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            <h1 id="seo-header">面向对象的尝试</h1>
            
            
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                <figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span 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InvalidOperation<br><span class="hljs-keyword">from</span> itertools <span class="hljs-keyword">import</span> chain<br><br>TABLE_COLUMN = <span class="hljs-number">13</span><br><br>sep = re.<span class="hljs-built_in">compile</span>(<span class="hljs-string">r&#x27;\s+&#x27;</span>)<span class="hljs-comment">#表明分隔符是至少一个空白符</span><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">_sep</span>(<span class="hljs-params">s</span>):<br>    s = sep.sub(<span class="hljs-string">&#x27; &#x27;</span>, s).strip()<span class="hljs-comment">#分隔符转为一个空格后去掉首位的空格</span><br>    <span class="hljs-keyword">return</span> s.split(<span class="hljs-string">&#x27; &#x27;</span>)<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">_path</span>(<span class="hljs-params">name, root=<span class="hljs-literal">None</span></span>):<br>    <span class="hljs-keyword">return</span> os.path.join(root <span class="hljs-keyword">or</span> os.getcwd(),name)<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">_getStrIncreasedWidth</span>(<span class="hljs-params">s</span>):<br>    <span class="hljs-string">&#x27;&#x27;&#x27;</span><br><span class="hljs-string">    大致计算以空格 为单位时字串增加的宽度　</span><br><span class="hljs-string">    &#x27;&#x27;&#x27;</span><br>    <span class="hljs-keyword">return</span> <span class="hljs-built_in">sum</span>(<span class="hljs-built_in">ord</span>(c) &gt; <span class="hljs-number">127</span> <span class="hljs-keyword">for</span> c <span class="hljs-keyword">in</span> s)<span class="hljs-comment">#历遍字串，统计非ASCII字符的数目</span><br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">_sort</span>(<span class="hljs-params">s</span>):<span class="hljs-comment">#由于文本形式的数字大小比较和实际的数字大小比较不一致所以需要将数字转到Deciaml</span><br>    <span class="hljs-keyword">try</span>:<br>        <span class="hljs-keyword">return</span> Decimal(s)<br>    <span class="hljs-keyword">except</span> InvalidOperation:<br>        <span class="hljs-keyword">return</span> s<br><span class="hljs-keyword">def</span> <span class="hljs-title function_">_key</span>(<span class="hljs-params">key</span>):<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">wrapKey</span>(<span class="hljs-params">*args, **kw</span>):<span class="hljs-comment">#对key进行修饰,在外面套一层_sort</span><br>        <span class="hljs-keyword">return</span> _sort(key(*args, **kw))<br>    <span class="hljs-keyword">return</span> wrapKey<br><br><span class="hljs-keyword">class</span> <span class="hljs-title class_">Table</span>(<span class="hljs-title class_ inherited__">list</span>):<span class="hljs-comment">#表格对象继承自列表</span><br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">addLine</span>(<span class="hljs-params">self, line</span>):<br>        self.append(<span class="hljs-built_in">list</span>(line))<br>        <span class="hljs-keyword">for</span> index <span class="hljs-keyword">in</span> <span class="hljs-built_in">range</span>(self.column):<br>            column_width = <span class="hljs-built_in">len</span>(line[index]) + _getStrIncreasedWidth(line[index])<span class="hljs-comment">#获取添加项的宽度</span><br>            self.column_width[index] = <span class="hljs-built_in">max</span>(self.column_width[index], column_width)<span class="hljs-comment">#该列始终保持为最大的宽度。</span><br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">addLines</span>(<span class="hljs-params">self, data</span>):<br>        self.extend((<span class="hljs-built_in">list</span>(x) <span class="hljs-keyword">for</span> x <span class="hljs-keyword">in</span> data))<br>        <span class="hljs-keyword">for</span> index <span class="hljs-keyword">in</span> <span class="hljs-built_in">range</span>(self.column):<br>            max_column_width = <span class="hljs-built_in">max</span>(<span class="hljs-built_in">map</span>(<span class="hljs-keyword">lambda</span> line:<span class="hljs-built_in">len</span>(line[index]) + _getStrIncreasedWidth(line[index]), data))<br>            self.column_width[index] = <span class="hljs-built_in">max</span>(self.column_width[index], max_column_width)<span class="hljs-comment">#更新表格该列宽度为最大宽度</span><br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">getPrint</span>(<span class="hljs-params">self</span>):<br>        <span class="hljs-keyword">def</span> <span class="hljs-title function_">formatLine</span>(<span class="hljs-params">line</span>):<br>            items = (<span class="hljs-string">f&#x27;<span class="hljs-subst">&#123;item:^&#123;self.column_width[i]-_getStrIncreasedWidth(item)&#125;</span>&#125;&#x27;</span> <span class="hljs-keyword">for</span> i,item <span class="hljs-keyword">in</span> <span class="hljs-built_in">enumerate</span>(line))<br>            <span class="hljs-keyword">return</span> <span class="hljs-string">&#x27;\t&#x27;</span>.join(items)<br>        <span class="hljs-keyword">return</span> <span class="hljs-string">&#x27;\n&#x27;</span>.join(<span class="hljs-built_in">map</span>(formatLine, chain([self.structure], self)))<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">__init__</span>(<span class="hljs-params">self, structure, equivalent_field=<span class="hljs-literal">None</span></span>):<br>        self.structure = <span class="hljs-built_in">list</span>(structure)<br>        self.column = <span class="hljs-built_in">len</span>(structure)<br>        self.column_width = <span class="hljs-built_in">list</span>(<span class="hljs-built_in">map</span>(<span class="hljs-keyword">lambda</span> x:<span class="hljs-built_in">len</span>(x) + _getStrIncreasedWidth(x), structure))<br>        self.equivalent_field = equivalent_field <span class="hljs-keyword">if</span> equivalent_field <span class="hljs-keyword">else</span> &#123;&#125;<br>    __repr__ = __str__ = getPrint<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">getColumn</span>(<span class="hljs-params">self, index</span>):<br>        <span class="hljs-keyword">return</span> [line[index] <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> self]<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">addEquivalentField</span>(<span class="hljs-params">self, equivalent_field</span>):<br>        self.equivalent_field.update(equivalent_field)<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">getFiledName</span>(<span class="hljs-params">self, field</span>):<br>        <span class="hljs-keyword">return</span> self.equivalent_field.get(field, field)<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">indexField</span>(<span class="hljs-params">self, key</span>):<br>        <span class="hljs-keyword">if</span> <span class="hljs-built_in">callable</span>(key):<br>            <span class="hljs-keyword">return</span> [i <span class="hljs-keyword">for</span> i,_field <span class="hljs-keyword">in</span> <span class="hljs-built_in">enumerate</span>(self.structure) <span class="hljs-keyword">if</span> key(_field)]<br>        <span class="hljs-keyword">else</span>:<br>            field = self.getFiledName(key)<br>            <span class="hljs-keyword">return</span> [i <span class="hljs-keyword">for</span> i,_field <span class="hljs-keyword">in</span> <span class="hljs-built_in">enumerate</span>(self.structure) <span class="hljs-keyword">if</span> field == _field]<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">filter</span>(<span class="hljs-params">self, index, key</span>):<br>        table = Table(self.structure, self.equivalent_field)<br>        <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> self:<br>            <span class="hljs-keyword">if</span> key(line[index]):<br>                table.addLine(line)<br>        <span class="hljs-keyword">return</span> table<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">filterField</span>(<span class="hljs-params">self, indexList</span>):<br>        table = Table([self.structure[index] <span class="hljs-keyword">for</span> index <span class="hljs-keyword">in</span> indexList], self.equivalent_field)<br>        <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> self:<br>            table.addLine([line[index] <span class="hljs-keyword">for</span> index <span class="hljs-keyword">in</span> indexList])<br>        <span class="hljs-keyword">return</span> table <br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">addColumn</span>(<span class="hljs-params">self, field_name, key, index=<span class="hljs-literal">None</span></span>):<br>        <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> index:<br>            index = self.column<br>        self.structure.insert(index, field_name)<span class="hljs-comment">#更新结构</span><br>        self.column_width.insert(index, <span class="hljs-built_in">len</span>(field_name) + _getStrIncreasedWidth(field_name))<span class="hljs-comment">#例行维护</span><br>        self.column += <span class="hljs-number">1</span><br>        <span class="hljs-keyword">for</span> x,line <span class="hljs-keyword">in</span> <span class="hljs-built_in">enumerate</span>(self):<br>            item = key(self, x, index)<span class="hljs-comment">#调用生成函数key来生成要添加的值</span><br>            line.insert(index, item)<br>            self.column_width[index] = <span class="hljs-built_in">max</span>(self.column_width[index], <span class="hljs-built_in">len</span>(item) + _getStrIncreasedWidth(item))<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">sort</span>(<span class="hljs-params">self, key, reverse=<span class="hljs-literal">False</span></span>):<br>        <span class="hljs-keyword">try</span>:<br>            <span class="hljs-built_in">list</span>.sort(self, key=_key(key), reverse=reverse)<br>        <span class="hljs-keyword">except</span> TypeError:<span class="hljs-comment">#如果同时有数字和汉字会出错,这时回到最初的排序方式</span><br>            <span class="hljs-built_in">list</span>.sort(self, key=key, reverse=reverse)<br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">__getitem__</span>(<span class="hljs-params">self, n</span>):<br>        <span class="hljs-keyword">if</span> <span class="hljs-built_in">isinstance</span>(n, <span class="hljs-built_in">int</span>):<span class="hljs-comment"># n是索引</span><br>            <span class="hljs-keyword">return</span> <span class="hljs-built_in">list</span>.__getitem__(self, n)<br>        <span class="hljs-keyword">else</span>:<span class="hljs-comment"># n是切片</span><br>            table = Table(self.structure, self.equivalent_field)<br>            table.addLines(<span class="hljs-built_in">list</span>.__getitem__(self, n))<br>            <span class="hljs-keyword">return</span> table<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">pretreat</span>():<br>    <span class="hljs-string">&#x27;&#x27;&#x27;</span><br><span class="hljs-string">    文件内容预处理：</span><br><span class="hljs-string">    把数据文件stocks.txt中的箭头和逗号去除，</span><br><span class="hljs-string">    把x%转换为x/100，</span><br><span class="hljs-string">    去除掉最后一列（“股吧”），</span><br><span class="hljs-string">    去除掉数字前面的+。</span><br><span class="hljs-string">    在同一个目录下生成新的文件stockdata.txt</span><br><span class="hljs-string">    &#x27;&#x27;&#x27;</span><br>    TABLE_STRUCTURE = re.<span class="hljs-built_in">compile</span>(<span class="hljs-string">r&#x27;([\w/]&#123;2,&#125;)[\t ]+&#x27;</span>)<br>    TABLE_DATA = re.<span class="hljs-built_in">compile</span>(<span class="hljs-string">r&#x27;^((?:(?:SH)?[69](?:SZ)?[02](?:HK)?)0\d&#123;4&#125;)\s+(\S+)\s+[↑↓]?(\S+)\s+\+?(\S+)\s+\+?(\S+)%\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+股吧&#x27;</span>,flags=re.IGNORECASE)<br>    <span class="hljs-keyword">with</span> <span class="hljs-built_in">open</span>(_path(<span class="hljs-string">r&#x27;stocks.txt&#x27;</span>), encoding=<span class="hljs-string">&#x27;utf-8&#x27;</span>) <span class="hljs-keyword">as</span> stocks:<br>        structure = TABLE_STRUCTURE.findall(stocks.readline())<br>        <span class="hljs-keyword">if</span> <span class="hljs-built_in">len</span>(structure) != TABLE_COLUMN:<br>            <span class="hljs-keyword">return</span> <span class="hljs-string">&#x27;stocks.txt格式有误, 请确认表头是否复制完全!&#x27;</span><br>        table = Table(structure)<br>        hundred = Decimal(<span class="hljs-string">&#x27;100&#x27;</span>)<br>        <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> stocks:<br>            line = TABLE_DATA.findall(line.replace(<span class="hljs-string">&#x27;,&#x27;</span>,<span class="hljs-string">&#x27;&#x27;</span>))<br>            <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> line <span class="hljs-keyword">or</span> <span class="hljs-built_in">len</span>(line[<span class="hljs-number">0</span>]) != TABLE_COLUMN:<br>                <span class="hljs-keyword">return</span> <span class="hljs-string">f&#x27;stocks.txt格式有误, 请确认第<span class="hljs-subst">&#123;<span class="hljs-built_in">len</span>(table)+<span class="hljs-number">2</span>&#125;</span>行的数据是否复制完全!&#x27;</span><br>            line = <span class="hljs-built_in">list</span>(line[<span class="hljs-number">0</span>])<span class="hljs-comment">#转成list是因为tuple不支持元素的修改</span><br>            line[<span class="hljs-number">4</span>] = <span class="hljs-built_in">str</span>(Decimal(line[<span class="hljs-number">4</span>]) / hundred)<br>            table.addLine(line)<br>    <span class="hljs-keyword">with</span> <span class="hljs-built_in">open</span>(_path(<span class="hljs-string">r&#x27;stockdata.txt&#x27;</span>), <span class="hljs-string">&#x27;w&#x27;</span>, encoding=<span class="hljs-string">&#x27;utf-8&#x27;</span>) <span class="hljs-keyword">as</span> stockdata:<br>        stockdata.write(table.getPrint())<br>    <span class="hljs-keyword">return</span> table<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">readTable</span>():<br>    <span class="hljs-string">&#x27;&#x27;&#x27;</span><br><span class="hljs-string">    读入处理后的stockdata.txt文件</span><br><span class="hljs-string">    &#x27;&#x27;&#x27;</span><br>    <span class="hljs-keyword">with</span> <span class="hljs-built_in">open</span>(_path(<span class="hljs-string">r&#x27;stockdata.txt&#x27;</span>), encoding=<span class="hljs-string">&#x27;utf-8&#x27;</span>) <span class="hljs-keyword">as</span> stockdata:<br>        table = Table(_sep(stockdata.readline()))<span class="hljs-comment">#先读入表头</span><br>        <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> stockdata:<br>            table.addLine(_sep(line))<span class="hljs-comment">#再分行读入数据</span><br>    <span class="hljs-keyword">return</span> table<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">search</span>(<span class="hljs-params">table</span>):<br>    <span class="hljs-string">&#x27;&#x27;&#x27;</span><br><span class="hljs-string">    输入以空格隔开的若干个股票名称S，S如果没有输入，则默认为所有股票。</span><br><span class="hljs-string">    输入以空格隔开的若干个字段名T，T如果没有输入，则默认为”代码”。</span><br><span class="hljs-string">    输入一个要排序的字段名name（该字段必须在T中），</span><br><span class="hljs-string">    输入排序方式（升序、降序）。其中排序方式默认为升序。</span><br><span class="hljs-string">    根据这些条件，检索文件中符合条件的股票，并显示T字段名称及相应的内容。</span><br><span class="hljs-string">    前两个字段名不管有没有出现在T中，都要输出显示。</span><br><span class="hljs-string">    &#x27;&#x27;&#x27;</span><br>    S = <span class="hljs-built_in">input</span>(<span class="hljs-string">&#x27;请输入以空格隔开的若干个股票名称S:&#x27;</span>).strip()<br>    <span class="hljs-keyword">if</span> S:<span class="hljs-comment">#如果S是有意义的输入就进行筛选</span><br>        S = _sep(S)<br>        temp_table = table.<span class="hljs-built_in">filter</span>(table.indexField(<span class="hljs-string">&#x27;名称&#x27;</span>)[<span class="hljs-number">0</span>], <span class="hljs-keyword">lambda</span> x:x <span class="hljs-keyword">in</span> S)<br>        <span class="hljs-keyword">if</span> <span class="hljs-built_in">len</span>(temp_table) &gt; <span class="hljs-number">0</span>:<br>            table = temp_table<br>    T = <span class="hljs-built_in">input</span>(<span class="hljs-string">&#x27;请输入以空格隔开的若干个字段名T:&#x27;</span>).strip()<br>    <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> T:<span class="hljs-comment">#默认为”代码”</span><br>        T = <span class="hljs-string">&#x27;代码&#x27;</span><br>    T = <span class="hljs-built_in">set</span>(table.getFiledName(field) <span class="hljs-keyword">for</span> field <span class="hljs-keyword">in</span> _sep(T))<br>    T.update(&#123;<span class="hljs-string">&#x27;代码&#x27;</span>,<span class="hljs-string">&#x27;名称&#x27;</span>&#125;)<span class="hljs-comment">#前两个字段名不管有没有出现在T中，都要输出显示</span><br>    table = table.filterField(table.indexField(<span class="hljs-keyword">lambda</span> x: x <span class="hljs-keyword">in</span> T))<br>    name = <span class="hljs-built_in">input</span>(<span class="hljs-string">&#x27;请输入一个要排序的字段名name（该字段必须在T中）:&#x27;</span>).strip()<br>    <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> name:<span class="hljs-comment">#默认为”代码”</span><br>        name = <span class="hljs-string">&#x27;代码&#x27;</span><br>    name = table.getFiledName(name)<br>    <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> name <span class="hljs-keyword">in</span> T:<span class="hljs-comment">#该字段必须在T中</span><br>        <span class="hljs-keyword">return</span> <span class="hljs-string">f&#x27;排序的字段 <span class="hljs-subst">&#123;name&#125;</span> 必须在T中!&#x27;</span><br>    sort_index = table.indexField(name)<br>    <span class="hljs-keyword">if</span> <span class="hljs-built_in">len</span>(sort_index) != <span class="hljs-number">1</span>:<br>        <span class="hljs-keyword">return</span> <span class="hljs-string">&#x27;name 和 T 输入错误!&#x27;</span><br>    sort_index = sort_index[<span class="hljs-number">0</span>]<span class="hljs-comment">#如果输入没问题，就将以name所在的第一个字段进行排序</span><br>    reverse = <span class="hljs-built_in">input</span>(<span class="hljs-string">&#x27;请输入排序方式（升序、降序）:&#x27;</span>).strip()<br>    <span class="hljs-keyword">if</span> reverse == <span class="hljs-string">&#x27;降序&#x27;</span>:<span class="hljs-comment">#默认为升序</span><br>        reverse = <span class="hljs-literal">True</span><br>    <span class="hljs-keyword">else</span>:<br>        reverse = <span class="hljs-literal">False</span><br>    table.sort(key=<span class="hljs-keyword">lambda</span> x:x[sort_index], reverse=reverse)<br>    <span class="hljs-keyword">return</span> table<br><br><span class="hljs-keyword">def</span> <span class="hljs-title function_">volatilityAnalysis</span>(<span class="hljs-params">table</span>):<br>    <span class="hljs-string">&#x27;&#x27;&#x27;</span><br><span class="hljs-string">    根据“最高”和“最低”两个字段，</span><br><span class="hljs-string">    计算波动率=（最高-最低）/最低，</span><br><span class="hljs-string">    列出波动率最大的前三个股票代码、名称、波动率。</span><br><span class="hljs-string">    &#x27;&#x27;&#x27;</span><br>    table = table.<span class="hljs-built_in">filter</span>(table.indexField(<span class="hljs-string">&#x27;最低&#x27;</span>)[<span class="hljs-number">0</span>], <span class="hljs-built_in">eval</span>)<span class="hljs-comment">#除去最低为0的股票</span><br>    index_sup = table.indexField(<span class="hljs-string">&#x27;最高&#x27;</span>)[<span class="hljs-number">0</span>]<span class="hljs-comment">#获得“最高”字段所在位置</span><br>    index_inf = table.indexField(<span class="hljs-string">&#x27;最低&#x27;</span>)[<span class="hljs-number">0</span>]<span class="hljs-comment">#获得“最低”字段所在位置</span><br>    <span class="hljs-keyword">def</span> <span class="hljs-title function_">_analysis</span>(<span class="hljs-params">table, x, y</span>):<br>        sup = Decimal(table[x][index_sup])<span class="hljs-comment">#获得当前行的“最高”字段的值</span><br>        inf = Decimal(table[x][index_inf])<span class="hljs-comment">#获得当前行的“最低”字段的值</span><br>        <span class="hljs-keyword">return</span> <span class="hljs-string">f&#x27;<span class="hljs-subst">&#123;(sup-inf)/inf:<span class="hljs-number">.5</span>&#125;</span>&#x27;</span><span class="hljs-comment">#按公式计算，并且结果保留5位有效数字</span><br>    table.addColumn(<span class="hljs-string">&#x27;波动率&#x27;</span>, _analysis)<span class="hljs-comment">#使用公式生成波动率字段添加到表格最后一列</span><br>    T = &#123;<span class="hljs-string">&#x27;代码&#x27;</span>, <span class="hljs-string">&#x27;名称&#x27;</span>, <span class="hljs-string">&#x27;波动率&#x27;</span>&#125;<span class="hljs-comment">#只保留代码、名称、和波动率三个字段</span><br>    table = table.filterField(table.indexField(<span class="hljs-keyword">lambda</span> x: x <span class="hljs-keyword">in</span> T))<br>    sort_index = table.indexField(<span class="hljs-string">&#x27;波动率&#x27;</span>)[<span class="hljs-number">0</span>]<span class="hljs-comment">#对波动率进行降序排列</span><br>    table.sort(key=<span class="hljs-keyword">lambda</span> x:x[sort_index], reverse=<span class="hljs-literal">True</span>)<br>    <span class="hljs-keyword">return</span> table<br><br><span class="hljs-keyword">if</span> os.path.exists(_path(<span class="hljs-string">r&#x27;stockdata.txt&#x27;</span>)):<span class="hljs-comment">#如果数据已经处理就直接读入，否则进行预处理</span><br>    table = readTable()<br><span class="hljs-keyword">else</span>:<br>    table = pretreat()<br>    <span class="hljs-keyword">assert</span> <span class="hljs-built_in">isinstance</span>(table, Table), table <span class="hljs-comment">#如果stocks.txt格式有误，就提示错误信息，并终止运行</span><br>table.addEquivalentField(&#123;<span class="hljs-string">&#x27;成交量&#x27;</span>:<span class="hljs-string">&#x27;成交量/手&#x27;</span>, <span class="hljs-string">&#x27;成交额&#x27;</span>:<span class="hljs-string">&#x27;成交额/万&#x27;</span>&#125;)<span class="hljs-comment">#为表格字段添加别名</span><br><br><span class="hljs-built_in">print</span>(<span class="hljs-string">&#x27;\n搜索结果如下:&#x27;</span>, search(table), sep=<span class="hljs-string">&#x27;\n&#x27;</span>)<span class="hljs-comment">#检索前面读入的表格，并打印检索结果所形成的新表格</span><br><br></code></pre></td></tr></table></figure>
                
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