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| 54 | |
| 55 | <H3><A NAME="SECTION007262000000000000000"></A><A NAME="doctest-Example"></A> |
| 56 | <BR> |
| 57 | 5.2.6.2 Example Objects |
| 58 | </H3> |
| 59 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 60 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-1087' xml:id='l2h-1087' class="class">Example</tt></b>(</nobr></td> |
| 61 | <td><var>source, want</var><big>[</big><var>, |
| 62 | exc_msg</var><big>]</big><var></var><big>[</big><var>, lineno</var><big>]</big><var></var><big>[</big><var>, |
| 63 | indent</var><big>]</big><var></var><big>[</big><var>, options</var><big>]</big><var></var>)</td></tr></table></dt> |
| 64 | <dd> |
| 65 | A single interactive example, consisting of a Python statement and |
| 66 | its expected output. The constructor arguments are used to |
| 67 | initialize the member variables of the same names. |
| 68 | |
| 69 | <span class="versionnote">New in version 2.4.</span> |
| 70 | |
| 71 | </dl> |
| 72 | |
| 73 | <P> |
| 74 | <tt class="class">Example</tt> defines the following member variables. They are |
| 75 | initialized by the constructor, and should not be modified directly. |
| 76 | |
| 77 | <P> |
| 78 | <dl><dt><b><tt id='l2h-1088' xml:id='l2h-1088' class="member">source</tt></b></dt> |
| 79 | <dd> |
| 80 | A string containing the example's source code. This source code |
| 81 | consists of a single Python statement, and always ends with a |
| 82 | newline; the constructor adds a newline when necessary. |
| 83 | </dl> |
| 84 | |
| 85 | <P> |
| 86 | <dl><dt><b><tt id='l2h-1089' xml:id='l2h-1089' class="member">want</tt></b></dt> |
| 87 | <dd> |
| 88 | The expected output from running the example's source code (either |
| 89 | from stdout, or a traceback in case of exception). <tt class="member">want</tt> |
| 90 | ends with a newline unless no output is expected, in which case |
| 91 | it's an empty string. The constructor adds a newline when |
| 92 | necessary. |
| 93 | </dl> |
| 94 | |
| 95 | <P> |
| 96 | <dl><dt><b><tt id='l2h-1090' xml:id='l2h-1090' class="member">exc_msg</tt></b></dt> |
| 97 | <dd> |
| 98 | The exception message generated by the example, if the example is |
| 99 | expected to generate an exception; or <code>None</code> if it is not |
| 100 | expected to generate an exception. This exception message is |
| 101 | compared against the return value of |
| 102 | <tt class="function">traceback.format_exception_only()</tt>. <tt class="member">exc_msg</tt> |
| 103 | ends with a newline unless it's <code>None</code>. The constructor adds |
| 104 | a newline if needed. |
| 105 | </dl> |
| 106 | |
| 107 | <P> |
| 108 | <dl><dt><b><tt id='l2h-1091' xml:id='l2h-1091' class="member">lineno</tt></b></dt> |
| 109 | <dd> |
| 110 | The line number within the string containing this example where |
| 111 | the example begins. This line number is zero-based with respect |
| 112 | to the beginning of the containing string. |
| 113 | </dl> |
| 114 | |
| 115 | <P> |
| 116 | <dl><dt><b><tt id='l2h-1092' xml:id='l2h-1092' class="member">indent</tt></b></dt> |
| 117 | <dd> |
| 118 | The example's indentation in the containing string, i.e., the |
| 119 | number of space characters that precede the example's first |
| 120 | prompt. |
| 121 | </dl> |
| 122 | |
| 123 | <P> |
| 124 | <dl><dt><b><tt id='l2h-1093' xml:id='l2h-1093' class="member">options</tt></b></dt> |
| 125 | <dd> |
| 126 | A dictionary mapping from option flags to <code>True</code> or |
| 127 | <code>False</code>, which is used to override default options for this |
| 128 | example. Any option flags not contained in this dictionary are |
| 129 | left at their default value (as specified by the |
| 130 | <tt class="class">DocTestRunner</tt>'s <tt class="member">optionflags</tt>). |
| 131 | By default, no options are set. |
| 132 | </dl> |
| 133 | |
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