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February 24, 2018 15:43
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Process and thread repl interfaces with (link to) buffer (consume/excrete)
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import sys | |
import time | |
import PyQt5.QtCore | |
import PyQt5.QtWidgets | |
app = PyQt5.QtWidgets.QApplication(sys.argv) | |
text = PyQt5.QtWidgets.QTextEdit() | |
def append(s): | |
scrollbar = text.verticalScrollBar() | |
at_end = scrollbar.value() == scrollbar.maximum() | |
text.append(s) | |
if at_end: | |
scrollbar.setValue(scrollbar.maximum()) | |
text.setReadOnly(True) | |
line = PyQt5.QtWidgets.QLineEdit() | |
layout = PyQt5.QtWidgets.QVBoxLayout() | |
label = PyQt5.QtWidgets.QLabel() | |
layout.addWidget(label) | |
layout.addWidget(text) | |
layout.addWidget(line) | |
widget = PyQt5.QtWidgets.QWidget() | |
widget.setLayout(layout) | |
window = PyQt5.QtWidgets.QMainWindow() | |
window.setCentralWidget(widget) | |
python = PyQt5.QtCore.QProcess() | |
def stderr(): | |
append(bytes(python.readAllStandardError()).decode('utf-8')) | |
def stdout(): | |
append(bytes(python.readAllStandardOutput()).decode('utf-8')) | |
python.readyReadStandardError.connect(stderr) | |
python.readyReadStandardOutput.connect(stdout) | |
def text_entered(): | |
s = line.text() + '\n' | |
b = s.encode('utf-8') | |
append(s) | |
python.write(b) | |
line.setText('') | |
line.returnPressed.connect(text_entered) | |
python.start(sys.executable, ['-u', '-i']) | |
line.setFocus() | |
timer = PyQt5.QtCore.QTimer() | |
timer.setInterval(0.2) | |
def update_time(): | |
label.setText('{:.2f}'.format(time.monotonic())) | |
timer.timeout.connect(update_time) | |
timer.start() | |
line.setText("import time; print('before'); time.sleep(5); print('after')") | |
window.show() | |
app.exec() | |
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import io | |
import sys | |
import time | |
import PyQt5.QtCore | |
import PyQt5.QtWidgets | |
class Stream(PyQt5.QtCore.QObject): | |
written = PyQt5.QtCore.pyqtSignal(str) | |
def write(self, *args, **kwargs): | |
s = io.StringIO() | |
result = s.write(*args, **kwargs) | |
s.seek(0) | |
self.written.emit(s.read()) | |
return result | |
# s = Stream() | |
# s.write('blue') | |
# s.write('red') | |
# print(s.read()) | |
# s.write('green') | |
# print(s.read()) | |
# print(s.read()) | |
class Console(PyQt5.QtCore.QObject): | |
stdout_written = PyQt5.QtCore.pyqtSignal(str) | |
stderr_written = PyQt5.QtCore.pyqtSignal(str) | |
def __init__(self, *args, **kwargs): | |
super().__init__(*args, **kwargs) | |
self.console = None | |
self.stdout = Stream() | |
self.stdout.written.connect(self.stdout_written) | |
self.stderr = Stream() | |
self.stderr.written.connect(self.stderr_written) | |
@PyQt5.QtCore.pyqtSlot() | |
def start(self): | |
import code | |
self.console = code.InteractiveConsole() | |
@PyQt5.QtCore.pyqtSlot(str) | |
def runcode(self, code): | |
bak_stdout = sys.stdout | |
sys.stdout = self.stdout | |
bak_stderr = sys.stderr | |
sys.stderr = self.stderr | |
result = None | |
try: | |
result = self.console.runcode(code) | |
except SyntaxError: | |
self.console.showsyntaxerror() | |
except: | |
self.console.showtraceback() | |
sys.stdout = bak_stdout | |
sys.stderr = bak_stderr | |
return result | |
class Interpreter(PyQt5.QtCore.QObject): | |
_start = PyQt5.QtCore.pyqtSignal() | |
_runcode = PyQt5.QtCore.pyqtSignal(str) | |
stdout_written = PyQt5.QtCore.pyqtSignal(str) | |
stderr_written = PyQt5.QtCore.pyqtSignal(str) | |
def __init__(self, *args, **kwargs): | |
super().__init__(*args, **kwargs) | |
self.console = Console() | |
self._start.connect(self.console.start) | |
self._runcode.connect(self.console.runcode) | |
self.console.stdout_written.connect(self.stdout_written) | |
self.console.stderr_written.connect(self.stderr_written) | |
self.thread = PyQt5.QtCore.QThread() | |
self.console.moveToThread(self.thread) | |
def start(self): | |
self.thread.start() | |
self._start.emit() | |
def runcode(self, s): | |
self._runcode.emit(s) | |
app = PyQt5.QtWidgets.QApplication(sys.argv) | |
text = PyQt5.QtWidgets.QTextEdit() | |
def append(s): | |
scrollbar = text.verticalScrollBar() | |
at_end = scrollbar.value() == scrollbar.maximum() | |
text.append(s) | |
if at_end: | |
scrollbar.setValue(scrollbar.maximum()) | |
text.setReadOnly(True) | |
line = PyQt5.QtWidgets.QLineEdit() | |
layout = PyQt5.QtWidgets.QVBoxLayout() | |
label = PyQt5.QtWidgets.QLabel() | |
layout.addWidget(label) | |
layout.addWidget(text) | |
layout.addWidget(line) | |
widget = PyQt5.QtWidgets.QWidget() | |
widget.setLayout(layout) | |
window = PyQt5.QtWidgets.QMainWindow() | |
window.setCentralWidget(widget) | |
# python = PyQt5.QtCore.QProcess() | |
python = Interpreter() | |
python.start() | |
def stderr(s): | |
append(s) | |
def stdout(s): | |
append(s) | |
python.stdout_written.connect(stdout) | |
python.stderr_written.connect(stderr) | |
def text_entered(): | |
s = line.text() + '\n' | |
append(s) | |
python.runcode(s) | |
line.setText('') | |
line.returnPressed.connect(text_entered) | |
line.setFocus() | |
timer = PyQt5.QtCore.QTimer() | |
timer.setInterval(0.2) | |
def update_time(): | |
label.setText('{:.2f}'.format(time.monotonic())) | |
timer.timeout.connect(update_time) | |
timer.start() | |
line.setText("import time; print('before'); time.sleep(5); print('after')") | |
window.show() | |
app.exec() | |
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buffer here: https://gist.github.com/daegontaven/a986a2241e15e95be7489f443e79fb7f#file-mvce_main-py-L15
(consume/excrete)