--- a/day2/session4.tex Tue Nov 10 12:21:29 2009 +0530
+++ b/day2/session4.tex Tue Nov 10 16:26:47 2009 +0530
@@ -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 @@
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 @@
\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 @@
\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 @@
\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 @@
\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 @@
%% \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