'str' 不支持 Python2 的缓冲区接口 Python3
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'str' does not support the buffer interface Python3 from Python2
提问by Daniel Domingo
Hi have this two funtions in Py2 works fine but it doesn′t works on Py3
嗨，这两个功能在 Py2 中工作正常，但在 Py3 上不起作用
def encoding(text, codes):
binary = ''
f = open('bytes.bin', 'wb')
for c in text:
binary += codes[c]
f.write('%s' % binary)
print('Text in binary:', binary)
f.close()
return len(binary)
def decoding(codes, large):
f = file('bytes.bin', 'rb')
bits = f.read(large)
tmp = ''
decode_text = ''
for bit in bits:
tmp += bit
if tmp in fordecodes:
decode_text += fordecodes[tmp]
tmp = ''
f.close()
return decode_text
The console ouputs this:
控制台输出：
Traceback (most recent call last):
File "Practica2.py", line 83, in <module>
large = encoding(text, codes)
File "Practica2.py", line 56, in encoding
f.write('%s' % binary)
TypeError: 'str' does not support the buffer interface
回答by ekhumoro
In Python 2, bare literal strings (e.g. 'string') are bytes, whereas in Python 3 they are unicode. This means if you want literal strings to be treated as bytes in Python 3, you always have to explicitly mark them as such.
在 Python 2 中，裸文字字符串（例如'string'）是bytes，而在 Python 3 中它们是unicode。这意味着如果您希望在 Python 3 中将文字字符串视为字节，则始终必须明确标记它们。
So, for instance, the first few lines of the encodingfunction should look like this:
因此，例如，该encoding函数的前几行应如下所示：
binary = b''
f = open('bytes.bin', 'wb')
for c in text:
binary += codes[c]
f.write(b'%s' % binary)
and there are a few lines in the other function which need similar treatment.
并且其他函数中有几行需要类似的处理。
See Porting to Python 3, and the section Bytes, Strings and Unicodefor more details.
有关更多详细信息，请参阅移植到 Python 3以及字节、字符串和 Unicode部分。
回答by Jimmy
The fix was simple for me
修复对我来说很简单
Use
用
f = open('bytes.bin', 'w')
instead of
代替
f = open('bytes.bin', 'wb')
In python 3 'w'is what you need, not 'wb'.
在 python 3 中'w'是你需要的，而不是'wb'.
