upstream/ipython Files · examples/Embedding/inprocess_terminal.py

Backport PR : fix n^2 performance issue in coalesce_streams preprocessor...

Backport PR : fix n^2 performance issue in coalesce_streams preprocessor for n consecutive stream outputs, `\r` fix would be compiled n times, and applied to each ith output (n-i) times. - move pattern to module level - apply replacement after coalescing outputs An example notebook from nbviewer with ~1k outputs that was taking 90 seconds to render now takes 3 seconds.

Brian E. Granger - - Load All Authors

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             inprocess_terminal.py
        
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      from __future__ import print_function

      import os

      from IPython.kernel.inprocess import InProcessKernelManager

      from IPython.terminal.console.interactiveshell import ZMQTerminalInteractiveShell

      def print_process_id():

          print('Process ID is:', os.getpid())

      def main():

          print_process_id()

          # Create an in-process kernel

          # >>> print_process_id()

          # will print the same process ID as the main process

          kernel_manager = InProcessKernelManager()

          kernel_manager.start_kernel()

          kernel = kernel_manager.kernel

          kernel.gui = 'qt4'

          kernel.shell.push({'foo': 43, 'print_process_id': print_process_id})

          client = kernel_manager.client()

          client.start_channels()

          shell = ZMQTerminalInteractiveShell(manager=kernel_manager, client=client)

          shell.mainloop()

      if __name__ == '__main__':

          main()

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				from __future__ import print_function
				import os

				from IPython.kernel.inprocess import InProcessKernelManager
				from IPython.terminal.console.interactiveshell import ZMQTerminalInteractiveShell


				def print_process_id():
				print('Process ID is:', os.getpid())


				def main():
				print_process_id()

				# Create an in-process kernel
				# >>> print_process_id()
				# will print the same process ID as the main process
				kernel_manager = InProcessKernelManager()
				kernel_manager.start_kernel()
				kernel = kernel_manager.kernel
				kernel.gui = 'qt4'
				kernel.shell.push({'foo': 43, 'print_process_id': print_process_id})
				client = kernel_manager.client()
				client.start_channels()

				shell = ZMQTerminalInteractiveShell(manager=kernel_manager, client=client)
				shell.mainloop()


				if __name__ == '__main__':
				main()