本文整理汇总了Python中ustruct.pack_into函数的典型用法代码示例。如果您正苦于以下问题：Python pack_into函数的具体用法？Python pack_into怎么用？Python pack_into使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了pack_into函数的13个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: wait_msg
def wait_msg(self):
res = self.sock.read(1)
self.sock.setblocking(True)
if res is None:
return None
if res == b"":
raise OSError(-1)
if res == b"\xd0": # PINGRESP
sz = self.sock.read(1)[0]
assert sz == 0
return None
op = res[0]
if op & 0xf0 != 0x30:
return op
sz = self._recv_len()
topic_len = self.sock.read(2)
topic_len = (topic_len[0] << 8) | topic_len[1]
topic = self.sock.read(topic_len)
sz -= topic_len + 2
if op & 6:
pid = self.sock.read(2)
pid = pid[0] << 8 | pid[1]
sz -= 2
msg = self.sock.read(sz)
self.cb(topic, msg)
if op & 6 == 2:
pkt = bytearray(b"\x40\x02\0\0")
struct.pack_into("!H", pkt, 2, pid)
self.sock.write(pkt)
elif op & 6 == 4:
assert 0示例2: publish
def publish(self, topic, msg, retain=False, qos=0):
pkt = bytearray(b"\x30\0\0\0")
pkt[0] |= qos << 1 | retain
sz = 2 + len(topic) + len(msg)
if qos > 0:
sz += 2
assert sz < 2097152
i = 1
while sz > 0x7f:
pkt[i] = (sz & 0x7f) | 0x80
sz >>= 7
i += 1
pkt[i] = sz
#print(hex(len(pkt)), hexlify(pkt, ":"))
self.sock.write(pkt, i + 1)
self._send_str(topic)
if qos > 0:
self.pid += 1
pid = self.pid
struct.pack_into("!H", pkt, 0, pid)
self.sock.write(pkt, 2)
self.sock.write(msg)
if qos == 1:
while 1:
op = self.wait_msg()
if op == 0x40:
sz = self.sock.read(1)
assert sz == b"\x02"
rcv_pid = self.sock.read(2)
rcv_pid = rcv_pid[0] << 8 | rcv_pid[1]
if pid == rcv_pid:
return
elif qos == 2:
assert 0示例3: publish
def publish(self, topic, msg, retain=False, qos=0):
pkt = bytearray(b"\x30\0\0")
pkt[0] |= qos << 1 | retain
sz = 2 + len(topic) + len(msg)
if qos > 0:
sz += 2
assert sz <= 16383
pkt[1] = (sz & 0x7f) | 0x80
pkt[2] = sz >> 7
#print(hex(len(pkt)), hexlify(pkt, ":"))
self.sock.send(pkt)
self._send_str(topic)
if qos > 0:
self.pid += 1
pid = self.pid
buf = bytearray(b"\0\0")
struct.pack_into("!H", buf, 0, pid)
self.sock.send(buf)
self.sock.send(msg)
if qos == 1:
while 1:
op = self.wait_msg()
if op == 0x40:
sz = self.sock.recv(1)
assert sz == b"\x02"
rcv_pid = self.sock.recv(2)
rcv_pid = rcv_pid[0] << 8 | rcv_pid[1]
if pid == rcv_pid:
return
elif qos == 2:
assert 0示例4: _register_char
def _register_char(self, register, value=None, buf=bytearray(1)):
if value is None:
self.i2c.readfrom_mem_into(self.address, register, buf)
return buf[0]
ustruct.pack_into("<b", buf, 0, value)
return self.i2c.writeto_mem(self.address, register, buf)示例5: _register_short
def _register_short(self, register, value=None, buf=bytearray(2)):
if value is None:
self.i2c.readfrom_mem_into(self.address, register, buf)
return ustruct.unpack("<h", buf)[0]
ustruct.pack_into("<h", buf, 0, value)
return self.i2c.writeto_mem(self.address, register, buf)示例6: subscribe
def subscribe(self, topic):
print("subscribe")
pkt = bytearray(b"\x82\0\0\0")
self.pid += 1
# B=1 byte; H = 2 bytes,!=network or big endian and offset is 1
struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic) + 1, self.pid)
self.sock.send(pkt)
self.send_str(topic.encode('utf-8'))
self.sock.send(b"\0")
resp = self.sock.recv(5)
print(resp)
assert resp[0] == 0x90
assert resp[2] == pkt[2] and resp[3] == pkt[3]
assert resp[4] == 0示例7: subscribe
def subscribe(self, topic, qos=0):
assert self.cb is not None, "Subscribe callback is not set"
pkt = bytearray(b"\x82\0\0\0")
self.pid += 1
struct.pack_into("!BH", pkt, 1, 2 + 2 + len(topic) + 1, self.pid)
#print(hex(len(pkt)), hexlify(pkt, ":"))
self.sock.send(pkt)
self._send_str(topic)
self.sock.send(qos.to_bytes(1))
resp = self.sock.recv(5)
#print(resp)
assert resp[0] == 0x90
assert resp[2] == pkt[2] and resp[3] == pkt[3]
if resp[4] == 0x80:
raise MQTTException(resp[4])示例8: subscribe
def subscribe(self,topic,qos=0):
assert self.cb is not None,"Subscribe callback is not set"
pkt=bytearray(b"\x82\0\0\0")
self.pid+=1
struct.pack_into("!BH",pkt,1,2+2+len(topic)+1,self.pid)
self.sock.write(pkt)
self._send_str(topic)
self.sock.write(qos.to_bytes(1,"little"))
while 1:
op=self.wait_msg()
if op==0x90:
resp=self.sock.read(4)
assert resp[1]==pkt[2]and resp[2]==pkt[3]
if resp[3]==0x80:
raise MQTTException(resp[3])
return示例9: _fcmd2b
def _fcmd2b(self, fmt, a0, a1, a2, a3, a4=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2, a3, a4)
self._send(buf)示例10: _fcmd2
def _fcmd2(self, fmt, a0, a1=0, a2=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2)
self._send(buf)示例11: set_scroll_win
def set_scroll_win(self, win, x=-1, y=0, w=0, h=0, vec=0, pat=0, fill=0x07e0, color=0):
pack_into('<BBBHHHHHHHH', self.buf19, 0, 2, 0x55, win, x, y, w, h, vec, pat, fill, color)
self._send(self.buf19)示例12: set_spi_win
def set_spi_win(self, x, y, w, h):
pack_into('<BBBHHHHHHHH', self.buf19, 0, 2, 0x55, 10, x, y, x + w - 1, y + h - 1, 0, 0, 0, 0xffff)
self._send(self.buf19)示例13: print
print('TypeError')
# make sure that unknown types are detected
try:
struct.pack("z", 1)
except:
print("Unknown type")
# Initially repitition counters were supported only for strings,
# but later were implemented for all.
print(struct.unpack("<3B2h", b"foo\x12\x34\xff\xff"))
print(struct.pack("<3B", 1, 2, 3))
# pack_into
buf = bytearray(b'>>>123<<<')
struct.pack_into('<bbb', buf, 3, 0x41, 0x42, 0x43)
print(buf)
struct.pack_into('<bbb', buf, -6, 0x44, 0x45, 0x46)
print(buf)
try:
struct.pack_into('<bbb', buf, 7, 0x41, 0x42, 0x43)
except:
print('struct.error')
try:
struct.pack_into('<bbb', buf, -10, 0x41, 0x42, 0x43)
except:
print('struct.error')
# unpack_from
buf = b'0123456789'