如何在一行中的套接字连接的发送方法中将字符串编码为字节? [英] How do I encode a string to bytes in the send method of a socket connection in one line?

问题描述

在 Python 3.5 中，使用套接字，我有:

In Python 3.5, using sockets, I have:

message = 'HTTP/1.1 200 OK\nContent-Type: text/html\n\n'
s.send(message.encode())

我怎样才能在一行中做到这一点?我问是因为我有:

How can I do that in one line? I ask because I had:

s.send('HTTP/1.1 200 OK\nContent-Type: text/html\n\n')

但在 Python 中需要 3.5 个字节，而不是字符串，因此会出现错误:

but in Python 3.5 bytes are required, not a string, so this gives the error:

builtins.TypeError: a bytes-like object is required, not 'str'

我不应该使用发送吗?

推荐答案

str，text的类型，与bytes不一样>，八位字序列的类型.为了简洁地从一个转换到另一个，您可以将调用内联到 encode(就像您可以使用任何函数调用一样)...

str, the type of text, is not the same as bytes, the type of sequences of eight-bit words. To concisely convert from one to the other, you could inline the call to encode (just as you could with any function call)...

s.send('HTTP/1.1 200 OK\nContent-Type: text/html\n\n'.encode())

...记住，指定要使用的编码通常是个好主意...

.. bearing in mind that it's often a good idea to specify the encoding you want to use...

s.send('HTTP/1.1 200 OK\nContent-Type: text/html\n\n'.encode('ascii'))

...但使用字节文字更简单.用 b 前缀你的字符串:

... but it's simpler to use a bytes literal. Prefix your string with a b:

s.send(b'HTTP/1.1 200 OK\nContent-Type: text/html\n\n')

但你知道什么更简单吗?让别人为你做 HTTP.你有没有想过使用像 Flask 这样的服务器，甚至 标准库，构建您的应用程序?

But you know what's even simpler? Letting someone else do HTTP for you. Have you thought about using a server such as Flask, or even the standard library, to build your app?

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