Workshop materials: comparison day1/session2.tex

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-:d3aae4b05e99
+:8905a5badd7e
 }
 \newcounter{time}
 \setcounter{time}{0}
 \newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
-\newcommand{\typ}[1]{\texttt{#1}}
+\newcommand{\typ}[1]{\lstinline{#1}}
 \newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
 %%% This is from Fernando's setup.
 % \usepackage{color}
 % }
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Title page
-\title[Basic Python]{Python:Basic Overview\\}
+\title[Basic Python]{Basic Overview\\}
 \author[FOSEE Team] {The FOSSEE Group}
 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
 \date[] {31, October 2009\\Day 1, Session 2}
 \end{frame}
 \begin{frame}[fragile]
 \frametitle{Functions: Example 1}
 \begin{lstlisting}
-In [1]: def plot_sinx():
+In []: def plot_sinx():
 ....:     x = linspace(0, 2*pi, 100)
 ....:     plt.plot(x, sin(x))
 ....:     plt.show()
 ....:
-In [2]: plot_sinx()
+In []: plot_sinx()
 \end{lstlisting}
 \end{frame}
 \begin{frame}[fragile]
 \frametitle{Functions: Example 2}
 \begin{lstlisting}
-In [3]: def f(x):
+In []: def f(x):
 ....:     return sin(x*x*x)+(3*x*x)
-In [4]: x = linspace(0,2*pi, 1000)
+In []: x = linspace(0,2*pi, 1000)
-In [5]: plt.plot(x, f(x))
+In []: plt.plot(x, f(x))
 \end{lstlisting}
 \inctime{10}
 \end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 {Creating python files}
 \begin{itemize}
 \item aka scripts
 \item use your editor
 \item extension \typ{.py}
-\item run with \texttt{python hello.py} at the command line
+\item run with \typ{python hello.py} at the command line
 \item in IPython using \kwrd{\%run}
 \end{itemize}
 \inctime{5}
 \end{frame}
 \section{Files Handling}
 \begin{frame}[fragile]
 \frametitle{Basic File Operations}
 Opening and Reading files
-\begin{lstlisting}
+\begin{small}
-In [6]: f = open('/path/to/file_name')
+\begin{lstlisting}
-In [7]: data = f.read() # Read entire file.
+In []: f = open('hello.py')
-In [8]: line = f.readline() # Read one line.
+In []: data = f.read() # Read entire file.
-In [9]: f.close() # close the file.
+In []: line = f.readline() # Read 1 line.
-\end{lstlisting}
+In []: f.close() # close the file.
+\end{lstlisting}
+\end{small}
 Writing files
 \begin{lstlisting}
-In [10]: f = open('/path/to/file_name', 'w')
+In []: f = open('hello.txt', 'w')
-In [11]: f.write('hello world\n')
+In []: f.write('hello world\n')
-In [12]: f.close()
+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 [13]: f = open('dummyfile')
+In []: f = open('dummyfile')
-In [14]: for line in f:
+In []: for line in f:
 ...:     print line
 ...:
 \end{lstlisting}
 \inctime{10}
 \end{frame}
 \end{lstlisting}
 \end{frame}
 \begin{frame}[fragile]\frametitle{Strings and \typ{split()}}
 \begin{lstlisting}
-In [15]: a = 'hello world'
+In []: a = 'hello world'
-In [16]: a.split()
+In []: a.split()
-Out[17]: ['hello', 'world']
+Out[]: ['hello', 'world']
 \end{lstlisting}
 Now try this:
 \begin{lstlisting}
-In [18]: b = 'KD, Madhu, Punchagan, Shantanu, Vattam'
+In []: b = 'KD, MCS, PC, SC, SV'
-In [19]: b.split(',')
+In []: b.split(',')
-Out[20]: ['KD', ' Madhu', ' Punchagan', ' Shantanu', ' Vattam']
+Out[]: ['KD', 'MCS', 'PC', 'SC', 'SV']
 \end{lstlisting}
 \inctime{5}
 \end{frame}
 \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 [21]: plt.plot(x, sin(x), 'ro')
+In []: plt.plot(x, sin(x), 'ro')
-Out[22]: [<matplotlib.lines.Line2D object at 0xac17e0c>]
+Out[]: [<matplotlib.lines.Line2D object at 0xac17e0c>]
 \end{lstlisting}
 \begin{itemize}
 \item \kwrd{'r'},\kwrd{'g'},\kwrd{'b'} for red, green and blue
 \item \kwrd{'o'} - Dots
 \item \kwrd{'-'} - Lines
 \section{Lists}
 \begin{frame}[fragile]
 \frametitle{List creation and indexing}
 \begin{lstlisting}
-In [23]: lst = [] #Empty list
+In []: lst = [] #Empty list
-In [24]: lst = [1,2,3,4] #More useful list
+In []: lst = [1,2,3,4]
+#More useful list
-In [25]: len(lst)
-Out[26]: 4
+In []: len(lst)
+Out[]: 4
-In [27]: lst[0]+lst[1]+lst[-1]
-Out[27]: 7
+In []: lst[0]+lst[1]+lst[-1]
+Out[]: 7
 \end{lstlisting}
 \begin{itemize}
 \item Indices start with ?
 \item Negative indices indicate ?
 \end{itemize}
 \item Slicing is a basic operation
 \item \typ{list[initial:final:step]}
 \item  The step is optional
 \end{itemize}
 \begin{lstlisting}
-In [28]: lst[1:3]  # A slice.
+In []: lst[1:3]  # A slice.
-Out[28]: [2, 3]
+Out[]: [2, 3]
-In [29]: lst[1:-1]
+In []: lst[1:-1]
-Out[29]: [2, 3]
+Out[]: [2, 3]
-In [30]: lst[1:] == lst[1:-1]
+In []: lst[1:] == lst[1:-1]
-Out[30]: False
+Out[]: False
 \end{lstlisting}
 Explain last result
 \end{frame}
 \begin{frame}[fragile]
 \frametitle{List: more slices}
 \begin{lstlisting}
-In [31]: lst[0:-1:2] # Notice the step!
+In []: lst[0:-1:2] # Notice the step!
-Out[31]: [1, 3]
+Out[]: [1, 3]
-In [31]: lst[::2]
+In []: lst[::2]
-Out[31]: [1, 3]
+Out[]: [1, 3]
-In [32]: lst[-1::-1]
+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 [33]: lst.append(5)
+In []: lst.append(5)
+In []: lst
-In [34]: lst
+Out[]: [1, 2, 3, 4, 5]
-Out[34]: [1, 2, 3, 4, 5]
+In []: lst.append([6,7])
-In [35]: lst.append([6,7])
+In []: lst
+Out[]: [1, 2, 3, 4, 5, [6, 7]]
-In [36]: lst
-Out[36]: [1, 2, 3, 4, 5, [6, 7]]
+In []: lst.extend([8,9])
+In []: lst
-In [37]: lst.extend([8,9])
+Out[]: [1, 2, 3, 4, 5, [6, 7], 8, 9]
-In [38]: lst
-Out[38]: [1, 2, 3, 4, 5, [6, 7], 8, 9]
 \end{lstlisting}
 \end{frame}
 \begin{frame}[fragile]
 \frametitle{List containership}
 \begin{lstlisting}
-In [39]: animals = ['cat', 'dog', 'rat', 'croc']
+In []: animals = ['cat', 'dog', 'rat', 'croc']
-In [40]: 'dog' in animals
+In []: 'dog' in animals
-Out[40]: True
+Out[]: True
-In [41]: 'snake' in animals
+In []: 'snake' in animals
-Out[41]: False
+Out[]: False
 \end{lstlisting}
 \inctime{10}
 \end{frame}
 \section{Modules and import}

changeset 130	8905a5badd7e
parent 118	c7f85ba59af3
child 132	c10d8cb8d690