Problems with Python 3.5 write calling to_bytes(data)

[cdkorzen]

I tried writing data to an opened serial port. The problem is the Python side tries to convert the data into bytes, and that conversion fails.

julia> versioninfo()
Julia Version 0.4.0
Commit 0ff703b* (2015-10-08 06:20 UTC)
Platform Info:
  System: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Sandybridge)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.3

Python 3.5.0 |Anaconda 2.4.0 (64-bit)| (default, Oct 20 2015, 07:26:33) [MSC v.1900 64 bit (AMD64)] on win32

julia> Pkg.status("PyCall")
 - PyCall                        1.2.0

julia> Pkg.status("SerialPorts")
 - SerialPorts                   0.0.7

julia> using SerialPorts

julia> s = SerialPort("COM9", 115200)
SerialPorts.SerialPort("COM9",115200,8,"N",1,nothing,false,false,false,PyObject
Serial<id=0x17539518, open=True>(port='COM9', baudrate=115200, bytesize=8, parit
y='N', stopbits=1, timeout=None, xonxoff=False, rtscts=False, dsrdtr=False))

julia> write(s,ASCIIString("G1X2"))
ERROR: PyError (:PyObject_Call) <class 'TypeError'>
TypeError("unicode strings are not supported, please encode to bytes: 'G1X2'",)
  File "C:\Users\Chris\Anaconda3\lib\site-packages\serial\serialwin32.py", line
301, in write
    data = to_bytes(data)
  File "C:\Users\Chris\Anaconda3\lib\site-packages\serial\serialutil.py", line 5
8, in to_bytes
    raise TypeError('unicode strings are not supported, please encode to bytes:
%r' % (seq,))

 [inlined code] from C:\Users\Chris\.julia\v0.4\PyCall\src\exception.jl:81
 in pycall at C:\Users\Chris\.julia\v0.4\PyCall\src\PyCall.jl:79
 in call at C:\Users\Chris\.julia\v0.4\PyCall\src\PyCall.jl:388
 in write at C:\Users\Chris\.julia\v0.4\SerialPorts\src\SerialPorts.jl:93

julia> write(s, UInt8(42))
ERROR: PyError (:PyObject_Call) <class 'TypeError'>
TypeError("'int' object is not iterable",)
  File "C:\Users\Chris\Anaconda3\lib\site-packages\serial\serialwin32.py", line
301, in write
    data = to_bytes(data)
  File "C:\Users\Chris\Anaconda3\lib\site-packages\serial\serialutil.py", line 6
1, in to_bytes
    for item in seq:

 [inlined code] from C:\Users\Chris\.julia\v0.4\PyCall\src\exception.jl:81
 in pycall at C:\Users\Chris\.julia\v0.4\PyCall\src\PyCall.jl:79
 in call at C:\Users\Chris\.julia\v0.4\PyCall\src\PyCall.jl:388
 in write at C:\Users\Chris\.julia\v0.4\SerialPorts\src\SerialPorts.jl:89

[sjkelly]

Hmm I haven't tested on 3.x in a while, so there could definitely be a regression. I'll work on it asap.

[DarioSarra]

Any update on this?

[sjkelly]

@DarioSarra I believe this should be fixed in v0.2.1.