TypeError: 'str' does not support the buffer interface
plaintext = input("Please enter the text you want to compress")
filename = input("Please enter the desired filename")
with gzip.open(filename + ".gz", "wb") as outfile:
outfile.write(plaintext)
上面的python代码给了我下面的错误：
Traceback (most recent call last):
File "C:/Users/Ankur Gupta/Desktop/Python_works/gzip_work1.py", line 33, in <module>
compress_string()
File "C:/Users/Ankur Gupta/Desktop/Python_works/gzip_work1.py", line 15, in compress_string
outfile.write(plaintext)
File "C:Python32libgzip.py", line 312, in write
self.crc = zlib.crc32(data, self.crc) & 0xffffffff
TypeError: 'str' does not support the buffer interface
If you use Python3x then string is not the same type as for Python 2.x, you must cast it to bytes (encode it).
plaintext = input("Please enter the text you want to compress")
filename = input("Please enter the desired filename")
with gzip.open(filename + ".gz", "wb") as outfile:
outfile.write(bytes(plaintext, 'UTF-8'))
Also do not use variable names like string or file while those are names of module or function.
EDIT @Tom
Yes, non-ASCII text is also compressed/decompressed. I use Polish letters with UTF-8 encoding:
plaintext = 'Polish text: ąćęłńóśźżĄĆĘŁŃÓŚŹŻ'
filename = 'foo.gz'
with gzip.open(filename, 'wb') as outfile:
outfile.write(bytes(plaintext, 'UTF-8'))
with gzip.open(filename, 'r') as infile:
outfile_content = infile.read().decode('UTF-8')
print(outfile_content)
There is an easier solution to this problem.
You just need to add a t to the mode so it becomes wt . This causes Python to open the file as a text file and not binary. Then everything will just work.
The complete program becomes this:
plaintext = input("Please enter the text you want to compress")
filename = input("Please enter the desired filename")
with gzip.open(filename + ".gz", "wt") as outfile:
outfile.write(plaintext)
You can not serialize a Python 3 'string' to bytes without explict conversion to some encoding.
outfile.write(plaintext.encode('utf-8'))
is possibly what you want. Also this works for both python 2.x and 3.x.
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