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<html><head><title>Python: module telemetry.page.page_test</title>
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<font color="#ffffff" face="helvetica, arial"> <br><big><big><strong><a href="telemetry.html"><font color="#ffffff">telemetry</font></a>.<a href="telemetry.page.html"><font color="#ffffff">page</font></a>.page_test</strong></big></big></font></td
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<p><tt># Copyright 2012 The Chromium Authors. All rights reserved.<br>
# Use of this source code is governed by a BSD-style license that can be<br>
# found in the LICENSE file.</tt></p>
<p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#aa55cc">
<td colspan=3 valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Modules</strong></big></font></td></tr>
<tr><td bgcolor="#aa55cc"><tt> </tt></td><td> </td>
<td width="100%"><table width="100%" summary="list"><tr><td width="25%" valign=top><a href="telemetry.page.action_runner.html">telemetry.page.action_runner</a><br>
</td><td width="25%" valign=top><a href="telemetry.core.exceptions.html">telemetry.core.exceptions</a><br>
</td><td width="25%" valign=top><a href="logging.html">logging</a><br>
</td><td width="25%" valign=top></td></tr></table></td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ee77aa">
<td colspan=3 valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr>
<tr><td bgcolor="#ee77aa"><tt> </tt></td><td> </td>
<td width="100%"><dl>
<dt><font face="helvetica, arial"><a href="__builtin__.html#object">__builtin__.object</a>
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="telemetry.page.page_test.html#PageTest">PageTest</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="exceptions.html#Exception">exceptions.Exception</a>(<a href="exceptions.html#BaseException">exceptions.BaseException</a>)
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="telemetry.page.page_test.html#MultiTabTestAppCrashError">MultiTabTestAppCrashError</a>
</font></dt><dt><font face="helvetica, arial"><a href="telemetry.page.page_test.html#TestNotSupportedOnPlatformError">TestNotSupportedOnPlatformError</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="telemetry.web_perf.story_test.html#Failure">telemetry.web_perf.story_test.Failure</a>(<a href="exceptions.html#Exception">exceptions.Exception</a>)
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="telemetry.page.page_test.html#MeasurementFailure">MeasurementFailure</a>
</font></dt></dl>
</dd>
</dl>
<p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="MeasurementFailure">class <strong>MeasurementFailure</strong></a>(<a href="telemetry.web_perf.story_test.html#Failure">telemetry.web_perf.story_test.Failure</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#PageTest">PageTest</a> <a href="exceptions.html#Exception">Exception</a> raised when an undesired but designed-for problem.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="telemetry.page.page_test.html#MeasurementFailure">MeasurementFailure</a></dd>
<dd><a href="telemetry.web_perf.story_test.html#Failure">telemetry.web_perf.story_test.Failure</a></dd>
<dd><a href="exceptions.html#Exception">exceptions.Exception</a></dd>
<dd><a href="exceptions.html#BaseException">exceptions.BaseException</a></dd>
<dd><a href="__builtin__.html#object">__builtin__.object</a></dd>
</dl>
<hr>
Data descriptors inherited from <a href="telemetry.web_perf.story_test.html#Failure">telemetry.web_perf.story_test.Failure</a>:<br>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Methods inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><a name="MeasurementFailure-__init__"><strong>__init__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__init__">__init__</a>(...) initializes x; see help(type(x)) for signature</tt></dd></dl>
<hr>
Data and other attributes inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><strong>__new__</strong> = <built-in method __new__ of type object><dd><tt>T.<a href="#MeasurementFailure-__new__">__new__</a>(S, ...) -> a new <a href="__builtin__.html#object">object</a> with type S, a subtype of T</tt></dl>
<hr>
Methods inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><a name="MeasurementFailure-__delattr__"><strong>__delattr__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__delattr__">__delattr__</a>('name') <==> del x.name</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__getattribute__"><strong>__getattribute__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__getattribute__">__getattribute__</a>('name') <==> x.name</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__getitem__"><strong>__getitem__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__getitem__">__getitem__</a>(y) <==> x[y]</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__getslice__"><strong>__getslice__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__getslice__">__getslice__</a>(i, j) <==> x[i:j]<br>
<br>
Use of negative indices is not supported.</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__reduce__"><strong>__reduce__</strong></a>(...)</dt></dl>
<dl><dt><a name="MeasurementFailure-__repr__"><strong>__repr__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__repr__">__repr__</a>() <==> repr(x)</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__setattr__"><strong>__setattr__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__setattr__">__setattr__</a>('name', value) <==> x.name = value</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__setstate__"><strong>__setstate__</strong></a>(...)</dt></dl>
<dl><dt><a name="MeasurementFailure-__str__"><strong>__str__</strong></a>(...)</dt><dd><tt>x.<a href="#MeasurementFailure-__str__">__str__</a>() <==> str(x)</tt></dd></dl>
<dl><dt><a name="MeasurementFailure-__unicode__"><strong>__unicode__</strong></a>(...)</dt></dl>
<hr>
Data descriptors inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><strong>__dict__</strong></dt>
</dl>
<dl><dt><strong>args</strong></dt>
</dl>
<dl><dt><strong>message</strong></dt>
</dl>
</td></tr></table> <p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="MultiTabTestAppCrashError">class <strong>MultiTabTestAppCrashError</strong></a>(<a href="exceptions.html#Exception">exceptions.Exception</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#PageTest">PageTest</a> <a href="exceptions.html#Exception">Exception</a> raised after browser or tab crash for multi-tab tests.<br>
<br>
Used to abort the test rather than try to recover from an unknown state.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="telemetry.page.page_test.html#MultiTabTestAppCrashError">MultiTabTestAppCrashError</a></dd>
<dd><a href="exceptions.html#Exception">exceptions.Exception</a></dd>
<dd><a href="exceptions.html#BaseException">exceptions.BaseException</a></dd>
<dd><a href="__builtin__.html#object">__builtin__.object</a></dd>
</dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Methods inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><a name="MultiTabTestAppCrashError-__init__"><strong>__init__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__init__">__init__</a>(...) initializes x; see help(type(x)) for signature</tt></dd></dl>
<hr>
Data and other attributes inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><strong>__new__</strong> = <built-in method __new__ of type object><dd><tt>T.<a href="#MultiTabTestAppCrashError-__new__">__new__</a>(S, ...) -> a new <a href="__builtin__.html#object">object</a> with type S, a subtype of T</tt></dl>
<hr>
Methods inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><a name="MultiTabTestAppCrashError-__delattr__"><strong>__delattr__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__delattr__">__delattr__</a>('name') <==> del x.name</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__getattribute__"><strong>__getattribute__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__getattribute__">__getattribute__</a>('name') <==> x.name</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__getitem__"><strong>__getitem__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__getitem__">__getitem__</a>(y) <==> x[y]</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__getslice__"><strong>__getslice__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__getslice__">__getslice__</a>(i, j) <==> x[i:j]<br>
<br>
Use of negative indices is not supported.</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__reduce__"><strong>__reduce__</strong></a>(...)</dt></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__repr__"><strong>__repr__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__repr__">__repr__</a>() <==> repr(x)</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__setattr__"><strong>__setattr__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__setattr__">__setattr__</a>('name', value) <==> x.name = value</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__setstate__"><strong>__setstate__</strong></a>(...)</dt></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__str__"><strong>__str__</strong></a>(...)</dt><dd><tt>x.<a href="#MultiTabTestAppCrashError-__str__">__str__</a>() <==> str(x)</tt></dd></dl>
<dl><dt><a name="MultiTabTestAppCrashError-__unicode__"><strong>__unicode__</strong></a>(...)</dt></dl>
<hr>
Data descriptors inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><strong>__dict__</strong></dt>
</dl>
<dl><dt><strong>args</strong></dt>
</dl>
<dl><dt><strong>message</strong></dt>
</dl>
</td></tr></table> <p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="PageTest">class <strong>PageTest</strong></a>(<a href="__builtin__.html#object">__builtin__.object</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt>A class styled on unittest.TestCase for creating page-specific tests.<br>
<br>
Test should override ValidateAndMeasurePage to perform test<br>
validation and page measurement as necessary.<br>
<br>
class BodyChildElementMeasurement(<a href="#PageTest">PageTest</a>):<br>
def <a href="#PageTest-ValidateAndMeasurePage">ValidateAndMeasurePage</a>(self, page, tab, results):<br>
body_child_count = tab.EvaluateJavaScript(<br>
'document.body.children.length')<br>
results.AddValue(scalar.ScalarValue(<br>
page, 'body_children', 'count', body_child_count))<br> </tt></td></tr>
<tr><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="PageTest-CustomizeBrowserOptions"><strong>CustomizeBrowserOptions</strong></a>(self, options)</dt><dd><tt>Override to add test-specific options to the BrowserOptions <a href="__builtin__.html#object">object</a></tt></dd></dl>
<dl><dt><a name="PageTest-DidNavigateToPage"><strong>DidNavigateToPage</strong></a>(self, page, tab)</dt><dd><tt>Override to do operations right after the page is navigated and after<br>
all waiting for completion has occurred.</tt></dd></dl>
<dl><dt><a name="PageTest-DidRunPage"><strong>DidRunPage</strong></a>(self, platform)</dt><dd><tt>Called after the test run method was run, even if it failed.</tt></dd></dl>
<dl><dt><a name="PageTest-DidStartBrowser"><strong>DidStartBrowser</strong></a>(self, browser)</dt><dd><tt>Override to customize the browser right after it has launched.</tt></dd></dl>
<dl><dt><a name="PageTest-RestartBrowserBeforeEachPage"><strong>RestartBrowserBeforeEachPage</strong></a>(self)</dt><dd><tt>Should the browser be restarted for the page?<br>
<br>
This returns true if the test needs to unconditionally restart the<br>
browser for each page. It may be called before the browser is started.</tt></dd></dl>
<dl><dt><a name="PageTest-RunNavigateSteps"><strong>RunNavigateSteps</strong></a>(self, page, tab)</dt><dd><tt>Navigates the tab to the page URL attribute.<br>
<br>
Runs the 'navigate_steps' page attribute as a compound action.</tt></dd></dl>
<dl><dt><a name="PageTest-SetOptions"><strong>SetOptions</strong></a>(self, options)</dt><dd><tt>Sets the BrowserFinderOptions instance to use.</tt></dd></dl>
<dl><dt><a name="PageTest-StopBrowserAfterPage"><strong>StopBrowserAfterPage</strong></a>(self, browser, page)</dt><dd><tt>Should the browser be stopped after the page is run?<br>
<br>
This is called after a page is run to decide whether the browser needs to<br>
be stopped to clean up its state. If it is stopped, then it will be<br>
restarted to run the next page.<br>
<br>
A test that overrides this can look at both the page and the browser to<br>
decide whether it needs to stop the browser.</tt></dd></dl>
<dl><dt><a name="PageTest-TabForPage"><strong>TabForPage</strong></a>(self, page, browser)</dt><dd><tt>Override to select a different tab for the page. For instance, to<br>
create a new tab for every page, return browser.tabs.New().</tt></dd></dl>
<dl><dt><a name="PageTest-ValidateAndMeasurePage"><strong>ValidateAndMeasurePage</strong></a>(self, page, tab, results)</dt><dd><tt>Override to check test assertions and perform measurement.<br>
<br>
When adding measurement results, call results.AddValue(...) for<br>
each result. Raise an exception or add a failure.FailureValue on<br>
failure. page_test.py also provides several base exception classes<br>
to use.<br>
<br>
Prefer metric value names that are in accordance with python<br>
variable style. e.g., metric_name. The name 'url' must not be used.<br>
<br>
Put together:<br>
def <a href="#PageTest-ValidateAndMeasurePage">ValidateAndMeasurePage</a>(self, page, tab, results):<br>
res = tab.EvaluateJavaScript('2+2')<br>
if res != 4:<br>
raise <a href="exceptions.html#Exception">Exception</a>('Oh, wow.')<br>
results.AddValue(scalar.ScalarValue(<br>
page, 'two_plus_two', 'count', res))<br>
<br>
Args:<br>
page: A telemetry.page.Page instance.<br>
tab: A telemetry.core.Tab instance.<br>
results: A telemetry.results.PageTestResults instance.</tt></dd></dl>
<dl><dt><a name="PageTest-WillNavigateToPage"><strong>WillNavigateToPage</strong></a>(self, page, tab)</dt><dd><tt>Override to do operations before the page is navigated, notably Telemetry<br>
will already have performed the following operations on the browser before<br>
calling this function:<br>
* Ensure only one tab is open.<br>
* Call WaitForDocumentReadyStateToComplete on the tab.</tt></dd></dl>
<dl><dt><a name="PageTest-WillStartBrowser"><strong>WillStartBrowser</strong></a>(self, platform)</dt><dd><tt>Override to manipulate the browser environment before it launches.</tt></dd></dl>
<dl><dt><a name="PageTest-__init__"><strong>__init__</strong></a>(self, needs_browser_restart_after_each_page<font color="#909090">=False</font>, clear_cache_before_each_run<font color="#909090">=False</font>)</dt></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary for instance variables (if defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<dl><dt><strong>clear_cache_before_each_run</strong></dt>
<dd><tt>When set to True, the browser's disk and memory cache will be cleared<br>
before each run.</tt></dd>
</dl>
<dl><dt><strong>close_tabs_before_run</strong></dt>
<dd><tt>When set to True, all tabs are closed before running the test for the<br>
first time.</tt></dd>
</dl>
<dl><dt><strong>is_multi_tab_test</strong></dt>
<dd><tt>Returns True if the test opens multiple tabs.<br>
<br>
If the test overrides TabForPage, it is deemed a multi-tab test.<br>
Multi-tab tests do not retry after tab or browser crashes, whereas,<br>
single-tab tests too. That is because the state of multi-tab tests<br>
(e.g., how many tabs are open, etc.) is unknown after crashes.</tt></dd>
</dl>
</td></tr></table> <p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="TestNotSupportedOnPlatformError">class <strong>TestNotSupportedOnPlatformError</strong></a>(<a href="exceptions.html#Exception">exceptions.Exception</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#PageTest">PageTest</a> <a href="exceptions.html#Exception">Exception</a> raised when a required feature is unavailable.<br>
<br>
The feature required to run the test could be part of the platform,<br>
hardware configuration, or browser.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="telemetry.page.page_test.html#TestNotSupportedOnPlatformError">TestNotSupportedOnPlatformError</a></dd>
<dd><a href="exceptions.html#Exception">exceptions.Exception</a></dd>
<dd><a href="exceptions.html#BaseException">exceptions.BaseException</a></dd>
<dd><a href="__builtin__.html#object">__builtin__.object</a></dd>
</dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Methods inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><a name="TestNotSupportedOnPlatformError-__init__"><strong>__init__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__init__">__init__</a>(...) initializes x; see help(type(x)) for signature</tt></dd></dl>
<hr>
Data and other attributes inherited from <a href="exceptions.html#Exception">exceptions.Exception</a>:<br>
<dl><dt><strong>__new__</strong> = <built-in method __new__ of type object><dd><tt>T.<a href="#TestNotSupportedOnPlatformError-__new__">__new__</a>(S, ...) -> a new <a href="__builtin__.html#object">object</a> with type S, a subtype of T</tt></dl>
<hr>
Methods inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><a name="TestNotSupportedOnPlatformError-__delattr__"><strong>__delattr__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__delattr__">__delattr__</a>('name') <==> del x.name</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__getattribute__"><strong>__getattribute__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__getattribute__">__getattribute__</a>('name') <==> x.name</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__getitem__"><strong>__getitem__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__getitem__">__getitem__</a>(y) <==> x[y]</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__getslice__"><strong>__getslice__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__getslice__">__getslice__</a>(i, j) <==> x[i:j]<br>
<br>
Use of negative indices is not supported.</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__reduce__"><strong>__reduce__</strong></a>(...)</dt></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__repr__"><strong>__repr__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__repr__">__repr__</a>() <==> repr(x)</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__setattr__"><strong>__setattr__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__setattr__">__setattr__</a>('name', value) <==> x.name = value</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__setstate__"><strong>__setstate__</strong></a>(...)</dt></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__str__"><strong>__str__</strong></a>(...)</dt><dd><tt>x.<a href="#TestNotSupportedOnPlatformError-__str__">__str__</a>() <==> str(x)</tt></dd></dl>
<dl><dt><a name="TestNotSupportedOnPlatformError-__unicode__"><strong>__unicode__</strong></a>(...)</dt></dl>
<hr>
Data descriptors inherited from <a href="exceptions.html#BaseException">exceptions.BaseException</a>:<br>
<dl><dt><strong>__dict__</strong></dt>
</dl>
<dl><dt><strong>args</strong></dt>
</dl>
<dl><dt><strong>message</strong></dt>
</dl>
</td></tr></table></td></tr></table>
</body></html>