==========================
`python-ghostscript`
==========================
---------------------------------------------------------------------
Python-Interface to the Ghostscript C-API
---------------------------------------------------------------------
:Author: Hartmut Goebel <h.goebel@crazy-compiler.com>
:Version: 0.7
:License: GNU General Public License v3 or later (GPLv3+)
:Homepage: https://gitlab.com/pdftools/python-ghostscript
`Ghostscript`__ is a well known interpreter for the PostScript
language and for PDF. This package implements a interface to the
`Ghostscript C-API`__ using `ctypes`__. Both a low-level and a pythonic,
high-level interface are provided.
__ http://www.ghostscript.com/
__ http://pages.cs.wisc.edu/~ghost/doc/cvs/API.htm
__ http://docs.python.org/library/ctypes.html
This package is currently tested only under GNU/Linux. Please report
whether it works in your environment, too. Thanks.
Example
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here is an example for how to use the high-level interface of
`python-ghostscript`. This implements a very basic ps2pdf-tool::
import sys
import locale
import ghostscript
args = [
"ps2pdf", # actual value doesn't matter
"-dNOPAUSE", "-dBATCH", "-dSAFER",
"-sDEVICE=pdfwrite",
"-sOutputFile=" + sys.argv[1],
"-c", ".setpdfwrite",
"-f", sys.argv[2]
]
# arguments have to be bytes, encode them
encoding = locale.getpreferredencoding()
args = [a.encode(encoding) for a in args]
ghostscript.Ghostscript(*args)
Here an example for passing a string document to Ghostscript::
doc = b"""%!
/Helvetica findfont 20 scalefont setfont
50 50 moveto
(Hello World) show
showpage
quit
"""
import ghostscript
args = b"""test.py
-dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite -sOutputFile=/tmp/out.pdf
-c .setpdfwrite""".split()
with ghostscript.Ghostscript(*args) as gs:
gs.run_string(doc)
More examples can be found in the `examples` subdirectory of the
distribution archive.
Requirements and Installation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:Please note: This package is meant for developers. Even if there are
some usable examples included, installations instructions are meant
for developers.
`python-ghostscript` requires
* `Python`__ 3.6 or higher (tested with Python 3.6–3.9)
* `setuptools`__ for installation (see below)
* `Ghostscript`__ Version 9.0.8 or higher
__ http://www.python.org/download/
__ http://pypi.python.org/pypi/setuptools
__ http://www.ghostscript.com/
Installing python-ghostscript
---------------------------------
Since this package is meant for developers, we assume you have
experience in installing Python packages.
`python-ghostscript` is listed on `PyPI (Python Package Index)`__, so
you can install it using `pip install ghostscript` as usual. Please
refer to the manuals of `pip` for further information.
__ http://pypi.python.org/pypi
Alternatively you my download and unpack the source package of
`python-ghostscript` from http://pypi.python.org/pypi/ghostscript and
run::
python ./setup.py install
.. Emacs config:
Local Variables:
mode: rst
ispell-local-dictionary: "american"
End:
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