projects / OpenSPARC-T2-SAM / blame
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| 54 | ||
| 55 | <H1><A NAME="SECTION006600000000000000000"> | |
| 56 | 4.6 <tt class="module">StringIO</tt> -- | |
| 57 | Read and write strings as files</A> | |
| 58 | </H1> | |
| 59 | ||
| 60 | <P> | |
| 61 | <A NAME="module-StringIO"></A> | |
| 62 | ||
| 63 | <P> | |
| 64 | This module implements a file-like class, <tt class="class">StringIO</tt>, | |
| 65 | that reads and writes a string buffer (also known as <em>memory | |
| 66 | files</em>). See the description of file objects for operations (section | |
| 67 | <A href="bltin-file-objects.html#bltin-file-objects">2.3.9</A>). | |
| 68 | ||
| 69 | <P> | |
| 70 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 71 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-954' xml:id='l2h-954' class="class">StringIO</tt></b>(</nobr></td> | |
| 72 | <td><var></var><big>[</big><var>buffer</var><big>]</big><var></var>)</td></tr></table></dt> | |
| 73 | <dd> | |
| 74 | When a <tt class="class">StringIO</tt> object is created, it can be initialized | |
| 75 | to an existing string by passing the string to the constructor. | |
| 76 | If no string is given, the <tt class="class">StringIO</tt> will start empty. | |
| 77 | In both cases, the initial file position starts at zero. | |
| 78 | ||
| 79 | <P> | |
| 80 | The <tt class="class">StringIO</tt> object can accept either Unicode or 8-bit | |
| 81 | strings, but mixing the two may take some care. If both are used, | |
| 82 | 8-bit strings that cannot be interpreted as 7-bit ASCII (that | |
| 83 | use the 8th bit) will cause a <tt class="exception">UnicodeError</tt> to be raised | |
| 84 | when <tt class="method">getvalue()</tt> is called. | |
| 85 | </dl> | |
| 86 | ||
| 87 | <P> | |
| 88 | The following methods of <tt class="class">StringIO</tt> objects require special | |
| 89 | mention: | |
| 90 | ||
| 91 | <P> | |
| 92 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 93 | <td><nobr><b><tt id='l2h-955' xml:id='l2h-955' class="method">getvalue</tt></b>(</nobr></td> | |
| 94 | <td><var></var>)</td></tr></table></dt> | |
| 95 | <dd> | |
| 96 | Retrieve the entire contents of the ``file'' at any time before the | |
| 97 | <tt class="class">StringIO</tt> object's <tt class="method">close()</tt> method is called. See the | |
| 98 | note above for information about mixing Unicode and 8-bit strings; | |
| 99 | such mixing can cause this method to raise <tt class="exception">UnicodeError</tt>. | |
| 100 | </dl> | |
| 101 | ||
| 102 | <P> | |
| 103 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 104 | <td><nobr><b><tt id='l2h-956' xml:id='l2h-956' class="method">close</tt></b>(</nobr></td> | |
| 105 | <td><var></var>)</td></tr></table></dt> | |
| 106 | <dd> | |
| 107 | Free the memory buffer. | |
| 108 | </dl> | |
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