PDFPlumber v0.5.11

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.

Table of Contents

• Installation
• Command line interface
• Python library
• Visual debugging
• Extracting tables
• Demonstrations
• Acknowledgments / Contributors
• Contributing

Installation

pip install pdfplumber

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

Command line interface

Basic example

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.

Options

Argument	Description
--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.

Python library

Basic example

import pdfplumber

with pdfplumber.open("path/to/file.pdf") as pdf:
    first_page = pdf.pages[0]
    print(first_page.chars[0])

Loading a PDF

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.

The pdfplumber.PDF class

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

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
.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.

Objects

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:

char / anno 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.
y0	Distance of bottom of character from bottom of page.
y1	Distance of top of character from bottom of page.
top	Distance of top of character from top of page.
bottom	Distance of bottom of the character from top of page.
doctop	Distance of top of character from top of document.
object_type	"char" / "anno"

line properties

Property	Description
page_number	Page number on which this line was found.
height	Height of line.
width	Width of line.
x0	Distance of left-side extremity from left side of page.
x1	Distance of right-side extremity from left side of page.
y0	Distance of bottom extremity from bottom of page.
y1	Distance of top extremity bottom of page.
top	Distance of top of line from top of page.
bottom	Distance of bottom of the line from top of page.
doctop	Distance of top of line from top of document.
linewidth	Thickness of line.
object_type	"line"

rect properties

Property	Description
page_number	Page number on which this rectangle was found.
height	Height of rectangle.
width	Width of rectangle.
x0	Distance of left side of rectangle from left side of page.
x1	Distance of right side of rectangle from left side of page.
y0	Distance of bottom of rectangle from bottom of page.
y1	Distance of top of rectangle from bottom of page.
top	Distance of top of rectangle from top of page.
bottom	Distance of bottom of the rectangle from top of page.
doctop	Distance of top of rectangle from top of document.
linewidth	Thickness of line.
object_type	"rect"

curve properties

Property	Description
page_number	Page number on which this curve was found.
points	Points — as a list of (x, top) tuples — describing the curve.
height	Height of curve's bounding box.
width	Width of curve's bounding box.
x0	Distance of curve's left-most point from left side of page.
x1	Distance of curve's right-most point from left side of the page.
y0	Distance of curve's lowest point from bottom of page.
y1	Distance of curve's highest point from bottom of page.
top	Distance of curve's highest point from top of page.
bottom	Distance of curve's lowest point from top of page.
doctop	Distance of curve's highest point from top of document.
linewidth	Thickness of line.
object_type	"curve"

Additionally, both pdfplumber.PDF and pdfplumber.Page provide access to two derived lists of objects: .rect_edges (which decomposes each rectangle into its four lines) and .edges (which combines .rect_edges with .lines).

Visual debugging

Creating a PageImage with .to_image()

To turn any page (including cropped pages) into an PageImage object, call my_page.to_image(). You can optionally pass a resolution={integer} keyword argument, which defaults to 72. E.g.:

im = my_pdf.page[0].to_image(resolution=150)

PageImage objects play nicely with IPython/Jupyter notebooks; they automatically render as cell outputs. For example:

Basic PageImage methods

Method	Description
im.reset()	Clears anything you've drawn so far.
im.copy()	Copies the image to a new PageImage object.
im.save(path_or_fileobject, format="PNG")	Saves the annotated image.

Drawing methods

You can pass explicit coordinates or any pdfplumber PDF object (e.g., char, line, rect) to these methods.

Single-object method	Bulk method	Description
im.draw_line(line, stroke={color}, stroke_width=1)	im.draw_lines(list_of_lines, **kwargs)	Draws a line from a line, curve, or a 2-tuple of 2-tuples (e.g., ((x, y), (x, y))).
im.draw_vline(location, stroke={color}, stroke_width=1)	im.draw_vlines(list_of_locations, **kwargs)	Draws a vertical line at the x-coordinate indicated by location.
im.draw_hline(location, stroke={color}, stroke_width=1)	im.draw_hlines(list_of_locations, **kwargs)	Draws a horizontal line at the y-coordinate indicated by location.
im.draw_rect(bbox_or_obj, fill={color}, stroke={color}, stroke_width=1)	im.draw_rects(list_of_rects, **kwargs)	Draws a rectangle from a rect, char, etc., or 4-tuple bounding box.
im.draw_circle(center_or_obj, radius=5, fill={color}, stroke={color})	im.draw_circles(list_of_circles, **kwargs)	Draws a circle at (x, y) coordinate or at the center of a char, rect, etc.

Note: The methods above are built on Pillow's ImageDraw methods, but the parameters have been tweaked for consistency with SVG's fill/stroke/stroke_width nomenclature.

Extracting tables

pdfplumber's approach to table detection borrows heavily from Anssi Nurminen's master's thesis, and is inspired by Tabula. It works like this:

1. For any given PDF page, find the lines that are (a) explicitly defined and/or (b) implied by the alignment of words on the page.
2. Merge overlapping, or nearly-overlapping, lines.
3. Find the intersections of all those lines.
4. Find the most granular set of rectangles (i.e., cells) that use these intersections as their vertices.
5. Group contiguous cells into tables.

Table-extraction methods

pdfplumber.Page objects can call the following table methods:

Method	Description
.find_tables(table_settings={})	Returns a list of Table objects. The Table object provides access to the .cells, .rows, and .bbox properties, as well as the .extract(x_tolerance=3, y_tolerance=3) method.
.extract_tables(table_settings={})	Returns the text extracted from all tables found on the page, represented as a list of lists of lists, with the structure table -> row -> cell.
.extract_table(table_settings={})	Returns the text extracted from the largest table on the page, represented as a list of lists, with the structure row -> cell. (If multiple tables have the same size — as measured by the number of cells — this method returns the table closest to the top of the page.)
.debug_tablefinder(table_settings={})	Returns an instance of the TableFinder class, with access to the .edges, .intersections, .cells, and .tables properties.

For example:

pdf = pdfplumber.open("path/to/my.pdf")
page = pdf.pages[0]
page.extract_table()

Click here for a more detailed example.

Table-extraction settings

By default, extract_tables uses the page's vertical and horizontal lines (or rectangle edges) as cell-separators. But the method is highly customizable via the table_settings argument. The possible settings, and their defaults:

{
    "vertical_strategy": "lines", 
    "horizontal_strategy": "lines",
    "explicit_vertical_lines": [],
    "explicit_horizontal_lines": [],
    "snap_tolerance": 3,
    "join_tolerance": 3,
    "edge_min_length": 3,
    "min_words_vertical": 3,
    "min_words_horizontal": 1,
    "keep_blank_chars": False,
    "text_tolerance": 3,
    "text_x_tolerance": None,
    "text_y_tolerance": None,
    "intersection_tolerance": 3,
    "intersection_x_tolerance": None,
    "intersection_y_tolerance": None,
}

Setting	Description
"vertical_strategy"	Either "lines", "lines_strict", "text", or "explicit". See explanation below.
"horizontal_strategy"	Either "lines", "lines_strict", "text", or "explicit". See explanation below.
"explicit_vertical_lines"	A list of vertical lines that explicitly demarcate cells in the table. Can be used in combination with any of the strategies above. Items in the list should be either numbers — indicating the x coordinate of a line the full height of the page — or a dictionary describing the line, with at least the following keys: x, top, bottom.
"explicit_horizontal_lines"	A list of vertical lines that explicitly demarcate cells in the table. Can be used in combination with any of the strategies above. Items in the list should be either numbers — indicating the y coordinate of a line the full height of the page — or a dictionary describing the line, with at least the following keys: top, x0, x1.
"snap_tolerance"	Parallel lines within snap_tolerance pixels will be "snapped" to the same horizontal or vertical position.
"join_tolerance"	Line segments on the same infinite line, and whose ends are within join_tolerance of one another, will be "joined" into a single line segment.
"edge_min_length"	Edges shorter than edge_min_length will be discarded before attempting to reconstruct the table.
"min_words_vertical"	When using "vertical_strategy": "text", at least min_words_vertical words must share the same alignment.
"min_words_horizontal"	When using "horizontal_strategy": "text", at least min_words_horizontal words must share the same alignment.
"keep_blank_chars"	When using the text strategy, consider " " chars to be parts of words and not word-separators.
"text_tolerance", "text_x_tolerance", "text_y_tolerance"	When the text strategy searches for words, it will expect the individual letters in each word to be no more than text_tolerance pixels apart.
"intersection_tolerance", "intersection_x_tolerance", "intersection_y_tolerance"	When combining edges into cells, orthogonal edges must be within intersection_tolerance pixels to be considered intersecting.

Table-extraction strategies

Both vertical_strategy and horizontal_strategy accept the following options:

Strategy	Description
"lines"	Use the page's graphical lines — including the sides of rectangle objects — as the borders of potential table-cells.
"lines_strict"	Use the page's graphical lines — but not the sides of rectangle objects — as the borders of potential table-cells.
"text"	For vertical_strategy: Deduce the (imaginary) lines that connect the left, right, or center of words on the page, and use those lines as the borders of potential table-cells. For horizontal_strategy, the same but using the tops of words.
"explicit"	Only use the lines explicitly defined in explicit_vertical_lines / explicit_horizontal_lines.

Notes

• Often it's helpful to crop a page — Page.crop(bounding_box) — before trying to extract the table.

• Table extraction for pdfplumber was radically redesigned for v0.5.0, and introduced breaking changes.

Demonstrations

• Using extract_table on a California Worker Adjustment and Retraining Notification (WARN) report. Demonstrates basic visual debugging and table extraction.
• Using extract_table on the FBI's National Instant Criminal Background Check System PDFs. Demonstrates how to use visual debugging to find optimal table extraction settings. Also demonstrates Page.crop(...) and Page.extract_text(...).
• Inspecting and visualizing curve objects.
• Extracting fixed-width data from a San Jose PD firearm search report, an example of using Page.extract_text(...).

Acknowledgments / Contributors

Many thanks to the following users who've contributed ideas, features, and fixes:

• Jacob Fenton
• Dan Nguyen
• Jeff Barrera
• Bob Lannon
• Dustin Tindall
• @yevgnen
• @meldonization
• Oisín Moran

Contributing

Pull requests are welcome, but please submit an issue (or email jsvine@gmail.com) before submitting one, as the library is in active development. The current development branch is v0.6.0.