Changes made during REC Chennai workshop.

4 files changed, 159 insertions, 11 deletions

diff --git a/day2/cheatsheet3.tex b/day2/cheatsheet3.tex
index 03da579..97cd2ed 100644
--- a/day2/cheatsheet3.tex
+++ b/day2/cheatsheet3.tex
@@ -105,7 +105,7 @@ bye bye vattam
 \section{Self contained python script}
 Functions like \typ{plot}, \typ{linspace} etc are not inbuilt functions. One have to import them to use them.
   \begin{lstlisting}
-from pylab import linspace, pi, sin
+from scipy import linspace, pi, sin
 from pylab import plot, legend, annotate
 from pylab import xlim, ylim
 
diff --git a/day2/day2quiz.tex b/day2/day2quiz.tex
index badefbc..5561d3d 100755
--- a/day2/day2quiz.tex
+++ b/day2/day2quiz.tex
@@ -60,5 +60,127 @@ On the top right hand corner please write down the following:
   \end{itemize}
 \end{frame}
 
+\begin{frame}
+\frametitle{\incqno }
+  What is the largest integer value that can be represented natively by Python?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+  What is the result of 17.0 / 2?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+  Which of the following is not a type in Python?
+  \begin{enumerate}
+    \item int
+    \item float
+    \item char
+    \item string
+  \end{enumerate}
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+How do you create a complex number with real part 2 and imaginary part
+0.5.
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+  What is the difference between \kwrd{print} \emph{x} and \kwrd{print} \emph{x,} ?
+\end{frame}
+
+\begin{frame}
+\frametitle{\incqno }
+  What does '*' * 40 produce?
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{\incqno }
+    What is the output of:
+    \begin{lstlisting}
+In []: ', '.join(['a', 'b', 'c'])
+    \end{lstlisting}
+\end{frame}
+
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: 47 % 3 
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}
+    \frametitle{\incqno}
+  How do you find the presence of an element \emph{x} in the list \emph{a}?
+\end{frame}
+
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: set([1, 2, 8, 2, 13, 8, 9])
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: a = {'a': 1, 'b': 2} 
+In []: a['a'] = 10
+pIn []: print a
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: for i in range(3, 10, 2):
+  ...:     print i
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: a = [1, 2, 3] 
+In []: a.extend([5, 6])
+  \end{lstlisting}
+  What is the value of a?
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+In []: a = (1, 2, 3)
+In []: a[1] = 10
+  \end{lstlisting}
+  What is the result?
+\end{frame}
+
+\begin{frame}[fragile]
+    \frametitle{\incqno}
+  \begin{lstlisting}
+def func(x, y=10):
+    print x+1, y+10
+
+func(1)
+
+  \end{lstlisting}
+  What is the output?
+\end{frame}
+
+\begin{frame}
+    \frametitle{\incqno}
+  How many items can a function return?
+\end{frame}
+
 \end{document}
 
diff --git a/day2/session3.tex b/day2/session3.tex
index 8e08271..8b2a12f 100644
--- a/day2/session3.tex
+++ b/day2/session3.tex
@@ -250,6 +250,23 @@ NameError: name 'linspace' is not defined
 \begin{frame}[fragile]
   \frametitle{Remedy \ldots}
   \begin{lstlisting}
+from scipy import *
+  \end{lstlisting}
+\alert{Now run python four\_plot.py again}
+\end{frame}
+
+\begin{frame}[fragile]
+  \begin{lstlisting}
+Traceback (most recent call last):
+  File "four_plot.py", line 1, in <module>
+    x = plot(x, x, 'b')
+NameError: name 'plot' is not defined
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Remedy \ldots}
+  \begin{lstlisting}
 from pylab import *
   \end{lstlisting}
 \alert{Now run python four\_plot.py again!!}
@@ -261,8 +278,8 @@ from pylab import *
     \item The \kwrd{import} keyword ``loads'' a module
     \item One can also use:
       \begin{lstlisting}
-In []: from pylab import *
-In []: from pylab import linspace
+In []: from scipy import *
+In []: from scipy import linspace
       \end{lstlisting}    
     \item What is the difference?
     \item \alert{Use the former only in interactive mode}
@@ -282,7 +299,7 @@ from scipy.optimize import fsolve
   \frametitle{\texttt{from} \ldots \texttt{import} - conventional way!}
   \small
   \begin{lstlisting}
-from pylab import linspace, pi, sin
+from scipy import linspace, pi, sin
 from pylab import plot, legend, annotate
 from pylab import xlim, ylim
 
@@ -302,17 +319,18 @@ ylim(-5*pi, 5*pi)
   \frametitle{\texttt{from} \ldots \texttt{import} - conventional way!}
   \small
   \begin{lstlisting}
+import scipy
 import pylab
 
-x = pylab.linspace(-5*pylab.pi, 5*pylab.pi, 500)
+x = scipy.linspace(-5*scipy.pi, 5*scipy.pi, 500)
 pylab.plot(x, x, 'b')
 pylab.plot(x, -x, 'b')
-pylab.plot(x, pylab.sin(x), 'g', linewidth=2)
-pylab.plot(x, x*pylab.sin(x), 'r', linewidth=3)
+pylab.plot(x, scipy.sin(x), 'g', linewidth=2)
+pylab.plot(x, x*scipy.sin(x), 'r', linewidth=3)
 pylab.legend(['x', '-x', 'sin(x)', 'xsin(x)'])
 pylab.annotate('origin', xy = (0, 0))
-pylab.xlim(-5*pylab.pi, 5*pylab.pi)
-pylab.ylim(-5*pylab.pi, 5*pylab.pi)
+pylab.xlim(-5*scipy.pi, 5*scipy.pi)
+pylab.ylim(-5*scipy.pi, 5*scipy.pi)
   \end{lstlisting}
 \end{frame}
 
diff --git a/day2/session5.tex b/day2/session5.tex
index c5809c5..abbd2af 100644
--- a/day2/session5.tex
+++ b/day2/session5.tex
@@ -138,9 +138,17 @@ aliquot(12) = 1 + 2 + 3 + 4 + 6 = 16.\\
 \inctime{10}
 \end{frame}
 
-\begin{frame} 
+
+\begin{frame}
   \frametitle{Problem 3}
-  Count frequencies of words in a file.
+Given a list of words, find all the anagrams in the list.
+Solve the problem without using dictionaries.
+
+\end{frame}
+
+\begin{frame} 
+  \frametitle{Problem 4}
+  Count frequencies of words in a file named 'holmes.txt'.
 \inctime{25}
 \end{frame}