• Fix spp mode bug (#758): from __future__ imports must occur at the beginning of the file
• Fix spp mode bug (#760): 'Set' object has no attribute 'ctx'
• Fix spp mode bug (#760): redefinition of _listcomp_326_1
• Fix spp mode bug: Can not import XXX from MMM
• Fix spp mode bug: using PYTHONOPTIMIZE may results in sppmode fails.
• Fix spp mode bugs regarding to with/lambda/comprehension