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<div class="section" id="data-types">
<span id="datatypes"></span><h1>8. Data Types<a class="headerlink" href="#data-types" title="本標題的永久連結">¶</a></h1>
<p>The modules described in this chapter provide a variety of specialized data
types such as dates and times, fixed-type arrays, heap queues, synchronized
queues, and sets.</p>
<p>Python also provides some built-in data types, in particular,
<a class="reference internal" href="stdtypes.html#dict" title="dict"><code class="xref py py-class docutils literal notranslate"><span class="pre">dict</span></code></a>, <a class="reference internal" href="stdtypes.html#list" title="list"><code class="xref py py-class docutils literal notranslate"><span class="pre">list</span></code></a>, <a class="reference internal" href="stdtypes.html#set" title="set"><code class="xref py py-class docutils literal notranslate"><span class="pre">set</span></code></a> and <a class="reference internal" href="stdtypes.html#frozenset" title="frozenset"><code class="xref py py-class docutils literal notranslate"><span class="pre">frozenset</span></code></a>, and
<a class="reference internal" href="stdtypes.html#tuple" title="tuple"><code class="xref py py-class docutils literal notranslate"><span class="pre">tuple</span></code></a>. The <a class="reference internal" href="stdtypes.html#str" title="str"><code class="xref py py-class docutils literal notranslate"><span class="pre">str</span></code></a> class is used to hold
Unicode strings, and the <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a> class is used to hold binary data.</p>
<p>The following modules are documented in this chapter:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="datetime.html">8.1. <code class="docutils literal notranslate"><span class="pre">datetime</span></code> — Basic date and time types</a><ul>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#available-types">8.1.1. Available Types</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#timedelta-objects">8.1.2. <code class="docutils literal notranslate"><span class="pre">timedelta</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#date-objects">8.1.3. <code class="docutils literal notranslate"><span class="pre">date</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#datetime-objects">8.1.4. <code class="docutils literal notranslate"><span class="pre">datetime</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#time-objects">8.1.5. <code class="docutils literal notranslate"><span class="pre">time</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#tzinfo-objects">8.1.6. <code class="docutils literal notranslate"><span class="pre">tzinfo</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#timezone-objects">8.1.7. <code class="docutils literal notranslate"><span class="pre">timezone</span></code> Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="datetime.html#strftime-and-strptime-behavior">8.1.8. <code class="docutils literal notranslate"><span class="pre">strftime()</span></code> and <code class="docutils literal notranslate"><span class="pre">strptime()</span></code> Behavior</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="calendar.html">8.2. <code class="docutils literal notranslate"><span class="pre">calendar</span></code> — General calendar-related functions</a></li>
<li class="toctree-l1"><a class="reference internal" href="collections.html">8.3. <code class="docutils literal notranslate"><span class="pre">collections</span></code> — 容器資料型態</a><ul>
<li class="toctree-l2"><a class="reference internal" href="collections.html#chainmap-objects">8.3.1. <code class="docutils literal notranslate"><span class="pre">ChainMap</span></code> objects</a><ul>
<li class="toctree-l3"><a class="reference internal" href="collections.html#chainmap-examples-and-recipes">8.3.1.1. <code class="docutils literal notranslate"><span class="pre">ChainMap</span></code> Examples and Recipes</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#counter-objects">8.3.2. <code class="docutils literal notranslate"><span class="pre">Counter</span></code> 物件</a></li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#deque-objects">8.3.3. <code class="docutils literal notranslate"><span class="pre">deque</span></code> objects</a><ul>
<li class="toctree-l3"><a class="reference internal" href="collections.html#deque-recipes">8.3.3.1. <code class="docutils literal notranslate"><span class="pre">deque</span></code> Recipes</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#defaultdict-objects">8.3.4. <code class="docutils literal notranslate"><span class="pre">defaultdict</span></code> objects</a><ul>
<li class="toctree-l3"><a class="reference internal" href="collections.html#defaultdict-examples">8.3.4.1. <code class="docutils literal notranslate"><span class="pre">defaultdict</span></code> Examples</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#namedtuple-factory-function-for-tuples-with-named-fields">8.3.5. <code class="docutils literal notranslate"><span class="pre">namedtuple()</span></code> Factory Function for Tuples with Named Fields</a></li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#ordereddict-objects">8.3.6. <code class="docutils literal notranslate"><span class="pre">OrderedDict</span></code> objects</a><ul>
<li class="toctree-l3"><a class="reference internal" href="collections.html#ordereddict-examples-and-recipes">8.3.6.1. <code class="docutils literal notranslate"><span class="pre">OrderedDict</span></code> Examples and Recipes</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#userdict-objects">8.3.7. <code class="docutils literal notranslate"><span class="pre">UserDict</span></code> objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#userlist-objects">8.3.8. <code class="docutils literal notranslate"><span class="pre">UserList</span></code> objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="collections.html#userstring-objects">8.3.9. <code class="docutils literal notranslate"><span class="pre">UserString</span></code> objects</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="collections.abc.html">8.4. <code class="docutils literal notranslate"><span class="pre">collections.abc</span></code> — Abstract Base Classes for Containers</a><ul>
<li class="toctree-l2"><a class="reference internal" href="collections.abc.html#collections-abstract-base-classes">8.4.1. Collections Abstract Base Classes</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="heapq.html">8.5. <code class="docutils literal notranslate"><span class="pre">heapq</span></code> — 堆積佇列 (heap queue) 演算法</a><ul>
<li class="toctree-l2"><a class="reference internal" href="heapq.html#basic-examples">8.5.1. 基礎範例</a></li>
<li class="toctree-l2"><a class="reference internal" href="heapq.html#priority-queue-implementation-notes">8.5.2. 優先佇列 (Priority Queue) 實作細節</a></li>
<li class="toctree-l2"><a class="reference internal" href="heapq.html#theory">8.5.3. 原理</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="bisect.html">8.6. <code class="docutils literal notranslate"><span class="pre">bisect</span></code> — 陣列二分演算法 (Array bisection algorithm)</a><ul>
<li class="toctree-l2"><a class="reference internal" href="bisect.html#searching-sorted-lists">8.6.1. Searching Sorted Lists</a></li>
<li class="toctree-l2"><a class="reference internal" href="bisect.html#other-examples">8.6.2. Other Examples</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="array.html">8.7. <code class="docutils literal notranslate"><span class="pre">array</span></code> — 高效率的數值型態陣列</a></li>
<li class="toctree-l1"><a class="reference internal" href="weakref.html">8.8. <code class="docutils literal notranslate"><span class="pre">weakref</span></code> — Weak references</a><ul>
<li class="toctree-l2"><a class="reference internal" href="weakref.html#weak-reference-objects">8.8.1. Weak Reference Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="weakref.html#example">8.8.2. Example</a></li>
<li class="toctree-l2"><a class="reference internal" href="weakref.html#finalizer-objects">8.8.3. Finalizer Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="weakref.html#comparing-finalizers-with-del-methods">8.8.4. Comparing finalizers with <code class="docutils literal notranslate"><span class="pre">__del__()</span></code> methods</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="types.html">8.9. <code class="docutils literal notranslate"><span class="pre">types</span></code> — Dynamic type creation and names for built-in types</a><ul>
<li class="toctree-l2"><a class="reference internal" href="types.html#dynamic-type-creation">8.9.1. Dynamic Type Creation</a></li>
<li class="toctree-l2"><a class="reference internal" href="types.html#standard-interpreter-types">8.9.2. Standard Interpreter Types</a></li>
<li class="toctree-l2"><a class="reference internal" href="types.html#additional-utility-classes-and-functions">8.9.3. Additional Utility Classes and Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="types.html#coroutine-utility-functions">8.9.4. Coroutine Utility Functions</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="copy.html">8.10. <code class="docutils literal notranslate"><span class="pre">copy</span></code> — Shallow and deep copy operations</a></li>
<li class="toctree-l1"><a class="reference internal" href="pprint.html">8.11. <code class="docutils literal notranslate"><span class="pre">pprint</span></code> — Data pretty printer</a><ul>
<li class="toctree-l2"><a class="reference internal" href="pprint.html#prettyprinter-objects">8.11.1. PrettyPrinter Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="pprint.html#example">8.11.2. Example</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="reprlib.html">8.12. <code class="docutils literal notranslate"><span class="pre">reprlib</span></code> — Alternate <code class="docutils literal notranslate"><span class="pre">repr()</span></code> implementation</a><ul>
<li class="toctree-l2"><a class="reference internal" href="reprlib.html#repr-objects">8.12.1. Repr Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="reprlib.html#subclassing-repr-objects">8.12.2. Subclassing Repr Objects</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="enum.html">8.13. <code class="docutils literal notranslate"><span class="pre">enum</span></code> — Support for enumerations</a><ul>
<li class="toctree-l2"><a class="reference internal" href="enum.html#module-contents">8.13.1. Module Contents</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#creating-an-enum">8.13.2. Creating an Enum</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#programmatic-access-to-enumeration-members-and-their-attributes">8.13.3. Programmatic access to enumeration members and their attributes</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#duplicating-enum-members-and-values">8.13.4. Duplicating enum members and values</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#ensuring-unique-enumeration-values">8.13.5. Ensuring unique enumeration values</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#using-automatic-values">8.13.6. Using automatic values</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#iteration">8.13.7. Iteration</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#comparisons">8.13.8. Comparisons</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#allowed-members-and-attributes-of-enumerations">8.13.9. Allowed members and attributes of enumerations</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#restricted-subclassing-of-enumerations">8.13.10. Restricted subclassing of enumerations</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#pickling">8.13.11. Pickling</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#functional-api">8.13.12. Functional API</a></li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#derived-enumerations">8.13.13. Derived Enumerations</a><ul>
<li class="toctree-l3"><a class="reference internal" href="enum.html#intenum">8.13.13.1. IntEnum</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#intflag">8.13.13.2. IntFlag</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#flag">8.13.13.3. Flag</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#others">8.13.13.4. Others</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#interesting-examples">8.13.14. Interesting examples</a><ul>
<li class="toctree-l3"><a class="reference internal" href="enum.html#omitting-values">8.13.14.1. Omitting values</a><ul>
<li class="toctree-l4"><a class="reference internal" href="enum.html#using-auto">8.13.14.1.1. Using <code class="docutils literal notranslate"><span class="pre">auto</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#using-object">8.13.14.1.2. Using <code class="docutils literal notranslate"><span class="pre">object</span></code></a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#using-a-descriptive-string">8.13.14.1.3. Using a descriptive string</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#using-a-custom-new">8.13.14.1.4. Using a custom <code class="docutils literal notranslate"><span class="pre">__new__()</span></code></a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#orderedenum">8.13.14.2. OrderedEnum</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#duplicatefreeenum">8.13.14.3. DuplicateFreeEnum</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#planet">8.13.14.4. Planet</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#timeperiod">8.13.14.5. TimePeriod</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="enum.html#how-are-enums-different">8.13.15. How are Enums different?</a><ul>
<li class="toctree-l3"><a class="reference internal" href="enum.html#enum-classes">8.13.15.1. Enum Classes</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#enum-members-aka-instances">8.13.15.2. Enum Members (aka instances)</a></li>
<li class="toctree-l3"><a class="reference internal" href="enum.html#finer-points">8.13.15.3. Finer Points</a><ul>
<li class="toctree-l4"><a class="reference internal" href="enum.html#supported-dunder-names">8.13.15.3.1. Supported <code class="docutils literal notranslate"><span class="pre">__dunder__</span></code> names</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#supported-sunder-names">8.13.15.3.2. Supported <code class="docutils literal notranslate"><span class="pre">_sunder_</span></code> names</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#enum-member-type">8.13.15.3.3. <code class="docutils literal notranslate"><span class="pre">Enum</span></code> member type</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#boolean-value-of-enum-classes-and-members">8.13.15.3.4. Boolean value of <code class="docutils literal notranslate"><span class="pre">Enum</span></code> classes and members</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#enum-classes-with-methods">8.13.15.3.5. <code class="docutils literal notranslate"><span class="pre">Enum</span></code> classes with methods</a></li>
<li class="toctree-l4"><a class="reference internal" href="enum.html#combining-members-of-flag">8.13.15.3.6. Combining members of <code class="docutils literal notranslate"><span class="pre">Flag</span></code></a></li>
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