Traceback (most recent call last):

 "/home/hh/.virtualenvs/sweddoc3/bin/sphinx-build", line 9, in <module>
load_entry_point('Sphinx==1.1.2', 'console_scripts', 'sphinx-build')()

 "/home/hh/.virtualenvs/sweddoc3/lib/python3.1/site-packages/sphinx/__init__.py", line 72, in main
return cmdline.main(argv)

 "/home/hh/.virtualenvs/sweddoc3/lib/python3.1/site-packages/sphinx/cmdline.py", line 142, in main
val = val.decode(likely_encoding)AttributeError: 'str' object has no attribute 'decode'
Traceback (most recent call last):

 "<ipython-input-105-729cbaf02a5a>", line 1, in <module>
autowrap.autowrap(expr, args=[x, t], helpers=[['f', 4*x, [x]]])

 "D:\Anaconda\lib\site-packages\sympy\utilities\autowrap.py", line 510, in autowrap
for name_h, expr_h, args_h in helpers:ValueError: need more than 1 value to unpack