Error in reading tables in pdf even though ghostscript is installed

[KanduriR]

Hi I am trying to read tables in a pdf with multiple columns, and this is the output error I get.

Type "help", "copyright", "credits" or "license" for more information.
>>> import camelot
>>> tables = camelot.read_pdf('/Users/sgudisa/Desktop/FashionReport_2019_46-63.pdf')
Traceback (most recent call last):
  File "//anaconda3/lib/python3.7/site-packages/camelot/ext/ghostscript/_gsprint.py", line 251, in <module>
    libgs = cdll.LoadLibrary("libgs.so")
  File "//anaconda3/lib/python3.7/ctypes/__init__.py", line 434, in LoadLibrary
    return self._dlltype(name)
  File "//anaconda3/lib/python3.7/ctypes/__init__.py", line 356, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: dlopen(libgs.so, 6): image not found

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "//anaconda3/lib/python3.7/site-packages/camelot/io.py", line 117, in read_pdf
    **kwargs
  File "//anaconda3/lib/python3.7/site-packages/camelot/handlers.py", line 172, in parse
    p, suppress_stdout=suppress_stdout, layout_kwargs=layout_kwargs
  File "//anaconda3/lib/python3.7/site-packages/camelot/parsers/lattice.py", line 403, in extract_tables
    self._generate_image()
  File "//anaconda3/lib/python3.7/site-packages/camelot/parsers/lattice.py", line 212, in _generate_image
    from ..ext.ghostscript import Ghostscript
  File "//anaconda3/lib/python3.7/site-packages/camelot/ext/ghostscript/__init__.py", line 24, in <module>
    from . import _gsprint as gs
  File "//anaconda3/lib/python3.7/site-packages/camelot/ext/ghostscript/_gsprint.py", line 258, in <module>
    raise RuntimeError("Please make sure that Ghostscript is installed")
RuntimeError: Please make sure that Ghostscript is installed
>>> gs -version
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'gs' is not defined
>>> exit()

(base) Srujans-MacBook-Air:~ sgudisa$ gs -version
GPL Ghostscript 9.22 (2017-10-04)
Copyright (C) 2017 Artifex Software, Inc.  All rights reserved.
(base) Srujans-MacBook-Air:~ sgudisa$ 

I see two errors in the output, an OSERRO 'dlopen : image not found' and other is the ghostscript not available. I've checked using the gs -version command and I see that ghostscript being available. Attaching the pdf file that I am trying to readout. So far i understand that the lattice option can read out the pdf tables but I couldn't even come upto there.

FashionReport_2019_46-63.pdf

[AsgerPetersen]

I get this error too on OSX with the following conda 4.8.3 environment:

conda create -n camelot
conda activate camelot
conda install -c conda-forge camelot-py
python

and then in python:

import camelot
f = "file.pdf"
tables = camelot.read_pdf(f)

It seems to be independent of the pdf file used.

[chfw]

It is related to this SO post: https://stackoverflow.com/questions/6848903/python-ghostscript-runtimeerror-can-not-find-ghostscript-library-libgs

I have to hack camelot/ext/ghostscript/_gsprint.py

else:
    try:
        libgs = cdll.LoadLibrary("libgs.so")
    except OSError:
        # shared object file not found
        import ctypes.util

        libgs = ctypes.util.find_library("/usr/local/Cellar/ghostscript/9.53.3/lib/libgs")  # <-- hack
        if not libgs:
            raise RuntimeError("Please make sure that Ghostscript is installed")
        libgs = cdll.LoadLibrary(libgs)

[chfw]

please try: 'which gs' and figure out where your libgs is and do the back. that's my two cents.

[chfw]

please evaluate this PR: #426 too. It worked for me and I can remove my hack.