Python converts UTF-8 files into gbk files,

Python converts UTF-8 files into gbk files,

Requirement: Convert UTF-8 files into gbk files

The implementation code is as follows:

Copy codeThe Code is as follows:
Def ReadFile (filePath, encoding = "UTF-8 "):
With codecs. open (filePath, "r", encoding) as f:
Return f. read ()
 
Def WriteFile (filePath, u, encoding = "gbk "):
With codecs. open (filePath, "w", encoding) as f:
F. write (u)
 
Def UTF8_2_GBK (src, dst ):
Content = ReadFile (src, encoding = "UTF-8 ")
WriteFile (dst, content, encoding = "gbk ")

Code Description:

The second parameter of the ReadFile function specifies to read files in UTF-8 format. The returned content is Unicode and then Unicode is written into the file in gbk format.

In this way, the requirements can be met.
However, if the file to be converted contains some characters that are not included in the gbk character set, an error is returned, similar to the following:
Copy codeThe Code is as follows:
UnicodeEncodeError: 'gbk' codec can't encode character U' \ xa0' in position 4813: illegal multibyte sequence

The preceding error message indicates that Unicode U' \ xa0' cannot be encoded into gbk when Unicode is encoded as gbk.

Here, we need to figure out the relationship between gb2312, gbk, and gb18030.
Copy codeThe Code is as follows:
GB2312: 6763 Chinese Characters
GBK: 21003 Chinese Characters
GB18030-2000: 27533 Chinese Characters
GB18030-2005: 70244 Chinese Characters

Therefore, GBK is the superset of GB2312 and GB18030 is the superset of GBK.
After clarifying the relationship, we can further improve the Code:
Copy codeThe Code is as follows:
Def UTF8_2_GBK (src, dst ):
Content = ReadFile (src, encoding = "UTF-8 ")
WriteFile (dst, content, encoding = "gb18030 ")

After running, no error is reported and it can run properly.

Because the characters corresponding to U' \ xa0' can be found in the GB18030 character set.
In addition, there is another Implementation Scheme:
You need to modify the WriteFile method.
Copy codeThe Code is as follows:
Def WriteFile (filePath, u, encoding = "gbk "):
With codecs. open (filePath, "w") as f:
F. write (u. encode (encoding, errors = "ignore "))

Here, we convert Unicode encoding (encode) into gbk format, but note that the second parameter of the encode function is assigned "ignore", indicating that during encoding, ignore unencoded characters, and the decoding is the same.

However, after execution, we found that UTF-8 files can be successfully modified to the ansi format. However, in the generated file, each row has a blank line.

Here, you can specify the file to be written as a binary stream. The modified code is as follows:
Copy codeThe Code is as follows:
Def WriteFile (filePath, u, encoding = "gbk "):
With codecs. open (filePath, "wb") as f:
F. write (u. encode (encoding, errors = "ignore "))