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diff --git a/basic_python/exceptions.tex b/basic_python/exceptions.tex
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-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%Tutorial slides on Python.
-%
-% Author: FOSSEE
-% Copyright (c) 2017, FOSSEE, IIT Bombay
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-\documentclass[14pt,compress]{beamer}
-\input{macros.tex}
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% Title page
-\title[Exceptions]{Python language: exceptions}
-
-\author[FOSSEE Team] {The FOSSEE Group}
-
-\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
-\date[] {Mumbai, India}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% DOCUMENT STARTS
-\begin{document}
-
-\begin{frame}
-  \titlepage
-\end{frame}
-
-\begin{frame}{Motivation}
-    \begin{itemize}
-        \item How do you signal errors to a user?
-    \end{itemize}
-\end{frame}
-
-\begin{frame}
-  \frametitle{Exceptions}
-  \begin{itemize}
-  \item Python's way of notifying you of errors
-  \item Several standard exceptions: \texttt{SyntaxError}, \texttt{IOError}
-    etc.
-  \item Users can also \texttt{raise} errors
-  \item Users can create their own exceptions
-  \item Exceptions can be ``caught'' via \texttt{try/except} blocks
-  \end{itemize}
-\end{frame}
-
-\begin{frame}[fragile]
- \frametitle{Exceptions: examples}
- \begin{lstlisting}
-In []: while True print('Hello world')
- \end{lstlisting}
-\pause
-  \begin{lstlisting}
-File "<stdin>", line 1, in ?
-    while True print('Hello world')
-                   ^
-SyntaxError: invalid syntax
-\end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
- \frametitle{Exceptions: examples}
- \begin{lstlisting}
-In []: print(spam)
-\end{lstlisting}
-\pause
-\begin{lstlisting}
-Traceback (most recent call last):
-  File "<stdin>", line 1, in <module>
-NameError: name 'spam' is not defined
-\end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
- \frametitle{Exceptions: examples}
- \begin{lstlisting}
-In []: 1 / 0
-\end{lstlisting}
-\pause
-\begin{lstlisting}
-Traceback (most recent call last):
-  File "<stdin>", line 1, in <module>
-ZeroDivisionError: integer division
-or modulo by zero
-\end{lstlisting}
-\end{frame}
-
-
-\begin{frame}[fragile]
-  \frametitle{Exceptions: examples}
-\begin{lstlisting}
-In []: '2' + 2
-\end{lstlisting}
-\pause
-\begin{lstlisting}
-Traceback (most recent call last):
-  File "<stdin>", line 1, in ?
-TypeError: cannot concatenate 'str' and 'int' objects
-\end{lstlisting}
-\end{frame}
-
-
-\begin{frame}[fragile]
-  \frametitle{Processing user input}
-  \begin{lstlisting}
-prompt = 'Enter a number(Q to quit): '
-a = 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 provides a \typ{try} and \typ{except} clause.
-  \begin{lstlisting}
-prompt = 'Enter a number(Q to quit): '
-a = input(prompt)
-try:
-    num = int(a)
-    print(num)
-except:
-    if a == 'Q':
-        print("Exiting ...")
-    else:
-        print("Wrong input ...")
-  \end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{Handling Exceptions a little better}
-  Use specific exceptions; avoid blanket except clauses
-  \begin{lstlisting}
-prompt = 'Enter a number(Q to quit): '
-a = input(prompt)
-try:
-    num = int(a)
-    print(num)
-except ValueError:
-    if a == 'Q':
-        print("Exiting ...")
-    else:
-        print("Wrong input ...")
-  \end{lstlisting}
-\end{frame}
-
-
-\begin{frame}[fragile]
-  \frametitle{Exceptions: examples}
-  \small
-\begin{lstlisting}
-prompt = "Enter a number: "
-while True:
-    try:
-        x = int(input(prompt))
-        break
-    except ValueError:
-        print("Invalid input, try again...")
-
-\end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{Catching multiple exceptions}
-  \small
-\begin{lstlisting}
-while True:
-    try:
-        data = input()
-        x = int(data.split(',')[1])
-        break
-    except IndexError:
-        print('Input at least 2 values.')
-    except ValueError:
-        print("Invalid input, try again...")
-
-\end{lstlisting}
-\end{frame}
-
-
-\begin{frame}[fragile]
-  \frametitle{Catching multiple exceptions}
-\begin{lstlisting}
-data = input()
-try:
-    x = int(data.split(',')[1])
-except (ValueError, IndexError):
-    print("Invalid input ...")
-
-\end{lstlisting}
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{\typ{try, except, else}}
-  \small
-\begin{lstlisting}
-while True:
-    try:
-        data = input()
-        x = int(data.split(',')[1])
-    except (ValueError, IndexError):
-        print("Invalid input ...")
-    else:
-        print('All is well!')
-        break
-  \end{lstlisting}
-
-\end{frame}
-
-
-\begin{frame}
-  \frametitle{Some comments}
-  \begin{itemize}
-  \item In practice NEVER use blanket except clauses
-  \item Always catch specific exceptions
-  \end{itemize}
-\end{frame}
-
-\begin{frame}[fragile]
-  \frametitle{Exceptions: raising your exceptions}
-\small
-\begin{lstlisting}
->>> raise ValueError("your error message")
-Traceback (most recent call last):
-  File "<stdin>", line 2, in ?
-ValueError: your error message
-\end{lstlisting}
-\end{frame}
-
-
-
-\begin{frame}[fragile]
-  \frametitle{Exceptions: try/finally}
-  \small
-\begin{lstlisting}
-while True:
-    try:
-        x = int(input(prompt))
-        break
-    except ValueError:
-        print("Invalid number, try again...")
-    finally:
-        print("All good!")
-
-      \end{lstlisting}
-      \normalsize
-      Always runs the finally clause!
-\end{frame}
-
-
-\begin{frame}[fragile]
-  \frametitle{Exceptions: try/finally}
-  \begin{lstlisting}
-def f(x):
-    try:
-        y = int(x)
-        return y
-    except ValueError:
-        print(x)
-    finally:
-        print('finally')
-
->>> f(1)
->>> f('a')
-\end{lstlisting}
-Always runs the finally clause!
-\end{frame}
-
-
-\begin{frame}
-  \frametitle{Summary}
-  \begin{itemize}
-  \item Catching exceptions with \typ{try/except}
-  \item Catching multiple exceptions
-  \item Cleanup with \typ{finally}
-  \item Raising your own exceptions
-  \end{itemize}
-\end{frame}
-
-\begin{frame}
-  \frametitle{What next?}
-  \begin{itemize}
-  \item Only covered the very basics
-  \item More advanced topics remain
-  \item Read the official Python tutorial:
-    \url{docs.python.org/tutorial/}
-  \end{itemize}
-\end{frame}
-
-\end{document}