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Flush stdout if a custom model printer has been registered. #610

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Merged
rkaminsk merged 1 commit into from
Mar 16, 2026
Merged

Flush stdout if a custom model printer has been registered. #610

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5 changes: 5 additions & 0 deletions lib/python-api/src/app.cc
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
#include <iostream>
#include <utility>

#include "app.hh"
Expand Down Expand Up @@ -138,7 +139,11 @@ class App : public reference_keeper<App> {
void *data) -> bool {
auto &app = *static_cast<App *>(data);
CLINGO_TRY {
auto acquire = py::gil_scoped_acquire{};
// NOTE: Python seems to directly write large buffers
std::cout.flush();
app.print_model(Model{model}, [printer, printer_data]() { handle_error(printer(printer_data)); });
py::module_::import("sys").attr("stdout").attr("flush")();
}
CLINGO_CATCH;
}
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