One single table extracted to be 7 separated tables

[RickVincent]

Describe the bug

A clear and concise description of what the bug is.
One single table extracted to be 7 separated tables

Have you tried repairing the PDF?

Yes
Please try running your code with pdfplumber.open(..., repair=True) before submitting a bug report.
Below is the log after run with repair=True:
Page 41 Table is [['公司或子\n公司名称', '主要污染物及特\n征污染物的名称', '排放\n方式', '排放口数量', '排放口分布情况', '排放浓度', '执行的污染物排放标准', '排放总\n量/t', '核定的排\n放总量t/a', '超 标排\n放情况'], ['万华化学\n集团股份\n有限公司', '二氧化硫', '连续', '130', '各生产装置区', '0.015mg/m3', '区域性大气污染物综合\n排放标准DB37/2376-\n2019,挥发性有机物排放\n标准第6部分:有机化工\n行业DB37/2801.6-2018,\n危险废物焚烧污染控制\n标准GB 18484-2020', '0.986', '361.732', '无'], [None, '氮氧化物', None, None, None, '5.88mg/m3', None, '53.47', '1431.337', None], [None, '颗粒物', None, None, None, '1.07mg/m3', None, '1.992', '208.729', None], [None, 'VOCs', None, None, None, '3.313mg/m3', None, '14.20', '1650.9864', None], ['万华化学\n集团环保\n科技有限\n公司', '氨氮', '连续', '2', '污水处理区域', '6.81mg/l', '污水排入城镇下水道水\n质标准GB/T 31962-\n2015,流域水污染物综合\n排放标准第5部分:半岛\n流域DB37/3416.5-2018', '12.3', '419.33', '无'], [None, 'COD', None, None, None, '61.7mg/l', None, '112.3', '4050.63', None], ['万华化学\n(宁波)有\n限公司', '二氧化硫', '连续', '31', '各生产装置区', '3.49mg/m3', '危险废物焚烧污染控制\n标准GB18484-2001，石\n油化学工业污染物排放\n标准GB31571-2015', '16.10', '43.28', '无'], [None, '氮氧化物', None, None, None, '40.75mg/m3', None, '81.44', '208.18', None], [None, '氨氮', None, None, None, '1.99mg/l', None, '3.78', '27.3', None], [None, 'COD', None, None, None, '81.06mg/l', None, '149.98', '165.4', None], ['万华化学\n（烟台）\n氯碱热电\n有限公司', '二氧化硫', '连续', '19', '界区东北', '16.6mg/m3', '《火电厂大气污染物排\n放标准(DB37/664—\n2019》、《大气污染物\n综合排放标准GB16297-\n1996》、《挥发性有机\n物排放标准 第7部分', '148.6', '759.89', '无'], [None, '氮氧化物', None, None, None, '40.1mg/m3', None, '360', '1183.2', None]]

Page 41 Table is [['公司或子'], ['公司名称']]

Page 41 Table is [['主要污染物及特'], ['征污染物的名称']]

Page 41 Table is [['排放'], ['方式']]

Page 41 Table is [['排放总'], ['量/t']]

Page 41 Table is [['核定的排'], ['放总量t/a']]

Page 41 Table is [['超标排'], ['放情况']]

Code to reproduce the problem

Paste it here, or attach a Python file.
import pdfplumber

REPORT_FILE = r'D:\Downloads\万华化学\万华化学.2021.年报.2022-03-15.pdf'
GS_PATH = r'D:\Downloads\Python\PDF\Ghostscript.10.04.0.x64\bin\gswin64.exe'

with pdfplumber.open(REPORT_FILE, gs_path = GS_PATH, repair = True) as pdf:
for page_num, page in enumerate(pdf.pages):
tables = page.extract_tables()

    if page_num < 38 or page_num > 43:
        continue

    for table_index, table in enumerate(tables):
        print(f'Page {page_num + 1} Table is {table}\n')

PDF file

Please attach any PDFs necessary to reproduce the problem.
万华化学.2021.年报.2022-03-15.pdf

If you need to redact text in a sensitive PDF, you can run it through JoshData/pdf-redactor.

Expected behavior

What did you expect the result should have been?

1. Recognite the single table in page 41 as single one

Actual behavior

What actually happened, instead?
But the table in page 41 recognited as 7 separated tables

Screenshots

If applicable, add screenshots to help explain your problem.

Environment

• pdfplumber version: [0.11.4]
• Python version: [3.13.1]
• OS: [Windows11 24H2 x64]

Additional context

Add any other context/notes about the problem here.
N/A. Thanks in advance!

[RickVincent]

`import pdfplumber

REPORT_FILE = r'D:\Downloads\万华化学\万华化学.2021.年报.2022-03-15.pdf'

GS_PATH = r'D:\Downloads\Python\PDF\Ghostscript.10.04.0.x64\bin\gswin64.exe'

with pdfplumber.open(REPORT_FILE, gs_path = GS_PATH, repair = True) as pdf:
for page_num, page in enumerate(pdf.pages):
tables = page.extract_tables()

    if page_num < 38 or page_num > 43:
        continue

    for table_index, table in enumerate(tables):
        print(f'Page {page_num + 1} Table is {table}\n')`

[jsvine]

Thank you for the details and for providing the PDF. Using the visual debugging tools:

import pdfplumber
pdf = pdfplumber.open("2021.2022-03-15.pdf")
page = pdf.pages[40]
im = page.to_image()
im

... produces this:

... which shows that there are invisible rectangles inside the headers that are creating problems. Using page.filter(...) seems to handle this well:

def test(obj):
  if obj["object_type"] == "rect":
    return obj["height"] < 5 or obj["width"] < 5
  return True

filtered = page.filter(test)
filtered.to_image().debug_tablefinder()

... and:

filtered.extract_tables()

[[['公司或子\n公司名称',
   '主要污染物及特\n征污染物的名称',
   '排放\n方式',
   '排放口数量',
   '排放口分布情况',
   '排放浓度',
   '执行的污染物排放标准',
   '排放总\n量/t',
   '核定的排\n放总量t/a',
   '超标排\n放情况'],
  ['万华化学\n集团股份\n有限公司',
   '二氧化硫',
   '连续',
   '130',
   '各生产装置区',
   '0.015mg/m3',
   '区域性大气污染物综合\n排放标准DB37/2376-\n2019,挥发性有机物排放\n标准第6部分:有机化工\n行业DB37/2801.6-2018,\n危险废物焚烧污染控制\n标准GB 18484-2020',
   '0.986',
   '361.732',
   '无'],
  [None,
   '氮氧化物',
   None,
   None,
   None,
   '5.88mg/m3',
   None,
   '53.47',
   '1431.337',
   None],
  [None, '颗粒物', None, None, None, '1.07mg/m3', None, '1.992', '208.729', None],
  [None,
   'VOCs',
   None,
   None,
   None,
   '3.313mg/m3',
   None,
   '14.20',
   '1650.9864',
   None],
  ['万华化学\n集团环保\n科技有限\n公司',
   '氨氮',
   '连续',
   '2',
   '污水处理区域',
   '6.81mg/l',
   '污水排入城镇下水道水\n质标准GB/T 31962-\n2015,流域水污染物综合\n排放标准第5部分:半岛\n流域DB37/3416.5-2018',
   '12.3',
   '419.33',
   '无'],
  [None, 'COD', None, None, None, '61.7mg/l', None, '112.3', '4050.63', None],
  ['万华化学\n(宁波)有\n限公司',
   '二氧化硫',
   '连续',
   '31',
   '各生产装置区',
   '3.49mg/m3',
   '危险废物焚烧污染控制\n标准GB18484-2001，石\n油化学工业污染物排放\n标准GB31571-2015',
   '16.10',
   '43.28',
   '无'],
  [None,
   '氮氧化物',
   None,
   None,
   None,
   '40.75mg/m3',
   None,
   '81.44',
   '208.18',
   None],
  [None, '氨氮', None, None, None, '1.99mg/l', None, '3.78', '27.3', None],
  [None, 'COD', None, None, None, '81.06mg/l', None, '149.98', '165.4', None],
  ['万华化学\n（烟台）\n氯碱热电\n有限公司',
   '二氧化硫',
   '连续',
   '19',
   '界区东北',
   '16.6mg/m3',
   '《火电厂大气污染物排\n放标准(DB37/664—\n2019》、《大气污染物\n综合排放标准GB16297-\n1996》、《挥发性有机\n物排放标准 第7部分',
   '148.6',
   '759.89',
   '无'],
  [None, '氮氧化物', None, None, None, '40.1mg/m3', None, '360', '1183.2', None]]]

[RickVincent]

@jsvine Thanks so much for prompt response and feedback! The approach works fine on the file. Appreciate! Really amazing...