为什么我在使用 Tabula 时会得到一个空的数据框？

Question

我有以下代码：

df = tabula.read_pdf(r'C:\Users\Max12\Desktop\xml\pdfminer\attachments\Factuur 78692661.PDF', area=[375,7,76,558], pages = 1)
df1 = pd.DataFrame.from_records(df)
print(df1)

应该根据附件找到。我怎么找不到这张桌子？

请参阅附件以供参考。

Measurements

Jupyter notebook

Answer 1

问题出在代码中提到的area参数上。

根据Tabula Documentation，面积参数必须提到如下：

area (list of float, list of list of float, optional) –
Portion of the page to analyze(top,left,bottom,right). Default is entire page.

假设你需要从页面中间提取数据，那么参考上面的参数：

top == distance between **starting** of your desired data from the top of the page
left == distance between **starting** of your desired data from the left of the page
bottom == distance between **ending** of your desired data from the top of the page
right == distance between **ending** of your desired data from the left of the page

因此，区域参数列表中的第一个值必须小于第三个值。 同样，区域参数列表中的第二个值必须小于第四个值。

只有这样，tabula 才能通过给定的坐标创建表格。