 .

   489 % .

   482 ----------------------------------------------

   490 % ----------------------------------------------

   483 Ran 1 test in 0.001s

   491 % Ran 1 test in 0.001s

   484 

   492 % 

   485 OK

   493 % OK

   486 \end{lstlisting}    

   494 % \end{lstlisting}    

   487 \end{frame}

   495 % \end{frame}

   488 

   496 % 

   489 \begin{frame}[fragile]

   497 % \begin{frame}[fragile]

   490     \frametitle{Exercise: Including new tests.}

   498 %     \frametitle{Exercise: Including new tests.}

   491 \begin{lstlisting}    

   499 % \begin{lstlisting}    

   492 def test_function_ignore_cases_words():

   500 % def test_function_ignore_cases_words():

   493   input = "Noon"

   501 %   input = "Noon"

   494   assert is_palindrome(input) == True

   502 %   assert is_palindrome(input) == True

   495 \end{lstlisting}

   503 % \end{lstlisting}

   496      \vspace*{0.25in}

   504 %      \vspace*{0.25in}

   497      Check\\

   505 %      Check\\

   498      \PythonCode{$ nosetests palindrome.py} \\

   506 %      \PythonCode{$ nosetests palindrome.py} \\

   499      \begin{block}{Task}

   507 %      \begin{block}{Task}

   500      Tweak the code to pass this test.

   508 %      Tweak the code to pass this test.

   501      \end{block}

   509 %      \end{block}

   502 \end{frame}

   510 % \end{frame}

   503 

   511 % 

   504 %\begin{frame}[fragile]

   512 % %\begin{frame}[fragile]

   505 %    \frametitle{Lets write some test!}

   513 % %    \frametitle{Lets write some test!}

   506 %\begin{lstlisting}    

   514 % %\begin{lstlisting}    

   507 %#for form of equation y=mx+c

   515 % %#for form of equation y=mx+c

   508 %#given m and c for two equation,

   516 % %#given m and c for two equation,

   509 %#finding the intersection point.

   517 % %#finding the intersection point.

   510 %def intersect(m1,c1,m2,c2):

   518 % %def intersect(m1,c1,m2,c2):

   511 %    x = (c2-c1)/(m1-m2)

   519 % %    x = (c2-c1)/(m1-m2)

   512 %    y = m1*x+c1

   520 % %    y = m1*x+c1

   513 %    return (x,y)

   521 % %    return (x,y)

   514 %\end{lstlisting}

   522 % %\end{lstlisting}

   515 %

   523 % %

   516 %Create a simple test for this

   524 % %Create a simple test for this

   517 %

   525 % %

   518 %function which will make it fail.

   526 % %function which will make it fail.

   519 %

   527 % %

   520 %\inctime{15} 

   528 % %\inctime{15} 

   521 %\end{frame}

   529 % %\end{frame}

   522 %

   530 % %

   523 

   531 % 

   524 %% \begin{frame}[fragile]

   532 % %% \begin{frame}[fragile]

   525 %%     \frametitle{Exercise}

   533 % %%     \frametitle{Exercise}

   526 %%     Based on Euclid's algorithm:

   534 % %%     Based on Euclid's algorithm:

   527 %%     \begin{center}

   535 % %%     \begin{center}

   528 %%     $gcd(a,b)=gcd(b,b\%a)$

   536 % %%     $gcd(a,b)=gcd(b,b\%a)$

   529 %%     \end{center}

   537 % %%     \end{center}

   530 %%     gcd function can be written as:

   538 % %%     gcd function can be written as:

   531 %%     \begin{lstlisting}

   539 % %%     \begin{lstlisting}

   532 %%     def gcd(a, b):

   540 % %%     def gcd(a, b):

   533 %%       if a%b == 0: return b

   541 % %%       if a%b == 0: return b

   534 %%       return gcd(b, a%b)

   542 % %%       return gcd(b, a%b)

   535 %%     \end{lstlisting}

   543 % %%     \end{lstlisting}

   536 %%     \vspace*{-0.15in}

   544 % %%     \vspace*{-0.15in}

   537 %%     \begin{block}{Task}

   545 % %%     \begin{block}{Task}

   538 %%       \begin{itemize}

   546 % %%       \begin{itemize}

   539 %%       \item Write at least 

   547 % %%       \item Write at least 

   540 %%         two tests for above mentioned function.

   548 % %%         two tests for above mentioned function.

   541 %%       \item Write a non recursive implementation

   549 % %%       \item Write a non recursive implementation

   542 %%       of gcd(), and test it using already 

   550 % %%       of gcd(), and test it using already 

   543 %%       written tests.

   551 % %%       written tests.

   544 %%       \end{itemize}

   552 % %%       \end{itemize}

   545 %%     \end{block}

   553 % %%     \end{block}

   546     

   554 %     

   547 %% \inctime{15} 

   555 % %% \inctime{15} 

   548 %% \end{frame}

   556 % %% \end{frame}

   549 

   550 \begin{frame}

   551   \frametitle{Summary}

   552 We have coverd:

   553   \begin{itemize}

   554   \item Following and Resolving Error Messages.

   555   \item Exceptions.

   556   \item Handling exceptions

   557   \item Approach for Debugging.

   558   \item Writting and running tests.

   559   \end{itemize}

   560 \end{frame}

   561 

   562 \end{document}