blocks|key|628335|text|从Python3.5开始，这终于不再尴尬了：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|628336|>>>+b'\xde\xad\xbe\xef'.hex()
'deadbeef'|code-block|syntax|javascript|628337|和反转：|628338|>>>+bytes.fromhex('deadbeef')
b'\xde\xad\xbe\xef'|628339|也适用于可变的bytearray类型。|offset|length|style|CODE|628340|参考：https://docs.python.org/3/library/stdtypes.html#bytes.hex|628341|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3/library/stdtypes.html#bytes.hex^0|0|0|0|0|7|9|0|3|1L|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@$M|15|N|16|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|17|8|@]|9|@$M|18|N|19|1|1A]]|A|$]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

Since Python 3.5 this is finally no longer awkward:

<pre><code>&gt;&gt;&gt; b'\xde\xad\xbe\xef'.hex()
'deadbeef'
</code></pre>

and reverse:

<pre><code>&gt;&gt;&gt; bytes.fromhex('deadbeef')
b'\xde\xad\xbe\xef'
</code></pre>

works also with the mutable <code>bytearray</code> type.

Reference: <a href="https://docs.python.org/3/library/stdtypes.html#bytes.hex" rel="noreferrer">https://docs.python.org/3/library/stdtypes.html#bytes.hex</a>

blocks|key|843897|text|使用binascii模块：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|843898|>>>+import+binascii
>>>+binascii.hexlify('foo'.encode('utf8'))
b'666f6f'
>>>+binascii.unhexlify(_).decode('utf8')
'foo'|code-block|syntax|javascript|843899|请看这个答案：Python+3.1.1+string+to+hex|843900|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2340319/python-3-1-1-string-to-hex/2340358#2340358^0|2|8|0|0|7|Q|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Use the <code>binascii</code> module:

<pre><code>&gt;&gt;&gt; import binascii
&gt;&gt;&gt; binascii.hexlify('foo'.encode('utf8'))
b'666f6f'
&gt;&gt;&gt; binascii.unhexlify(_).decode('utf8')
'foo'
</code></pre>

See this answer:
<a href="https://stackoverflow.com/questions/2340319/python-3-1-1-string-to-hex/2340358#2340358">Python 3.1.1 string to hex</a>

blocks|key|844124|text|Python3.8中的新特性是可以将分隔符参数传递给hex函数，如下例所示|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|844125|>>>+value+=+b'\xf0\xf1\xf2'
>>>+value.hex('-')
'f0-f1-f2'
>>>+value.hex('_',+2)
'f0_f1f2'
>>>+b'UUDDLRLRAB'.hex('+',+-4)
'55554444+4c524c52+4142'|code-block|syntax|javascript|844126|https://docs.python.org/3/library/stdtypes.html#bytes.hex|844127|entityMap|0|LINK|mutability|MUTABLE|url^0|Q|3|0|0|0|1L|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|X|8|@]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|L]]]]

New in python 3.8, you can pass a delimiter argument to the <code>hex</code> function, as in this example

<pre><code>&gt;&gt;&gt; value = b'\xf0\xf1\xf2'
&gt;&gt;&gt; value.hex('-')
'f0-f1-f2'
&gt;&gt;&gt; value.hex('_', 2)
'f0_f1f2'
&gt;&gt;&gt; b'UUDDLRLRAB'.hex(' ', -4)
'55554444 4c524c52 4142'
</code></pre>

<a href="https://docs.python.org/3/library/stdtypes.html#bytes.hex" rel="noreferrer">https://docs.python.org/3/library/stdtypes.html#bytes.hex</a>

blocks|key|843967|text|方法binascii.hexlify()将bytes转换为表示ASCII十六进制字符串的bytes。这意味着输入中的每个字节都将转换为两个ascii字符。如果你想要一个真正的结果，那么你可以.decode("ascii")这个结果。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|843968|我提供了一个说明它的代码片段。|843969|import+binascii

with+open("addressbook.bin",+"rb")+as+f:+#+or+any+binary+file+like+'/bin/ls'
++++in_bytes+=+f.read()
++++print(in_bytes)+#+b'\n\x16\n\x04'
++++hex_bytes+=+binascii.hexlify(in_bytes)+
++++print(hex_bytes)+#+b'0a160a04'+which+is+twice+as+long+as+in_bytes
++++hex_str+=+hex_bytes.decode("ascii")
++++print(hex_str)+#+0a160a04|code-block|syntax|javascript|843970|从十六进制字符串"0a160a04"可以返回到带有binascii.unhexlify("0a160a04")的bytes，它返回b'\n\x16\n\x04'|843971|entityMap^0|2|I|L|5|18|5|2N|G|0|0|0|8|A|P|U|1K|5|1T|F|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|P|$]]

The method <code>binascii.hexlify()</code> will convert <code>bytes</code> to a <code>bytes</code> representing the ascii hex string. That means that each byte in the input will get converted to two ascii characters. If you want a true <code>str</code> out then you can <code>.decode("ascii")</code> the result. 

I included an snippet that illustrates it. 

<pre><code>import binascii

with open("addressbook.bin", "rb") as f: # or any binary file like '/bin/ls'
 in_bytes = f.read()
 print(in_bytes) # b'\n\x16\n\x04'
 hex_bytes = binascii.hexlify(in_bytes) 
 print(hex_bytes) # b'0a160a04' which is twice as long as in_bytes
 hex_str = hex_bytes.decode("ascii")
 print(hex_str) # 0a160a04
</code></pre>

from the hex string <code>"0a160a04"</code> to can come back to the <code>bytes</code> with <code>binascii.unhexlify("0a160a04")</code> which gives back <code>b'\n\x16\n\x04'</code>

blocks|key|628229|text|import+codecs
codecs.getencoder('hex_codec')(b'foo')[0]|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|628230|在Python3.3中工作(所以"hex_codec“而不是"hex")。|unstyled|628231|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>import codecs
codecs.getencoder('hex_codec')(b'foo')[0]
</code></pre>

works in Python 3.3 (so "hex_codec" instead of "hex").

blocks|key|628396|text|它可以用于格式化和输出十六进制值的格式说明符%25x02。例如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|628397|>>>+foo+=+b"tC\xfc}\x05i\x8d\x86\x05\xa5\xb4\xd3]Vd\x9cZ\x92~'6"
>>>+res+=+""
>>>+for+b+in+foo:
...+++++res+%2B=+"%2502x"+%25+b
...+
>>>+print(res)
7443fc7d05698d8605a5b4d35d56649c5a927e2736|code-block|syntax|javascript|628398|entityMap^0|M|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

it can been used the format specifier <code>%x02</code> that format and output a hex value. For example:

<pre><code>&gt;&gt;&gt; foo = b"tC\xfc}\x05i\x8d\x86\x05\xa5\xb4\xd3]Vd\x9cZ\x92~'6"
&gt;&gt;&gt; res = ""
&gt;&gt;&gt; for b in foo:
... res += "%02x" % b
... 
&gt;&gt;&gt; print(res)
7443fc7d05698d8605a5b4d35d56649c5a927e2736
</code></pre>

blocks|key|844055|text|如果您想将b'\x61‘转换为97或'0x61'，您可以尝试执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|844056|[python3.5]
>>>from+struct+import+*
>>>temp=unpack('B',b'\x61')[0]+##+convert+bytes+to+unsigned+int
97
>>>hex(temp)+##convert+int+to+string+which+is+hexadecimal+expression
'0x61'|code-block|syntax|javascript|844057|参考：https://docs.python.org/3.5/library/struct.html|offset|length|844058|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3.5/library/struct.html^0|0|0|3|1B|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

If you want to convert b'\x61' to 97 or '0x61', you can try this:

<pre><code>[python3.5]
&gt;&gt;&gt;from struct import *
&gt;&gt;&gt;temp=unpack('B',b'\x61')[0] ## convert bytes to unsigned int
97
&gt;&gt;&gt;hex(temp) ##convert int to string which is hexadecimal expression
'0x61'
</code></pre>

Reference:<a href="https://docs.python.org/3.5/library/struct.html" rel="nofollow noreferrer">https://docs.python.org/3.5/library/struct.html</a>

What's the correct way to convert bytes to a hex string in Python 3?

I see claims of a <code>bytes.hex</code> method, <code>bytes.decode</code> codecs, and have tried <a href="http://docs.python.org/py3k/library/functions.html#hex" rel="noreferrer">other</a> possible functions of least astonishment without avail. I just want my bytes as hex!

What's the correct way to convert bytes to a hex string in Python 3?

在Python3中将字节转换为十六进制字符串的正确方法是什么？我看到了bytes.hex方法的声明，bytes.decode编解码器，并尝试了可能的功能，最不令人惊讶，但没有用。我只希望我的字节是十六进制的！

问在Python3中将字节转换为十六进制字符串的正确方法是什么？
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问在Python3中将字节转换为十六进制字符串的正确方法是什么？
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