projects / OpenSPARC-T2-SAM / blame
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| 54 | ||
| 55 | <H1><A NAME="SECTION008500000000000000000"></A><A NAME="del"></A> | |
| 56 | <BR> | |
| 57 | 6.5 The <tt class="keyword">del</tt> statement | |
| 58 | </H1> | |
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| 61 | <dl><dd class="grammar"> | |
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| 63 | <table> | |
| 64 | <tr> | |
| 65 | <td><a id='tok-del_stmt' xml:id='tok-del_stmt'>del_stmt</a></td> | |
| 66 | <td>::=</td> | |
| 67 | <td>"del" <a class='grammartoken' href="assignment.html#tok-target_list">target_list</a></td></tr> | |
| 68 | </table> | |
| 69 | </div> | |
| 70 | <a class="grammar-footer" | |
| 71 | href="grammar.txt" type="text/plain" | |
| 72 | >Download entire grammar as text.</a> | |
| 73 | </dd></dl> | |
| 74 | ||
| 75 | <P> | |
| 76 | Deletion is recursively defined very similar to the way assignment is | |
| 77 | defined. Rather that spelling it out in full details, here are some | |
| 78 | hints. | |
| 79 | <a id='l2h-489' xml:id='l2h-489'></a><a id='l2h-490' xml:id='l2h-490'></a> | |
| 80 | <P> | |
| 81 | Deletion of a target list recursively deletes each target, from left | |
| 82 | to right. | |
| 83 | ||
| 84 | <P> | |
| 85 | Deletion of a name removes the binding of that name | |
| 86 | from the local or global namespace, depending on whether the name | |
| 87 | occurs in a <tt class="keyword">global</tt> statement in the same code block. If the | |
| 88 | name is unbound, a <tt class="exception">NameError</tt> exception will be raised. | |
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| 90 | <P> | |
| 91 | It is illegal to delete a name from the local namespace if it occurs | |
| 92 | as a free variable<a id='l2h-493' xml:id='l2h-493'></a> in a nested block. | |
| 93 | ||
| 94 | <P> | |
| 95 | Deletion of attribute references, subscriptions and slicings | |
| 96 | is passed to the primary object involved; deletion of a slicing | |
| 97 | is in general equivalent to assignment of an empty slice of the | |
| 98 | right type (but even this is determined by the sliced object). | |
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| 136 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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