Hi,
I tried to install rklib under python3, some errors occurred:
Compiling rklib/compress.pyx because it changed.
Compiling rklib/fmtprint.pyx because it changed.
Compiling rklib/googletr.pyx because it changed.
Compiling rklib/log.pyx because it changed.
Compiling rklib/mhtml.pyx because it changed.
Compiling rklib/mhtml_v4.pyx because it changed.
Compiling rklib/mp.pyx because it changed.
Compiling rklib/plot_kegg.pyx because it changed.
Compiling rklib/progress_bar.pyx because it changed.
Compiling rklib/send_email.pyx because it changed.
Compiling rklib/test.pyx because it changed.
Compiling rklib/threads.pyx because it changed.
Compiling rklib/utils.pyx because it changed.
[ 1/13] Cythonizing rklib/compress.pyx
[ 2/13] Cythonizing rklib/fmtprint.pyx
[ 3/13] Cythonizing rklib/googletr.pyx
[ 4/13] Cythonizing rklib/log.pyx
[ 5/13] Cythonizing rklib/mhtml.pyx
[ 6/13] Cythonizing rklib/mhtml_v4.pyx
[ 7/13] Cythonizing rklib/mp.pyx
[ 8/13] Cythonizing rklib/plot_kegg.pyx
[ 9/13] Cythonizing rklib/progress_bar.pyx
[10/13] Cythonizing rklib/send_email.pyx
[11/13] Cythonizing rklib/test.pyx

Error compiling Cython file:

...

-- coding: UTF-8 --

import sys
import time
import utils
utils.monitor_controlC()
print "中文"
^

rklib/test.pyx:6:6: Syntax error in simple statement list
Traceback (most recent call last):
File "./setup.py", line 31, in
'ext_modules': cythonize("/.pyx",language_level=3),
File "/usr/local/lib/python3.8/dist-packages/Cython/Build/Dependencies.py", line 1102, in cythonize
cythonize_one(*args)
File "/usr/local/lib/python3.8/dist-packages/Cython/Build/Dependencies.py", line 1225, in cythonize_one
raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: rklib/test.pyx

How to fixed it?
Thank you.