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  3. psycopg2.extensions.POLL_READ

Python psycopg2.extensions 模块，POLL_READ 实例源码

我们从Python开源项目中，提取了以下21个代码示例，用于说明如何使用psycopg2.extensions.POLL_READ。

项目：ShelbySearch    作者：Agentscreech    | 项目源码 | 文件源码 
def crappy_callback(self, conn):
        """green callback failing after `self.to_error` time it is called"""
        import select
        from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

        while 1:
            if self.to_error is not None:
                self.to_error -= 1
                if self.to_error <= 0:
                    raise ZeroDivisionError("I accidentally the connection")
            try:
                state = conn.poll()
                if state == POLL_OK:
                    break
                elif state == POLL_READ:
                    select.select([conn.fileno()], [], [])
                elif state == POLL_WRITE:
                    select.select([], [conn.fileno()], [])
                else:
                    raise conn.OperationalError("bad state from poll: %s" % state)
            except KeyboardInterrupt:
                conn.cancel()
                # the loop will be broken by a server error
                continue
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：userbase-sns-lambda    作者：fartashh    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：aws-lambda-redshift-copy    作者：christianhxc    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：PyEloqua-Examples    作者：colemanja91    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        state = conn.poll()
        if state == POLL_OK:
            break
        elif state == POLL_READ:
            select.select([conn.fileno()], [], [])
        elif state == POLL_WRITE:
            select.select([], [conn.fileno()], [])
        else:
            raise conn.OperationalError("bad state from poll: %s" % state)
项目：flask    作者：bobohope    | 项目源码 | 文件源码 
def crappy_callback(self, conn):
        """green callback failing after `self.to_error` time it is called"""
        import select
        from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

        while 1:
            if self.to_error is not None:
                self.to_error -= 1
                if self.to_error <= 0:
                    raise ZeroDivisionError("I accidentally the connection")
            try:
                state = conn.poll()
                if state == POLL_OK:
                    break
                elif state == POLL_READ:
                    select.select([conn.fileno()], [], [])
                elif state == POLL_WRITE:
                    select.select([], [conn.fileno()], [])
                else:
                    raise conn.OperationalError("bad state from poll: %s" % state)
            except KeyboardInterrupt:
                conn.cancel()
                # the loop will be broken by a server error
                continue
项目：psycopg2-for-aws-lambda    作者：iwitaly    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue
项目：psycopg2-for-aws-lambda    作者：iwitaly    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue
项目：ShelbySearch    作者：Agentscreech    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue
项目：Price-Comparator    作者：Thejas-1    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue
项目：nmbs-realtime-feed    作者：datamindedbe    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue
项目：remoteControlPPT    作者：htwenning    | 项目源码 | 文件源码 
def eventlet_wait_callback(conn, timeout=-1):
    """A wait callback useful to allow eventlet to work with Psycopg."""
    while 1:
        state = conn.poll()
        if state == extensions.POLL_OK:
            break
        elif state == extensions.POLL_READ:
            trampoline(conn.fileno(), read=True)
        elif state == extensions.POLL_WRITE:
            trampoline(conn.fileno(), write=True)
        else:
            raise psycopg2.OperationalError(
                "Bad result from poll: %r" % state)
项目：deb-python-eventlet    作者：openstack    | 项目源码 | 文件源码 
def eventlet_wait_callback(conn, timeout=-1):
    """A wait callback useful to allow eventlet to work with Psycopg."""
    while 1:
        state = conn.poll()
        if state == extensions.POLL_OK:
            break
        elif state == extensions.POLL_READ:
            trampoline(conn.fileno(), read=True)
        elif state == extensions.POLL_WRITE:
            trampoline(conn.fileno(), write=True)
        else:
            raise psycopg2.OperationalError(
                "Bad result from poll: %r" % state)
项目：Sentry    作者：NetEaseGame    | 项目源码 | 文件源码 
def gevent_wait_callback(conn, timeout=None):
    """A wait callback useful to allow gevent to work with Psycopg."""
    while 1:
        state = conn.poll()
        if state == extensions.POLL_OK:
            break
        elif state == extensions.POLL_READ:
            wait_read(conn.fileno(), timeout=timeout)
        elif state == extensions.POLL_WRITE:
            wait_write(conn.fileno(), timeout=timeout)
        else:
            raise psycopg2.OperationalError(
                "Bad result from poll: %r" % state)
项目：flask    作者：bobohope    | 项目源码 | 文件源码 
def wait_select(conn):
    """Wait until a connection or cursor has data available.

    The function is an example of a wait callback to be registered with
    `~psycopg2.extensions.set_wait_callback()`. This function uses
    :py:func:`~select.select()` to wait for data available.

    """
    import select
    from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE

    while 1:
        try:
            state = conn.poll()
            if state == POLL_OK:
                break
            elif state == POLL_READ:
                select.select([conn.fileno()], [], [])
            elif state == POLL_WRITE:
                select.select([], [conn.fileno()], [])
            else:
                raise conn.OperationalError("bad state from poll: %s" % state)
        except KeyboardInterrupt:
            conn.cancel()
            # the loop will be broken by a server error
            continue