--- a/day1/session2.tex	Thu Oct 15 23:10:03 2009 +0530
+++ b/day1/session2.tex	Tue Oct 20 14:41:15 2009 +0530
@@ -164,10 +164,8 @@
 \begin{frame}
   {Creating python files}
   \begin{itemize}
-    \item aka scripts
     \item use your editor
     \item extension \typ{.py}
-    \item run with \typ{python hello.py} at the command line
     \item in IPython using \kwrd{\%run}
   \end{itemize}
 \inctime{5}
@@ -175,28 +173,6 @@
 
 \section{Files Handling}
 \begin{frame}[fragile]
-  \frametitle{Basic File Operations}
-Opening and Reading files
-\begin{small}
-\begin{lstlisting}
-In []: f = open('hello.py')
-In []: data = f.read() # Read entire file.
-In []: line = f.readline() # Read 1 line.
-In []: f.close() # close the file.
-\end{lstlisting}
-\end{small}
-Writing files
-\begin{lstlisting}
-In []: f = open('hello.txt', 'w')
-In []: f.write('hello world\n')
-In []: f.close()
-\end{lstlisting}
-\begin{itemize}
-    \item Everything read or written is a string
-\end{itemize}
-\end{frame}
-
-\begin{frame}[fragile]
     \frametitle{File and \kwrd{for}}
 \begin{lstlisting}
 In []: f = open('dummyfile')
@@ -205,23 +181,12 @@
     ...:     print line
     ...:  
 \end{lstlisting}
-\inctime{10}
+\inctime{5}
 \end{frame}
 
 \section{Strings}
-\begin{frame}[fragile]
-  \frametitle{Strings}
-  \begin{lstlisting}
-s = 'this is a string'
-s = 'This one has "quotes" inside!'
-s = "I have 'single-quotes' inside!"
-l = "A string spanning many lines\
-one more line\
-yet another"
-t = """A triple quoted string does
-not need to be escaped at the end and 
-"can have nested quotes" etc."""
-  \end{lstlisting}
+\begin{frame}{Strings}
+Anything within ``quotes'' is a string!
 \end{frame}
 
 \begin{frame}[fragile]\frametitle{Strings and \typ{split()}}
@@ -244,7 +209,6 @@
 \section{Plotting points}
 \begin{frame}[fragile]
 \frametitle{How to plot points?}
-We saw how to plot graphs, lets now look at how to plot points.\\
 \begin{lstlisting}
 In []: plt.plot(x, sin(x), 'ro')
 Out[]: [<matplotlib.lines.Line2D object at 0xac17e0c>]
@@ -263,13 +227,7 @@
 \begin{frame}[fragile]
   \frametitle{List creation and indexing}
 \begin{lstlisting}
-In []: lst = [] #Empty list
-
 In []: lst = [1,2,3,4] 
-#More useful list
-
-In []: len(lst)
-Out[]: 4
 
 In []: lst[0]+lst[1]+lst[-1]
 Out[]: 7
@@ -282,67 +240,24 @@
 
 \begin{frame}[fragile]
   \frametitle{List: slices}
-  \begin{itemize}
-  \item Slicing is a basic operation
-  \item \typ{list[initial:final:step]}
-  \item  The step is optional
-  \end{itemize}
+  \typ{list[initial:final:step]}
 \begin{lstlisting}
 In []: lst[1:3]  # A slice.
 Out[]: [2, 3]
 
 In []: lst[1:-1]
 Out[]: [2, 3]
-
-In []: lst[1:] == lst[1:-1]
-Out[]: False
 \end{lstlisting}
-Explain last result
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{List: more slices}
-\begin{lstlisting}
-In []: lst[0:-1:2] # Notice the step!
-Out[]: [1, 3]
-
-In []: lst[::2]
-Out[]: [1, 3]
-
-In []: lst[-1::-1]
-\end{lstlisting}
-What do you think the last one will do?
 \end{frame}
 
 \begin{frame}[fragile]
   \frametitle{List methods}
 \begin{lstlisting}
-In []: lst.append(5)
-In []: lst
-Out[]: [1, 2, 3, 4, 5]
-
 In []: lst.append([6,7])
 In []: lst
 Out[]: [1, 2, 3, 4, 5, [6, 7]]
-
-In []: lst.extend([8,9])
-In []: lst
-Out[]: [1, 2, 3, 4, 5, [6, 7], 8, 9]
 \end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{List containership}
-  \begin{lstlisting}
-In []: animals = ['cat', 'dog', 'rat', 'croc']
-
-In []: 'dog' in animals
-Out[]: True
-
-In []: 'snake' in animals
-Out[]: False
-  \end{lstlisting}
-  \inctime{10}
+\inctime{10}
 \end{frame}
 
 \section{Modules and import}