CODEWITHSUNDEEP
pythonctypes
toshbar
toshbar

Reputation: 293

Python 3.5, ctypes: TypeError: bytes or integer address expected instead of str instance

I'm having an issue with ctypes. I think my type conversion is correct and the error isn't making sense to me. Error on line " arg - ct.c_char_p(logfilepath) " TypeError: bytes or integer address expected instead of str instance

I tried in both python 3.5 and 3.4.

function i'm calling:

stream_initialize('stream_log.txt')

Stream_initialize code"

def stream_initialize(logfilepath):
    f = shim.stream_initialize
    arg = ct.c_char_p(logfilepath)
    result = f(arg)

    if result:
        print(find_shim_error(result))

Upvotes: 14

Views: 26708

Answers (2)

GPMueller
GPMueller

Reputation: 3139

For completeness' sake: It is also possible to call it as stream_initialize(b'stream_log.txt'). Note the b in front of the string, which causes it to be interpreted as a bytes object.

Upvotes: 2

user1238367
user1238367

Reputation: 525

c_char_p takes bytes object so you have to convert your string to bytes first:

ct.c_char_p(logfilepath.encode('utf-8'))

Another solution is using the c_wchar_p type which takes a string.

Upvotes: 35

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