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+  <title>googleapiclient._helpers</title>
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+
+<body bgcolor="white" text="black" link="blue" vlink="#204080"
+      alink="#204080">
+<!-- ==================== NAVIGATION BAR ==================== -->
+<table class="navbar" border="0" width="100%" cellpadding="0"
+       bgcolor="#a0c0ff" cellspacing="0">
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+  <!-- Home link -->
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+        href="googleapiclient-module.html">Home</a>&nbsp;&nbsp;&nbsp;</th>
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+        href="module-tree.html">Trees</a>&nbsp;&nbsp;&nbsp;</th>
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+        href="identifier-index.html">Indices</a>&nbsp;&nbsp;&nbsp;</th>
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+        href="help.html">Help</a>&nbsp;&nbsp;&nbsp;</th>
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+</table>
+<table width="100%" cellpadding="0" cellspacing="0">
+  <tr valign="top">
+    <td width="100%">
+      <span class="breadcrumbs">
+        <a href="googleapiclient-module.html">Package&nbsp;googleapiclient</a> ::
+        Module&nbsp;_helpers
+      </span>
+    </td>
+    <td>
+      <table cellpadding="0" cellspacing="0">
+        <!-- hide/show private -->
+        <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink"
+    onclick="toggle_private();">hide&nbsp;private</a>]</span></td></tr>
+        <tr><td align="right"><span class="options"
+            >[<a href="frames.html" target="_top">frames</a
+            >]&nbsp;|&nbsp;<a href="googleapiclient._helpers-module.html"
+            target="_top">no&nbsp;frames</a>]</span></td></tr>
+      </table>
+    </td>
+  </tr>
+</table>
+<!-- ==================== MODULE DESCRIPTION ==================== -->
+<h1 class="epydoc">Module _helpers</h1><p class="nomargin-top"><span class="codelink"><a href="googleapiclient._helpers-pysrc.html">source&nbsp;code</a></span></p>
+<pre class="literalblock">
+Helper functions for commonly used utilities.
+
+</pre>
+
+<!-- ==================== FUNCTIONS ==================== -->
+<a name="section-Functions"></a>
+<table class="summary" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Functions</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-Functions"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#positional" class="summary-sig-name">positional</a>(<span class="summary-sig-arg">max_positional_args</span>)</span><br />
+      A decorator to declare that only the first N arguments my be positional.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._helpers-pysrc.html#positional">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#parse_unique_urlencoded" class="summary-sig-name">parse_unique_urlencoded</a>(<span class="summary-sig-arg">content</span>)</span><br />
+      Parses unique key-value parameters from urlencoded content.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._helpers-pysrc.html#parse_unique_urlencoded">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#update_query_params" class="summary-sig-name">update_query_params</a>(<span class="summary-sig-arg">uri</span>,
+        <span class="summary-sig-arg">params</span>)</span><br />
+      Updates a URI with new query parameters.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._helpers-pysrc.html#update_query_params">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr class="private">
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="googleapiclient._helpers-module.html#_add_query_parameter" class="summary-sig-name" onclick="show_private();">_add_query_parameter</a>(<span class="summary-sig-arg">url</span>,
+        <span class="summary-sig-arg">name</span>,
+        <span class="summary-sig-arg">value</span>)</span><br />
+      Adds a query parameter to a url.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="googleapiclient._helpers-pysrc.html#_add_query_parameter">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+</table>
+<!-- ==================== VARIABLES ==================== -->
+<a name="section-Variables"></a>
+<table class="summary" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Variables</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-Variables"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="logger"></a><span class="summary-name">logger</span> = <code title="logging.getLogger(__name__)">logging.getLogger(__name__)</code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="POSITIONAL_WARNING"></a><span class="summary-name">POSITIONAL_WARNING</span> = <code title="'WARNING'">'WARNING'</code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="POSITIONAL_EXCEPTION"></a><span class="summary-name">POSITIONAL_EXCEPTION</span> = <code title="'EXCEPTION'">'EXCEPTION'</code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="POSITIONAL_IGNORE"></a><span class="summary-name">POSITIONAL_IGNORE</span> = <code title="'IGNORE'">'IGNORE'</code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a href="googleapiclient._helpers-module.html#POSITIONAL_SET" class="summary-name">POSITIONAL_SET</a> = <code title="frozenset([POSITIONAL_WARNING, POSITIONAL_EXCEPTION, POSITIONAL_IGNORE\
+])">frozenset([POSITIONAL_WARNING, POSITIONAL_EXC<code class="variable-ellipsis">...</code></code>
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="positional_parameters_enforcement"></a><span class="summary-name">positional_parameters_enforcement</span> = <code title="'WARNING'">'WARNING'</code>
+    </td>
+  </tr>
+<tr class="private">
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="_SYM_LINK_MESSAGE"></a><span class="summary-name">_SYM_LINK_MESSAGE</span> = <code title="'File: {0}: Is a symbolic link.'">'File: {0}: Is a symbolic link.'</code>
+    </td>
+  </tr>
+<tr class="private">
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a name="_IS_DIR_MESSAGE"></a><span class="summary-name">_IS_DIR_MESSAGE</span> = <code title="'{0}: Is a directory'">'{0}: Is a directory'</code>
+    </td>
+  </tr>
+<tr class="private">
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+        <a href="googleapiclient._helpers-module.html#_MISSING_FILE_MESSAGE" class="summary-name" onclick="show_private();">_MISSING_FILE_MESSAGE</a> = <code title="'Cannot access {0}: No such file or directory'">'Cannot access {0}: No such file or di<code class="variable-ellipsis">...</code></code>
+    </td>
+  </tr>
+</table>
+<!-- ==================== FUNCTION DETAILS ==================== -->
+<a name="section-FunctionDetails"></a>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Function Details</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-FunctionDetails"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+</table>
+<a name="positional"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">positional</span>(<span class="sig-arg">max_positional_args</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#positional">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+A decorator to declare that only the first N arguments my be positional.
+
+This decorator makes it easy to support Python 3 style keyword-only
+parameters. For example, in Python 3 it is possible to write::
+
+    def fn(pos1, *, kwonly1=None, kwonly1=None):
+        ...
+
+All named parameters after ``*`` must be a keyword::
+
+    fn(10, 'kw1', 'kw2')  # Raises exception.
+    fn(10, kwonly1='kw1')  # Ok.
+
+Example
+^^^^^^^
+
+To define a function like above, do::
+
+    @positional(1)
+    def fn(pos1, kwonly1=None, kwonly2=None):
+        ...
+
+If no default value is provided to a keyword argument, it becomes a
+required keyword argument::
+
+    @positional(0)
+    def fn(required_kw):
+        ...
+
+This must be called with the keyword parameter::
+
+    fn()  # Raises exception.
+    fn(10)  # Raises exception.
+    fn(required_kw=10)  # Ok.
+
+When defining instance or class methods always remember to account for
+``self`` and ``cls``::
+
+    class MyClass(object):
+
+        @positional(2)
+        def my_method(self, pos1, kwonly1=None):
+            ...
+
+        @classmethod
+        @positional(2)
+        def my_method(cls, pos1, kwonly1=None):
+            ...
+
+The positional decorator behavior is controlled by
+``_helpers.positional_parameters_enforcement``, which may be set to
+``POSITIONAL_EXCEPTION``, ``POSITIONAL_WARNING`` or
+``POSITIONAL_IGNORE`` to raise an exception, log a warning, or do
+nothing, respectively, if a declaration is violated.
+
+Args:
+    max_positional_arguments: Maximum number of positional arguments. All
+                              parameters after the this index must be
+                              keyword only.
+
+Returns:
+    A decorator that prevents using arguments after max_positional_args
+    from being used as positional parameters.
+
+Raises:
+    TypeError: if a key-word only argument is provided as a positional
+               parameter, but only if
+               _helpers.positional_parameters_enforcement is set to
+               POSITIONAL_EXCEPTION.
+
+</pre>
+  <dl class="fields">
+  </dl>
+</td></tr></table>
+</div>
+<a name="parse_unique_urlencoded"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">parse_unique_urlencoded</span>(<span class="sig-arg">content</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#parse_unique_urlencoded">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Parses unique key-value parameters from urlencoded content.
+
+Args:
+    content: string, URL-encoded key-value pairs.
+
+Returns:
+    dict, The key-value pairs from ``content``.
+
+Raises:
+    ValueError: if one of the keys is repeated.
+
+</pre>
+  <dl class="fields">
+  </dl>
+</td></tr></table>
+</div>
+<a name="update_query_params"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">update_query_params</span>(<span class="sig-arg">uri</span>,
+        <span class="sig-arg">params</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#update_query_params">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Updates a URI with new query parameters.
+
+If a given key from ``params`` is repeated in the ``uri``, then
+the URI will be considered invalid and an error will occur.
+
+If the URI is valid, then each value from ``params`` will
+replace the corresponding value in the query parameters (if
+it exists).
+
+Args:
+    uri: string, A valid URI, with potential existing query parameters.
+    params: dict, A dictionary of query parameters.
+
+Returns:
+    The same URI but with the new query parameters added.
+
+</pre>
+  <dl class="fields">
+  </dl>
+</td></tr></table>
+</div>
+<a name="_add_query_parameter"></a>
+<div class="private">
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">_add_query_parameter</span>(<span class="sig-arg">url</span>,
+        <span class="sig-arg">name</span>,
+        <span class="sig-arg">value</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="googleapiclient._helpers-pysrc.html#_add_query_parameter">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Adds a query parameter to a url.
+
+Replaces the current value if it already exists in the URL.
+
+Args:
+    url: string, url to add the query parameter to.
+    name: string, query parameter name.
+    value: string, query parameter value.
+
+Returns:
+    Updated query parameter. Does not update the url if value is None.
+
+</pre>
+  <dl class="fields">
+  </dl>
+</td></tr></table>
+</div>
+<br />
+<!-- ==================== VARIABLES DETAILS ==================== -->
+<a name="section-VariablesDetails"></a>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Variables Details</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-VariablesDetails"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+</table>
+<a name="POSITIONAL_SET"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <h3 class="epydoc">POSITIONAL_SET</h3>
+  
+  <dl class="fields">
+  </dl>
+  <dl class="fields">
+    <dt>Value:</dt>
+      <dd><table><tr><td><pre class="variable">
+frozenset([POSITIONAL_WARNING, POSITIONAL_EXCEPTION, POSITIONAL_IGNORE<span class="variable-linewrap"><img src="crarr.png" alt="\" /></span>
+])
+</pre></td></tr></table>
+</dd>
+  </dl>
+</td></tr></table>
+</div>
+<a name="_MISSING_FILE_MESSAGE"></a>
+<div class="private">
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <h3 class="epydoc">_MISSING_FILE_MESSAGE</h3>
+  
+  <dl class="fields">
+  </dl>
+  <dl class="fields">
+    <dt>Value:</dt>
+      <dd><table><tr><td><pre class="variable">
+'Cannot access {0}: No such file or directory'
+</pre></td></tr></table>
+</dd>
+  </dl>
+</td></tr></table>
+</div>
+<br />
+<!-- ==================== NAVIGATION BAR ==================== -->
+<table class="navbar" border="0" width="100%" cellpadding="0"
+       bgcolor="#a0c0ff" cellspacing="0">
+  <tr valign="middle">
+  <!-- Home link -->
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+
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