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Issue #10141: Don't use hardcoded frame size in example, use struct.calcsize()

This commit is contained in:
Victor Stinner 2011-10-06 20:27:20 +02:00
parent 47413c1171
commit b09460f038
1 changed files with 2 additions and 1 deletions
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Doc/library/socket.rst
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@ -1270,6 +1270,7 @@ network. This example might require special priviledge::
# CAN frame packing/unpacking (see `struct can_frame` in <linux/can.h>)
can_frame_fmt = "=IB3x8s"
can_frame_size = struct.calcsize(can_frame_fmt)
def build_can_frame(can_id, data):
can_dlc = len(data)
@ -1286,7 +1287,7 @@ network. This example might require special priviledge::
s.bind(('vcan0',))
while True:
cf, addr = s.recvfrom(16)
cf, addr = s.recvfrom(can_frame_size)
print('Received: can_id=%x, can_dlc=%x, data=%s' % dissect_can_frame(cf))