head_style = self.workbook.add_format({"bold": True, "bg_color": "yellow", "align": "center", "font": 13}

head_style = self.workbook.add_format({"bold": True, "bg_color": "yellow", "align": "center", "font": 13}) 这段代码是用于设置Excel表格的样式。通过调用`self.workbook.add_format()`方法创建一个格式对象，然后通过传入一个字典参数来设置该格式对象的属性。在这个字典中，"bold"属性被设置为True，表示文本加粗；"bg_color"属性被设置为"yellow"，表示背景颜色为黄色；align"属性被设置为"center"，表示文本居中对齐；"font"属性被设置为13，表示字体大小为13。因此，head_style就是一个具有指定样式的格式对象。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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