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During the installation process, if there is no Pip, Python needs to be installed first and then Pip needs to be installed. The process is as shown in the figure:今年，似乎留下来的学子比往年更多，张家和郑家额外加派了许多人手去酒家照应。一边爬上岸来，把**的裤子就这么往身上套。< h2 > This is a heading Many of the big V's who participate in Oppo topics and hold Oppo mobile phones are Oppo partners.As mentioned above, SYN attacks can be prevented by increasing the backlog queue. In addition, reducing timeout time also enables the system to process more SYN requests. We know that the timeout timeout, that is, the half-connection lifetime, is the sum of the timeout times that the system waits for all retransmissions. The larger this value, the longer the half-connection takes up the backlog queue and the fewer SYN requests the system can handle. In order to shorten the timeout time, it can be realized by shortening the retransmission timeout time (usually the first retransmission timeout time) and reducing the number of retransmissions.