manipulating-strings/slides.org
author bhanu
Thu, 11 Nov 2010 02:28:55 +0530
changeset 457 68813d8d80fb
parent 286 44f06ae0d957
permissions -rw-r--r--
Merging Heads
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
286
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     1
#+LaTeX_CLASS: beamer
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     2
#+LaTeX_CLASS_OPTIONS: [presentation]
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     3
#+BEAMER_FRAME_LEVEL: 1
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     4
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     5
#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     6
#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     7
#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     8
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     9
#+LaTeX_CLASS: beamer
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    10
#+LaTeX_CLASS_OPTIONS: [presentation]
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    11
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    12
#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    13
#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    14
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    15
#+LaTeX_HEADER: \usepackage{listings}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    16
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    17
#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    18
#+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    19
#+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    20
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    21
#+TITLE:    Manipulating strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    22
#+AUTHOR:    FOSSEE
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    23
#+EMAIL:     
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    24
#+DATE:    
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    25
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    26
#+DESCRIPTION: 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    27
#+KEYWORDS: 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    28
#+LANGUAGE:  en
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    29
#+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    30
#+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    31
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    32
* Outline
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    33
  - Slicing strings to get sub-strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    34
  - Reversing strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    35
  - Replacing characters in strings. 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    36
  - Converting strings to upper or lower case
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    37
  - Joining a list of strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    38
* Question 1
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    39
  Obtain the sub-string excluding the first and last characters from
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    40
  the string ~s~.
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    41
* Solution 1
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    42
  #+begin_src python
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    43
    In []:  s[1:-1]
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    44
  #+end_src
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    45
* Question 2
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    46
  Given a list week, week = ~week = ["sun", "mon", "tue", "wed",
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    47
  "thu", "fri", "sat"]~. Check if ~s~ is a valid name of a day of the
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    48
  week. Change the solution to this problem, to include forms like,
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    49
  SAT, SATURDAY, Saturday and Sat.
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    50
* Solution 2
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    51
  #+begin_src python
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    52
    In []:  s in week
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    53
    In []:  s.lower()[:3] in week
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    54
  #+end_src
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    55
* Question 3
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    56
  Given ~email~ -- ~info@fossee[dot]in~
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    57
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    58
  Replace the ~[dot]~ with ~.~ in ~email~
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    59
* Solution 3
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    60
  #+begin_src python
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    61
    email.replace('[dot], '.')
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    62
    print email
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    63
  #+end_src
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    64
* Question 4
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    65
  From the ~email_str~ that we generated, change the separator to be a
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    66
  semicolon instead of a comma.
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    67
* Solution 4
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    68
  #+begin_src python
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    69
    email_str = email_str.replace(",", ";")
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    70
  #+end_src
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    71
* Summary
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    72
  You should now be able to --
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    73
  - Slice strings and get sub-strings out of them
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    74
  - Reverse strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    75
  - Replace characters in strings. 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    76
  - Convert strings to upper or lower case
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    77
  - Join a list of strings
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    78
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    79
* Thank you!
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    80
#+begin_latex
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    81
  \begin{block}{}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    82
  \begin{center}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    83
  This spoken tutorial has been produced by the
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    84
  \textcolor{blue}{FOSSEE} team, which is funded by the 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    85
  \end{center}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    86
  \begin{center}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    87
    \textcolor{blue}{National Mission on Education through \\
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    88
      Information \& Communication Technology \\ 
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    89
      MHRD, Govt. of India}.
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    90
  \end{center}  
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    91
  \end{block}
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    92
#+end_latex
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    93
44f06ae0d957 Slides for manipulating strings LO.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    94