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Echo client with deadlock

import socket, sys port = 55555 host = 'localhost' data = "test" * 10485760                  # 40MB of data s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, port)) byteswritten = 0 while byteswritten < len(data):     startpos = byteswritten     endpos = min(byteswritten + 1024, len(data))     byteswritten += s.send(data[startpos:endpos])     sys.stdout.write("Wrote %d bytes\r" % byteswritten)     sys.stdout.flush()      s.shutdown(1) print "All data sent." while 1:     buf = s.recv(1024)     if not len(buf):         break     sys.stdout.write(buf)