I have a C function of this signature:
int fileopen(const char *fname, int flags)
In Linux system, I want to pass the fname from Python using ctypes so I use ctypes.c_char_p("file1.dat") as the following:
import ctypes as ctypes
dll_name = "IO/pyaio.so"
dllabspath = os.path.dirname(os.path.abspath(__file__)) + os.path.sep + dll_name
pyaio = ctypes.CDLL(dllabspath)
fd_w = pyaio.fileopen(ctypes.c_char_p("file1.dat"), 1)
But I get this error:
Traceback (most recent call last):
File "test.py", line 21, in <module>
fd_w = pyaio.fileopen(ctypes.c_char_p("file1.dat"), 1) # 0 read, 1 write
TypeError: bytes or integer address expected instead of str instance
I don't know another way to pass the string"file1.dat" than using ctypes.c_char_p. How to solve this problem?
Thank you
Change "file1.dat" to b"file1.dat" (which is the same you would get with 'file1.dat'.encode('ascii')).
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