Alcott questions

• Python pandas groupby aggregation
• `void *` to other pointer
• What are the differences between swap in C++ and Python?
• Image Recognition using Python [closed]
• [python]: problem about python string literals
• `__dict__` of classes in Python
• eof of istream in C++
• retrieve a `char *` returned from C function exported from .so in Python
• Why do variables live longer (have bigger scopes) in Python than in C?
• instance.__dict__ & class.__dict__

Alcott answers