13 .. 1. getting started with ipython

    13 .. 1. getting started with ipython

    14 .. #. getting started with lists

    14 .. #. getting started with lists

    15 .. #. getting started with for

    15 .. #. getting started with for

    16      

    16      

    17 .. Author              : Puneeth

    17 .. Author              : Puneeth

    19    External Reviewer   :

    19    External Reviewer   :

    20    Checklist OK?       : <put date stamp here, if OK> [2010-10-05]

    20    Checklist OK?       : <put date stamp here, if OK> [2010-10-05]

    21 

    21 

    22 Script

    22 Script

    23 ------

    23 ------

    75 

    75 

    76   pend

    76   pend

    77 

    77 

    78 Following is an exercise that you must do. 

    78 Following is an exercise that you must do. 

    79 

    79 

    80 %%1%% Split the variable into a list, ``pend_list``, of the lines in

    82 %%1%% Split the variable into a list, ``pend_list``, of the lines in

    81 the file. Hint, use the tab command to see what methods the string

    83 the file. Hint, use the tab command to see what methods the string

    82 variable has.

    84 variable has.

    83 

    85 

    84 Please, pause the video here. Do the exercise and then continue. 

    86 Please, pause the video here. Do the exercise and then continue. 

    85 

    87 

    86 .. #[punch: should this even be put? add dependency to strings LO,

    88 .. #[punch: should this even be put? add dependency to strings LO,

    87 .. where we mention that strings have methods for manipulation. hint:

    89 .. where we mention that strings have methods for manipulation. hint:

    88 .. use splitlines()]

    90 .. use splitlines()]

    89 

    91 

    90 ::

    97 ::

    91 

    98 

    92   pend_list = pend.splitlines()

    99   pend_list = pend.splitlines()

    93 

   100 

    94   pend_list

   101   pend_list

    97 will have to close the file, since the file has already been read till

   104 will have to close the file, since the file has already been read till

    98 the end.

   105 the end.

    99 

   106 

   100 .. #[punch: should we mention file-pointer?]

   107 .. #[punch: should we mention file-pointer?]

   101 

   108 

   102 Let us close the file opened into f.

   113 Let us close the file opened into f.

   103 ::

   114 ::

   104 

   115 

   105   f.close()

   116   f.close()

   106 

   117 

   136       print line

   147       print line

   137 

   148 

   138 As we already know, ``line`` is just a dummy variable, and not a

   149 As we already know, ``line`` is just a dummy variable, and not a

   139 keyword. We could have used any other variable name, but ``line``

   150 keyword. We could have used any other variable name, but ``line``

   140 seems meaningful enough.

   151 seems meaningful enough.

   141 

   155 

   142 Instead of just printing the lines, let us append them to a list,

   156 Instead of just printing the lines, let us append them to a list,

   143 ``line_list``. We first initialize an empty list, ``line_list``. 

   157 ``line_list``. We first initialize an empty list, ``line_list``. 

   144 ::

   158 ::

   145 

   159 

   165 Notice that ``line_list`` is a list of the lines in the file, along

   179 Notice that ``line_list`` is a list of the lines in the file, along

   166 with the newline characters. If you noticed, ``pend_list`` did not

   180 with the newline characters. If you noticed, ``pend_list`` did not

   167 contain the newline characters, because the string ``pend`` was

   181 contain the newline characters, because the string ``pend`` was

   168 split on the newline characters. 

   182 split on the newline characters. 

   169 

   183 

   170 {{{ show the summary slide }}}

   193 {{{ show the summary slide }}}

   171 

   194 

   172 That brings us to the end of this tutorial. In this tutorial we

   195 That brings us to the end of this tutorial. In this tutorial we

   173 have learnt to open and close files, read the data in the files as

   196 have learnt to open and close files, read the data in the files as

   174 a whole, using the read command or reading it line by line by

   197 a whole, using the read command or reading it line by line by