This is a library that implements C++-style IO with streams in Python. It is not a wrapper around the actual C++ streams, but instead provides a higher-level interface that is more Pythonic.
For example
#include <iostream>
#include <fstream>
std::cout << "Hello, " << "World!" << std::endl;
std::ofstream ostrm("test.txt");
ostrm << "Hello, World!" << std::endl;
translates to
import cppstream
cppstream.cout << "Hello, " << "World!" << cppstream.endl
ostrm = cppstream.OutFileStream()
# or using the context manager
with cppstream.OutFileStream() as ofs:
ofs.open("test.txt")
ofs << "beans" << cppstream.endl
See the inheritance diagram: