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76 \title[Basic Python]{Python language: Data structures and functions} |
76 \title[Basic Python]{Python language: Data structures and functions} |
77 |
77 |
78 \author[FOSSEE Team] {The FOSSEE Group} |
78 \author[FOSSEE Team] {The FOSSEE Group} |
79 |
79 |
80 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay} |
80 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay} |
81 \date[] {12 January, 2010\\Day 2, Session 2} |
81 \date[] {13 February, 2010\\Day 3, Session 1} |
82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
83 |
83 |
84 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo} |
84 %\pgfdeclareimage[height=0.75cm]{iitmlogo}{iitmlogo} |
85 %\logo{\pgfuseimage{iitmlogo}} |
85 %\logo{\pgfuseimage{iitmlogo}} |
86 |
86 |
206 \item If the number is even, divide by 2; if the number is odd, multiply by 3 and add 1. |
206 \item If the number is even, divide by 2; if the number is odd, multiply by 3 and add 1. |
207 \item Repeat the procedure with the new number. |
207 \item Repeat the procedure with the new number. |
208 \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops. |
208 \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops. |
209 \end{enumerate} |
209 \end{enumerate} |
210 Write a program that accepts the starting value and prints out the Collatz sequence. |
210 Write a program that accepts the starting value and prints out the Collatz sequence. |
211 \end{frame} |
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212 |
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213 \begin{frame}[fragile]{Problem 1.3} |
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214 Write a program that prints the following pyramid on the screen. |
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215 \begin{lstlisting} |
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216 1 |
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217 2 2 |
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218 3 3 3 |
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219 4 4 4 4 |
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220 \end{lstlisting} |
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221 The number of lines must be obtained from the user.\\ |
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222 \pause |
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223 \emphbar{When can your code fail?} |
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224 \inctime{5} |
211 \inctime{5} |
225 \end{frame} |
212 \end{frame} |
226 |
213 |
227 \section{Data structures} |
214 \section{Data structures} |
228 \subsection{Lists} |
215 \subsection{Lists} |
516 while i * i < n: |
503 while i * i < n: |
517 i += 1 |
504 i += 1 |
518 return i * i == n, i |
505 return i * i == n, i |
519 \end{lstlisting} |
506 \end{lstlisting} |
520 \end{frame} |
507 \end{frame} |
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508 |
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509 \begin{frame}[fragile] |
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510 \frametitle {What does this function do?} |
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511 \begin{lstlisting} |
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512 def what( x, n ): |
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513 if n < 0: |
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514 n = -n |
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515 x = 1.0 / x |
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516 |
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517 z = 1.0 |
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518 while n > 0: |
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519 if n % 2 == 1: |
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520 z *= x |
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521 x *= x |
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522 n /= 2 |
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523 return z |
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524 \end{lstlisting} |
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525 \end{frame} |
521 |
526 |
522 \begin{frame} |
527 \begin{frame} |
523 \frametitle{What did we learn?} |
528 \frametitle{What did we learn?} |
524 \begin{itemize} |
529 \begin{itemize} |
525 \item Loops: \kwrd{while}, \kwrd{for} |
530 \item Loops: \kwrd{while}, \kwrd{for} |