equinor/cwrap

cwrap is a Python wrapper around C code, building upon ctypes.

cwrap

cwrap is a Python wrapper around C code, building upon ctypes.

Examples

See examples/

Installing

pip install cwrap

Running tests

Clone this repo and cd into it, then:

pip install -r requirements.txt
python -m pytest -v -s tests

cwrap's Issues

Use Github Actions

Travis is deprecated.

Should support:

• Python 3.6 - 3.9
• Windows, Linux, Maco

windows python3.6 import error

import cwrap

ImportError Traceback (most recent call last)
in ()
----> 1 import cwrap

D:\WPy-x64-3662\python-3.6.6.amd64\lib\site-packages\cwrap_init_.py in ()
44 from .basecvalue import BaseCValue
45
---> 46 from .cfile import CFILE, copen as open
47 from .clib import load, lib_name
48

D:\WPy-x64-3662\python-3.6.6.amd64\lib\site-packages\cwrap\cfile.py in ()
89 from .clib import load as cwrapload
90
---> 91 class LibcPrototype(Prototype):
92 lib = cwrapload(None)
93

D:\WPy-x64-3662\python-3.6.6.amd64\lib\site-packages\cwrap\cfile.py in LibcPrototype()
90
91 class LibcPrototype(Prototype):
---> 92 lib = cwrapload(None)
93
94 def init(self, prototype, bind=False, allow_attribute_error=False):

D:\WPy-x64-3662\python-3.6.6.amd64\lib\site-packages\cwrap\clib.py in load(lib, so_version, path, so_ext)
107 # """ % LD_LIBRARY_PATH
108 # raise ImportError(error_msg)

ImportError:
Failed to load shared library:None

dlopen() error: LoadLibrary() argument 1 must be str, not None

CWrapFile should have write member function

This used to be possible before:

with open("grid.grdecl" , "w") as f2:
f2.write("SPECGRID\n")
f2.write(" 10 10 10 'F' /\n")
coord_kw = f["COORD"][0]
coord_kw.write_grdecl( f2 )

Now it isn't.
open cannot be exhanged with copen, because CWrapFIle does not have a "write" member function.

Instances of baseCenum is not treated as int by ctypes in python3.11

Describe the bug
When prototype.call is used on a function expecting an int and you give it an instance of basecenum it will give you a ValueError in python3.11, due to stricter type enforcements.

To Reproduce
Run resdata tests onprem, or run this script:

from cwrap import BaseCEnum
from resdata.resfile import ResdataFile
from resdata import FileMode
  
f1 = ResdataFile("some_file.some", index_filename="index")

will faile with TypeError on python3.11 while it fails on file not found for python3.8.

Add osx travis build

At the moment, travis is not run on osx as python is not natively supported on osx.

ArgumentError has no message attribute

On python 3.6

cwrap/cwrap/prototype.py

Line 226 in f5cd749

tokens = re.split("[ :]", err.message)

will cause an AttributeError: ArgumentError object has no attribute 'message'.