environment/lib/python2.7/site-packages/IPython/utils/_process_win32_controller.py
def _stdin_raw_block(self):
        """Use a blocking stdin read"""
        # The big problem with the blocking read is that it doesn't
        # exit when it's supposed to in all contexts. An extra
        # key-press may be required to trigger the exit.
        try:
            data = sys.stdin.read(1)
            data = data.replace('\r', '\n')
            return data
        except WindowsError as we:
            if we.winerror == ERROR_NO_DATA:
                # This error occurs when the pipe is closed
                return None
            else:
                # Otherwise let the error propagate
                raise we
def _stdin_raw_block(self):
        """Use a blocking stdin read"""
        # The big problem with the blocking read is that it doesn't
        # exit when it's supposed to in all contexts. An extra
        # key-press may be required to trigger the exit.
        try:
            data = sys.stdin.read(1)
            data = data.replace('\r', '\n')
            return data
        except WindowsError as we:
            if we.winerror == ERROR_NO_DATA:
                # This error occurs when the pipe is closed
                return None
            else:
                # Otherwise let the error propagate
                raise we
Use a blocking stdin read