| 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 2 | <html> |
| 3 | <head> |
| 4 | <link rel="STYLESHEET" href="lib.css" type='text/css' /> |
| 5 | <link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" /> |
| 6 | <link rel='start' href='../index.html' title='Python Documentation Index' /> |
| 7 | <link rel="first" href="lib.html" title='Python Library Reference' /> |
| 8 | <link rel='contents' href='contents.html' title="Contents" /> |
| 9 | <link rel='index' href='genindex.html' title='Index' /> |
| 10 | <link rel='last' href='about.html' title='About this document...' /> |
| 11 | <link rel='help' href='about.html' title='About this document...' /> |
| 12 | <link rel="next" href="module-textwrap.html" /> |
| 13 | <link rel="prev" href="module-StringIO.html" /> |
| 14 | <link rel="parent" href="strings.html" /> |
| 15 | <link rel="next" href="module-textwrap.html" /> |
| 16 | <meta name='aesop' content='information' /> |
| 17 | <title>4.7 cStringIO -- Faster version of StringIO</title> |
| 18 | </head> |
| 19 | <body> |
| 20 | <DIV CLASS="navigation"> |
| 21 | <div id='top-navigation-panel' xml:id='top-navigation-panel'> |
| 22 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> |
| 23 | <tr> |
| 24 | <td class='online-navigation'><a rel="prev" title="4.6 StringIO " |
| 25 | href="module-StringIO.html"><img src='../icons/previous.png' |
| 26 | border='0' height='32' alt='Previous Page' width='32' /></A></td> |
| 27 | <td class='online-navigation'><a rel="parent" title="4. String Services" |
| 28 | href="strings.html"><img src='../icons/up.png' |
| 29 | border='0' height='32' alt='Up One Level' width='32' /></A></td> |
| 30 | <td class='online-navigation'><a rel="next" title="4.8 textwrap " |
| 31 | href="module-textwrap.html"><img src='../icons/next.png' |
| 32 | border='0' height='32' alt='Next Page' width='32' /></A></td> |
| 33 | <td align="center" width="100%">Python Library Reference</td> |
| 34 | <td class='online-navigation'><a rel="contents" title="Table of Contents" |
| 35 | href="contents.html"><img src='../icons/contents.png' |
| 36 | border='0' height='32' alt='Contents' width='32' /></A></td> |
| 37 | <td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png' |
| 38 | border='0' height='32' alt='Module Index' width='32' /></a></td> |
| 39 | <td class='online-navigation'><a rel="index" title="Index" |
| 40 | href="genindex.html"><img src='../icons/index.png' |
| 41 | border='0' height='32' alt='Index' width='32' /></A></td> |
| 42 | </tr></table> |
| 43 | <div class='online-navigation'> |
| 44 | <b class="navlabel">Previous:</b> |
| 45 | <a class="sectref" rel="prev" href="module-StringIO.html">4.6 StringIO </A> |
| 46 | <b class="navlabel">Up:</b> |
| 47 | <a class="sectref" rel="parent" href="strings.html">4. String Services</A> |
| 48 | <b class="navlabel">Next:</b> |
| 49 | <a class="sectref" rel="next" href="module-textwrap.html">4.8 textwrap </A> |
| 50 | </div> |
| 51 | <hr /></div> |
| 52 | </DIV> |
| 53 | <!--End of Navigation Panel--> |
| 54 | |
| 55 | <H1><A NAME="SECTION006700000000000000000"> |
| 56 | 4.7 <tt class="module">cStringIO</tt> -- |
| 57 | Faster version of <tt class="module">StringIO</tt></A> |
| 58 | </H1> |
| 59 | |
| 60 | <P> |
| 61 | <A NAME="module-cStringIO"></A> |
| 62 | |
| 63 | <P> |
| 64 | The module <tt class="module">cStringIO</tt> provides an interface similar to that of |
| 65 | the <tt class="module"><a href="module-StringIO.html">StringIO</a></tt> module. Heavy use of <tt class="class">StringIO.StringIO</tt> |
| 66 | objects can be made more efficient by using the function |
| 67 | <tt class="function">StringIO()</tt> from this module instead. |
| 68 | |
| 69 | <P> |
| 70 | Since this module provides a factory function which returns objects of |
| 71 | built-in types, there's no way to build your own version using |
| 72 | subclassing. Use the original <tt class="module"><a href="module-StringIO.html">StringIO</a></tt> module in that case. |
| 73 | |
| 74 | <P> |
| 75 | Unlike the memory files implemented by the <tt class="module"><a href="module-StringIO.html">StringIO</a></tt> |
| 76 | module, those provided by this module are not able to accept Unicode |
| 77 | strings that cannot be encoded as plain ASCII strings. |
| 78 | |
| 79 | <P> |
| 80 | Another difference from the <tt class="module"><a href="module-StringIO.html">StringIO</a></tt> module is that calling |
| 81 | <tt class="function">StringIO()</tt> with a string parameter creates a read-only object. |
| 82 | Unlike an object created without a string parameter, it does not have |
| 83 | write methods. These objects are not generally visible. They turn up in |
| 84 | tracebacks as <tt class="class">StringI</tt> and <tt class="class">StringO</tt>. |
| 85 | |
| 86 | <P> |
| 87 | The following data objects are provided as well: |
| 88 | |
| 89 | <P> |
| 90 | <dl><dt><b><tt id='l2h-958' xml:id='l2h-958'>InputType</tt></b></dt> |
| 91 | <dd> |
| 92 | The type object of the objects created by calling |
| 93 | <tt class="function">StringIO</tt> with a string parameter. |
| 94 | </dd></dl> |
| 95 | |
| 96 | <P> |
| 97 | <dl><dt><b><tt id='l2h-959' xml:id='l2h-959'>OutputType</tt></b></dt> |
| 98 | <dd> |
| 99 | The type object of the objects returned by calling |
| 100 | <tt class="function">StringIO</tt> with no parameters. |
| 101 | </dd></dl> |
| 102 | |
| 103 | <P> |
| 104 | There is a C API to the module as well; refer to the module source for |
| 105 | more information. |
| 106 | |
| 107 | <DIV CLASS="navigation"> |
| 108 | <div class='online-navigation'> |
| 109 | <p></p><hr /> |
| 110 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> |
| 111 | <tr> |
| 112 | <td class='online-navigation'><a rel="prev" title="4.6 StringIO " |
| 113 | href="module-StringIO.html"><img src='../icons/previous.png' |
| 114 | border='0' height='32' alt='Previous Page' width='32' /></A></td> |
| 115 | <td class='online-navigation'><a rel="parent" title="4. String Services" |
| 116 | href="strings.html"><img src='../icons/up.png' |
| 117 | border='0' height='32' alt='Up One Level' width='32' /></A></td> |
| 118 | <td class='online-navigation'><a rel="next" title="4.8 textwrap " |
| 119 | href="module-textwrap.html"><img src='../icons/next.png' |
| 120 | border='0' height='32' alt='Next Page' width='32' /></A></td> |
| 121 | <td align="center" width="100%">Python Library Reference</td> |
| 122 | <td class='online-navigation'><a rel="contents" title="Table of Contents" |
| 123 | href="contents.html"><img src='../icons/contents.png' |
| 124 | border='0' height='32' alt='Contents' width='32' /></A></td> |
| 125 | <td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png' |
| 126 | border='0' height='32' alt='Module Index' width='32' /></a></td> |
| 127 | <td class='online-navigation'><a rel="index" title="Index" |
| 128 | href="genindex.html"><img src='../icons/index.png' |
| 129 | border='0' height='32' alt='Index' width='32' /></A></td> |
| 130 | </tr></table> |
| 131 | <div class='online-navigation'> |
| 132 | <b class="navlabel">Previous:</b> |
| 133 | <a class="sectref" rel="prev" href="module-StringIO.html">4.6 StringIO </A> |
| 134 | <b class="navlabel">Up:</b> |
| 135 | <a class="sectref" rel="parent" href="strings.html">4. String Services</A> |
| 136 | <b class="navlabel">Next:</b> |
| 137 | <a class="sectref" rel="next" href="module-textwrap.html">4.8 textwrap </A> |
| 138 | </div> |
| 139 | </div> |
| 140 | <hr /> |
| 141 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> |
| 142 | </DIV> |
| 143 | <!--End of Navigation Panel--> |
| 144 | <ADDRESS> |
| 145 | See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. |
| 146 | </ADDRESS> |
| 147 | </BODY> |
| 148 | </HTML> |