blocks|key|22731|text|您可以使用ord()内置函数访问字符串中字符的代码值。如果您随后需要将其格式化为二进制，则string.format()方法将完成此工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|22732|a+=+"test"
print('+'.join(format(ord(x),+'b')+for+x+in+a))|code-block|syntax|javascript|22733|(感谢Ashwini+Chaudhary发布了该代码片段。)|22734|虽然上面的代码可以在Python3中运行，但是如果您假设使用UTF-8以外的任何编码，那么这个问题就会变得更加复杂。在Python+2中，字符串是字节序列，默认情况下采用ASCII编码。在Python3中，字符串被假定为Unicode，并且有一个单独的bytes类型，它的行为更像Python2字符串。如果您希望采用UTF-8以外的任何编码，则需要指定编码。|22735|然后，在Python+3中，您可以这样做：|22736|a+=+"test"
a_bytes+=+bytes(a,+"ascii")
print('+'.join(["{0:b}".format(x)+for+x+in+a_bytes]))|22737|对于简单的字母数字字符串，UTF-8和ascii编码之间的差异不会很明显，但如果要处理的文本包含不在ascii字符集中的字符，则UTF-8和ascii编码之间的差异将变得重要。|22738|entityMap^0|5|5|19|F|0|0|0|3I|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|16|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|18|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|V|$]]

You can access the code values for the characters in your string using the <code>ord()</code> built-in function. If you then need to format this in binary, the <code>string.format()</code> method will do the job.

<pre><code>a = "test"
print(' '.join(format(ord(x), 'b') for x in a))
</code></pre>

(Thanks to Ashwini Chaudhary for posting that code snippet.)

While the above code works in Python 3, this matter gets more complicated if you're assuming any encoding other than UTF-8. In Python 2, strings are byte sequences, and ASCII encoding is assumed by default. In Python 3, strings are assumed to be Unicode, and there's a separate <code>bytes</code> type that acts more like a Python 2 string. If you wish to assume any encoding other than UTF-8, you'll need to specify the encoding.

In Python 3, then, you can do something like this:

<pre><code>a = "test"
a_bytes = bytes(a, "ascii")
print(' '.join(["{0:b}".format(x) for x in a_bytes]))
</code></pre>

The differences between UTF-8 and ascii encoding won't be obvious for simple alphanumeric strings, but will become important if you're processing text that includes characters not in the ascii character set.

blocks|key|239237|text|像这样的东西？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|239238|>>>+st+=+"hello+world"
>>>+'+'.join(format(ord(x),+'b')+for+x+in+st)
'1101000+1100101+1101100+1101100+1101111+100000+1110111+1101111+1110010+1101100+1100100'

#using+`bytearray`
>>>+'+'.join(format(x,+'b')+for+x+in+bytearray(st,+'utf-8'))
'1101000+1100101+1101100+1101100+1101111+100000+1110111+1101111+1110010+1101100+1100100'|code-block|syntax|javascript|239239|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Something like this?

<pre><code>&gt;&gt;&gt; st = "hello world"
&gt;&gt;&gt; ' '.join(format(ord(x), 'b') for x in st)
'1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100'

#using `bytearray`
&gt;&gt;&gt; ' '.join(format(x, 'b') for x in bytearray(st, 'utf-8'))
'1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100'
</code></pre>

blocks|key|239268|text|def+method_a(sample_string):
++++binary+=+'+'.join(format(ord(x),+'b')+for+x+in+sample_string)

def+method_b(sample_string):
++++binary+=+'+'.join(map(bin,bytearray(sample_string,encoding='utf-8')))


if+__name__+==+'__main__':

++++from+timeit+import+timeit

++++sample_string+=+'Convert+this+ascii+strong+to+binary.'

++++print(
++++++++timeit(f'method_a("{sample_string}")',setup='from+__main__+import+method_a'),
++++++++timeit(f'method_b("{sample_string}")',setup='from+__main__+import+method_b')
++++)

#+9.564299999998184+2.943955828988692|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|239269|method_b在转换为字节数组方面效率更高，因为它进行低级函数调用，而不是手动将每个字符转换为整数，然后将该整数转换为其二进制值。|unstyled|239270|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>def method_a(sample_string):
 binary = ' '.join(format(ord(x), 'b') for x in sample_string)

def method_b(sample_string):
 binary = ' '.join(map(bin,bytearray(sample_string,encoding='utf-8')))


if __name__ == '__main__':

 from timeit import timeit

 sample_string = 'Convert this ascii strong to binary.'

 print(
 timeit(f'method_a("{sample_string}")',setup='from __main__ import method_a'),
 timeit(f'method_b("{sample_string}")',setup='from __main__ import method_b')
 )

# 9.564299999998184 2.943955828988692
</code></pre>

method_b is substantially more efficient at converting to a byte array because it makes low level function calls instead of manually transforming every character to an integer, and then converting that integer into its binary value.

blocks|key|22822|text|我们只需要对它进行编码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|22823|'string'.encode('ascii')|code-block|syntax|javascript|22824|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

We just need to encode it.

<pre><code>'string'.encode('ascii')
</code></pre>

blocks|key|22834|text|a+=+list(input("Enter+a+string\t:+"))
def+fun(a):
++++c+='+'.join(['0'*(8-len(bin(ord(i))[2:]))%2B(bin(ord(i))[2:])+for+i+in+a])
++++return+c
print(fun(a))|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|22835|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>a = list(input("Enter a string\t: "))
def fun(a):
 c =' '.join(['0'*(8-len(bin(ord(i))[2:]))+(bin(ord(i))[2:]) for i in a])
 return c
print(fun(a))
</code></pre>

I am in need of a way to get the binary representation of a string in python. e.g. 

<pre><code>st = "hello world"
toBinary(st)
</code></pre>

Is there a module of some neat way of doing this?

How to convert string to binary?

我需要一种方法来获得python中字符串的二进制表示。例如：st = "hello world"toBinary(st)有没有一种简洁的方法来实现这一点呢？

问如何将字符串转换为二进制？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何将字符串转换为二进制？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何将字符串转换为二进制？
EN