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Without more context it's hard to tell you what's wrong.

@NEngelhard is right that you may not be filling the buffer. The listener automatically fills the buffer.

Please see the tutorials: python listener and tf and time

Without more context it's hard to tell you what's wrong.

@NEngelhard is right that you may not be filling the buffer. The listener automatically fills the buffer. buffer but does need to wait to receive data.

Please see the tutorials: python listener and tf and time