diff options
Diffstat (limited to 'day2/session4.tex')
| -rw-r--r-- | day2/session4.tex | 332 |
1 files changed, 163 insertions, 169 deletions
diff --git a/day2/session4.tex b/day2/session4.tex index 4f286c1..f401d8d 100644 --- a/day2/session4.tex +++ b/day2/session4.tex @@ -144,7 +144,7 @@ \begin{frame}[fragile] \frametitle{gcd revisited!} \begin{itemize} - \item Open gcd.py + \item Open \texttt{gcd.py} \end{itemize} \begin{lstlisting} def gcd(a, b): @@ -156,15 +156,15 @@ print gcd(16, 76) \end{lstlisting} \begin{itemize} - \item python gcd.py + \item \texttt{python gcd.py} \end{itemize} \end{frame} \begin{frame}[fragile] \frametitle{Find lcm using our gcd module} \begin{itemize} - \item Open lcm.py - \item $lcm = \frac{a*b}{gcd(a,b)}$ + \item Open \texttt{lcm.py} + \item $lcm = \frac{a * b}{gcd(a,b)}$ \end{itemize} \begin{lstlisting} from gcd import gcd @@ -174,7 +174,7 @@ print lcm(14, 56) \end{lstlisting} \begin{itemize} - \item python lcm.py + \item \texttt{python lcm.py} \end{itemize} \begin{lstlisting} 5 @@ -185,7 +185,7 @@ \begin{frame}[fragile] \frametitle{Writing stand-alone module} -Edit gcd.py file to: +Edit \texttt{gcd.py} file to: \begin{lstlisting} def gcd(a, b): if a % b == 0: @@ -197,22 +197,23 @@ Edit gcd.py file to: print gcd(16, 76) \end{lstlisting} \begin{itemize} - \item python gcd.py - \item python lcm.py + \item \texttt{python gcd.py} + \item \texttt{python lcm.py} \end{itemize} \end{frame} \begin{frame}[fragile] - \frametitle{More use of main} - For automating tests. + \frametitle{Automating tests} \begin{lstlisting} if __name__ == '__main__': for line in open('numbers.txt'): numbers = line.split() x = int(numbers[0]) y = int(numbers[1]) - result = (int(numbers[2])) - assert gcd(x, y) == result + result = int(numbers[2]) + if gcd(x, y) != result: + print "Failed gcd test + for", x, y \end{lstlisting} \end{frame} @@ -242,7 +243,7 @@ if __name__ == '__main__': \frametitle{Code Layout} \begin{itemize} \item Indentation - \item Tabs or Spaces?? + \item Tabs or Spaces? \item Maximum Line Length \item Blank Lines \item Encodings @@ -251,8 +252,8 @@ if __name__ == '__main__': \begin{frame}{Whitespaces in Expressions} \begin{itemize} - \item When to use extraneous whitespaces?? - \item When to avoid extra whitespaces?? + \item When to use extraneous whitespaces? + \item When to avoid extra whitespaces? \item Use one statement per line \end{itemize} \end{frame} @@ -319,43 +320,36 @@ or modulo by zero \end{frame} \begin{frame}[fragile] + \frametitle{Processing user input} + \begin{lstlisting} +prompt = 'Enter a number(Q to quit): ' + +a = raw_input(prompt) + +num = int(a) if a != 'Q' else 0 + \end{lstlisting} + \emphbar{What if the user enters some other alphabet?} +\end{frame} + + +\begin{frame}[fragile] \frametitle{Handling Exceptions} - Python uses \typ{try} and \typ{except} clause. - %%Revisiting the raw\_input + Python provides \typ{try} and \typ{except} clause. \begin{lstlisting} -a = raw_input('Enter number(Q to quit):') +prompt = 'Enter a number(Q to quit): ' + +a = raw_input(prompt) try: num = int(a) print num except: if a == 'Q': - print 'Exiting...' + print "Exiting ..." else: - print 'Wrong input!' - \end{lstlisting} - - + print "Wrong input ..." + \end{lstlisting} \end{frame} -%% \begin{frame}[fragile] -%% \frametitle{Solving it with \typ{try} and \typ{except}} -%% \vspace{-0.2in} -%% \begin{lstlisting} -%% highest = 0 -%% for record in open('sslc1.txt'): -%% fields = record.split(';') -%% try: -%% total = 0 -%% for score_str in fields[3:8]: -%% score = int(score_str) -%% total += score -%% if total > highest: -%% highest = total -%% except: -%% pass -%% print highest -%% \end{lstlisting} -%% \end{frame} \subsection{Strategy} \begin{frame}[fragile] \frametitle{Debugging effectively} @@ -421,6 +415,20 @@ savefig('science.png') \inctime{10} \end{frame} +\begin{frame} + \frametitle{Summary} +We have covered: + \begin{itemize} + \item Following and Resolving Error Messages. + \item Exceptions. + \item Handling exceptions + \item Approach for Debugging. +% \item Writting and running tests. + \end{itemize} +\end{frame} + +\end{document} + %% \begin{frame} %% \frametitle{Testing} @@ -433,130 +441,116 @@ savefig('science.png') %% \end{itemize} %% \end{frame} -\section{Test Driven Approach} -\begin{frame} - \frametitle{Need for Testing!} - - \begin{itemize} - \item Quality - \item Regression - \item Documentation - \end{itemize} - %% \vspace*{0.25in} - %% \emphbar{It is to assure that section of code is working as it is supposed to work} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Example} - \begin{block}{Problem Statement} - Write a function to check whether a given input - string is a palindrome. - \end{block} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Function: palindrome.py} -\begin{lstlisting} -def is_palindrome(input_str): - return input_str == input_str[::-1] -\end{lstlisting} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Test for the palindrome: palindrome.py} -\begin{lstlisting} -def test_function_normal_words(): - input = "noon" - assert is_palindrome(input) == True - -if __name__ == "main'': - test_function_normal_words() -\end{lstlisting} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Running the tests.} -\begin{lstlisting} -$ nosetests palindrome.py -. ----------------------------------------------- -Ran 1 test in 0.001s - -OK -\end{lstlisting} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Exercise: Including new tests.} -\begin{lstlisting} -def test_function_ignore_cases_words(): - input = "Noon" - assert is_palindrome(input) == True -\end{lstlisting} - \vspace*{0.25in} - Check\\ - \PythonCode{$ nosetests palindrome.py} \\ - \begin{block}{Task} - Tweak the code to pass this test. - \end{block} -\end{frame} - -%\begin{frame}[fragile] -% \frametitle{Lets write some test!} -%\begin{lstlisting} -%#for form of equation y=mx+c -%#given m and c for two equation, -%#finding the intersection point. -%def intersect(m1,c1,m2,c2): -% x = (c2-c1)/(m1-m2) -% y = m1*x+c1 -% return (x,y) -%\end{lstlisting} -% -%Create a simple test for this -% -%function which will make it fail. -% -%\inctime{15} -%\end{frame} -% - -%% \begin{frame}[fragile] -%% \frametitle{Exercise} -%% Based on Euclid's algorithm: -%% \begin{center} -%% $gcd(a,b)=gcd(b,b\%a)$ -%% \end{center} -%% gcd function can be written as: -%% \begin{lstlisting} -%% def gcd(a, b): -%% if a%b == 0: return b -%% return gcd(b, a%b) -%% \end{lstlisting} -%% \vspace*{-0.15in} -%% \begin{block}{Task} -%% \begin{itemize} -%% \item Write at least -%% two tests for above mentioned function. -%% \item Write a non recursive implementation -%% of gcd(), and test it using already -%% written tests. -%% \end{itemize} -%% \end{block} - -%% \inctime{15} -%% \end{frame} - -\begin{frame} - \frametitle{Summary} -We have coverd: - \begin{itemize} - \item Following and Resolving Error Messages. - \item Exceptions. - \item Handling exceptions - \item Approach for Debugging. - \item Writting and running tests. - \end{itemize} -\end{frame} - -\end{document} +% \section{Test Driven Approach} +% \begin{frame} +% \frametitle{Need for Testing!} +% +% \begin{itemize} +% \item Quality +% \item Regression +% \item Documentation +% \end{itemize} +% %% \vspace*{0.25in} +% %% \emphbar{It is to assure that section of code is working as it is supposed to work} +% \end{frame} +% +% \begin{frame}[fragile] +% \frametitle{Example} +% \begin{block}{Problem Statement} +% Write a function to check whether a given input +% string is a palindrome. +% \end{block} +% \end{frame} +% +% \begin{frame}[fragile] +% \frametitle{Function: palindrome.py} +% \begin{lstlisting} +% def is_palindrome(input_str): +% return input_str == input_str[::-1] +% \end{lstlisting} +% \end{frame} +% +% \begin{frame}[fragile] +% \frametitle{Test for the palindrome: palindrome.py} +% \begin{lstlisting} +% def test_function_normal_words(): +% input = "noon" +% assert is_palindrome(input) == True +% +% if __name__ == "main'': +% test_function_normal_words() +% \end{lstlisting} +% \end{frame} +% +% \begin{frame}[fragile] +% \frametitle{Running the tests.} +% \begin{lstlisting} +% $ nosetests palindrome.py +% . +% ---------------------------------------------- +% Ran 1 test in 0.001s +% +% OK +% \end{lstlisting} +% \end{frame} +% +% \begin{frame}[fragile] +% \frametitle{Exercise: Including new tests.} +% \begin{lstlisting} +% def test_function_ignore_cases_words(): +% input = "Noon" +% assert is_palindrome(input) == True +% \end{lstlisting} +% \vspace*{0.25in} +% Check\\ +% \PythonCode{$ nosetests palindrome.py} \\ +% \begin{block}{Task} +% Tweak the code to pass this test. +% \end{block} +% \end{frame} +% +% %\begin{frame}[fragile] +% % \frametitle{Lets write some test!} +% %\begin{lstlisting} +% %#for form of equation y=mx+c +% %#given m and c for two equation, +% %#finding the intersection point. +% %def intersect(m1,c1,m2,c2): +% % x = (c2-c1)/(m1-m2) +% % y = m1*x+c1 +% % return (x,y) +% %\end{lstlisting} +% % +% %Create a simple test for this +% % +% %function which will make it fail. +% % +% %\inctime{15} +% %\end{frame} +% % +% +% %% \begin{frame}[fragile] +% %% \frametitle{Exercise} +% %% Based on Euclid's algorithm: +% %% \begin{center} +% %% $gcd(a,b)=gcd(b,b\%a)$ +% %% \end{center} +% %% gcd function can be written as: +% %% \begin{lstlisting} +% %% def gcd(a, b): +% %% if a%b == 0: return b +% %% return gcd(b, a%b) +% %% \end{lstlisting} +% %% \vspace*{-0.15in} +% %% \begin{block}{Task} +% %% \begin{itemize} +% %% \item Write at least +% %% two tests for above mentioned function. +% %% \item Write a non recursive implementation +% %% of gcd(), and test it using already +% %% written tests. +% %% \end{itemize} +% %% \end{block} +% +% %% \inctime{15} +% %% \end{frame}
\ No newline at end of file |