PDFPlumber：从PDF文件提取文字和表格的Python库.pdf

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4/21/2020 PDFPlumberPDFPython - Python | CTOLib

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53 

2061

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v0.5.15

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 > Python> 

PDFPlumberPDFPython

Plumb a PDF for detailed information about each char, rectangle, line, et cetera —and easily extract text and tables.

 





Plumb a PDF for detailed information about each text character, rectangle, and line. Plus: Table extraction and visual

debugging.

Works best on machine-generated, rather than scanned, PDFs. Built on pdfminer and pdfminer.six.

Currently tested on Python 2.7, 3.1, 3.4, 3.5, and 3.6.

Installation

Command line interface

Python library

Visual debugging

Extracting tables

Extracting form values

Demonstrations

Acknowledgments / Contributors

Contributing

pip install pdfplumber

To use pdfplumber's visual-debugging tools, you'll also need to have ImageMagick installed on your computer. Installation

instructions here.

curl "https://cdn.rawgit.com/jsvine/pdfplumber/master/examples/pdfs/background-checks.pdf" > background-checks.pdf

pdfplumber < background-checks.pdf > background-checks.csv

The output will be a CSV containing info about every character, line, and rectangle in the PDF.

Argument Description

Go beyond APM

The all-in-one software

intelligence platform.

Dynatrace

PDFPlumber v0.5.13

Table of Contents

Installation

Command line interface

Basic example

Options

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--format [format] csv or json. The json format returns slightly more information; it includes PDF-level metadata

and height/width information about each page.

--pages [list of pages]

A space-delimited, 1-indexed list of pages or hyphenated page ranges. E.g., 1, 11-15, which

would return data for pages 1, 11, 12, 13, 14, and 15.

--types [list of object

types to extract]

Choices are char, anno, line, curve, rect, rect_edge. Defaults to char, anno, line, curve, rect.

import pdfplumber

with pdfplumber.open("path/to/ﬁle.pdf") as pdf:

ﬁrst_page = pdf.pages[0]

print(ﬁrst_page.chars[0])

pdfplumber provides two main ways to load a PDF:

pdfplumber.open("path/to/ﬁle.pdf")

pdfplumber.load(ﬁle_like_object)

Both methods return an instance of the pdfplumber.PDF class.

To load a password-protected PDF, pass the password keyword argument, e.g., pdfplumber.open("ﬁle.pdf", password =

"test").

The top-level pdfplumber.PDF class represents a single PDF and has two main properties:

Property Description

.metadata

A dictionary of metadata key/value pairs, drawn from the PDF's Info trailers. Typically includes

"CreationDate," "ModDate," "Producer," et cetera.

.pages A list containing one pdfplumber.Page instance per page loaded.

The pdfplumber.Page class is at the core of pdfplumber. Most things you'll do with pdfplumber will revolve around this class.

It has these main properties:

Property Description

.page_number The sequential page number, starting with 1 for the ﬁrst page, 2 for the second, and so on.

.width The page's width.

.height The page's height.

.objects / .chars /

.lines / .rects

Each of these properties is a list, and each list contains one dictionary for each such object

embedded on the page. For more detail, see "Objects" below.

... and these main methods:

Method Description

Python library

Basic example

Loading a PDF

The pdfplumber.PDF class

The pdfplumber.Page class

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.crop(bounding_box) Returns a version of the page cropped to the bounding box, which should be

expressed as 4-tuple with the values (x0, top, x1, bottom). Cropped pages retain

objects that fall at least partly within the bounding box. If an object falls only partly

within the box, its dimensions are sliced to ﬁt the bounding box.

.within_bbox(bounding_box) Similar to .crop, but only retains objects that fall entirely within the bounding box.

.ﬁlter(test_function)

Returns a version of the page with only the .objects for which test_function(obj)

returns True.

.extract_text(x_tolerance=0,

y_tolerance=0)

Collates all of the page's character objects into a single string. Adds spaces where

the diﬀerence between the x1 of one character and the x0 of the next is greater

than x_tolerance. Adds newline characters where the diﬀerence between the doctop

of one character and the doctop of the next is greater than y_tolerance.

.extract_words(x_tolerance=0,

y_tolerance=0)

Returns a list of all word-looking things and their bounding boxes. Words are

considered to be sequences of characters where the diﬀerence between the x1 of

one character and the x0 of the next is less than or equal to x_tolerance and where

the doctop of one character and the doctop of the next is less than or equal to

y_tolerance.

.extract_tables(table_settings) Extracts tabular data from the page. For more details see "Extracting tables" below.

.to_image(**conversion_kwargs)

Returns an instance of the PageImage class. For more details, see "Visual debugging"

below. For conversion_kwargs, see here.

Each instance of pdfplumber.PDF and pdfplumber.Page provides access to four types of PDF objects. The following

properties each return a Python list of the matching objects:

.chars, each representing a single text character.

.annos, each representing a single annotation-text character.

.lines, each representing a single 1-dimensional line.

.rects, each representing a single 2-dimensional rectangle.

.curves, each representing a series of connected points.

Each object is represented as a simple Python dict, with the following properties:

Property Description

page_number Page number on which this character was found.

text E.g., "z", or "Z" or " ".

fontname Name of the character's font face.

size Font size.

adv Equal to text width * the font size * scaling factor.

upright Whether the character is upright.

height Height of the character.

width Width of the character.

x0 Distance of left side of character from left side of page.

x1 Distance of right side of character from left side of page.

Objects

char / anno properties

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2022-02-02

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PDFPlumber：从PDF文件提取文字和表格的Python库.pdf

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