问PyMuPDF -如何在python中使用PyMuPDF从非结构化PDF中提取数据？

EN

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AttributeError                            Traceback (most recent call last)
<ipython-input-2-7f394b979351> in <module>
      1 first_annots=[]
      2 
----> 3 rec=page1.first_annot.rect
      4 
      5 rec

AttributeError: 'NoneType' object has no attribute 'rect'

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import fitz
import pandas as pd 
doc = fitz.open('Mansfield--70-21009048 - ConvertToExcel.pdf')
page1 = doc[0]
words = page1.get_text("words")
words[0]

first_annots=[]

rec=page1.first_annot.rect

rec

#Information of words in first object is stored in mywords

mywords = [w for w in words if fitz.Rect(w[:4]) in rec]

ann= make_text(mywords)

first_annots.append(ann)

def make_text(words):

    line_dict = {} 

    words.sort(key=lambda w: w[0])

    for w in words:  

        y1 = round(w[3], 1)  

        word = w[4] 

        line = line_dict.get(y1, [])  

        line.append(word)  

        line_dict[y1] = line  

    lines = list(line_dict.items())

    lines.sort()  

    return "n".join([" ".join(line[1]) for line in lines])

print(rec)
print(first_annots)