How to write string as unicode byte in python? - python-3.x

When i write '你' in agend and save it as test-unicode.txt in unicode mode,open it with xxd g:\\test-unicode.txt ,i got :
0000000: fffe 604f ..`O
1.fffe stand for little endian
2.the unicode of 你 is \x4f\x60
I want to write the 你 as 604f or 4f60 in the file.
output=open("g://test-unicode.txt","wb")
str1="你"
output.write(str1)
output.close()
error:
TypeError: 'str' does not support the buffer interface
When i change it into the following ,there is no errror.
output=open("g://test-unicode.txt","wb")
str1="你"
output.write(str1.encode())
output.close()
when open it with xxd g:\\test-unicode.txt ,i got :
0000000: e4bd a0 ...
How can i write 604f or 4f60 into my file the same way as microsoft aengda do(save as unicode format)?

"Unicode" as an encoding is actually UTF-16LE.
with open("g:/test-unicode.txt", "w", encoding="utf-16le") as output:
output.write(str1)

Related

Can not build sphinx excerpts while keeping original langunge text

I need to build a excerpt from Arabic text and keep the original language for display purpose of the excerpt. But the problem is if I feed the Arabic text direct to BuildExcerpt function it gave the following error.
'{"دولة": "فلسطين", "مصدر": "وزارة الاقتصاد الوطني", "رقم الشركة": "563420595", "اسم الشركة": "شركة حسان الغرابلي وشركاه للتجارة العامة", "عنوان الشركة": "غزة - الشجاعية", "نوع الشركة": "شركة مسجلة", "تاريخ التسجيل": "1994-07-03", "الهاتف": "", "راس مال الشركة": "0 دينار أردني", "مفوضون": "الشركاء مجتمعين"}'
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x84 in position 5: invalid start byte
As a workaround I used unidecode module and feed the converted text to BuildExcerpt. Then the original language encoding is missing and can not rebuild it again from the excerpt. See the output below.
[' ... -03", "lhtf": "", "rs ml lshrk#": "<b>0</b> dynr \'rdny", "mfwDwn": "lshrk mjtm ... ']
Is there way I can keep the original language encoding for the excerpt?

How to decode the byte into string in python3

After receiving the bytes from Server, it needs to convert into string. When I try below code, not works per expected.
a
Out[140]: b'NC\x00\x00\x00'
a.decode()
Out[141]: 'NC\x00\x00\x00'
a.decode('ascii')
Out[142]: 'NC\x00\x00\x00'
a.decode('ascii').strip()
Out[143]: 'NC\x00\x00\x00'
a.decode('utf-8').strip()
Out[147]: 'NC\x00\x00\x00'
# I need the Output as 'NC'
This is not an encoding issue, as the trailing bytes are all NUL bytes. Looks like your server is padding with Null bytes. To remove them just use
a.strip(b'\x00')

encoding utf-8 on linux

I have a file CreateTable.sql. When I do :
file --mime-encoding CreateTable.sql
The result is :
CreateTable.sql: utf-8
The command :
lot of things ...
UNICODE, UNICODEBIG, UNICODELITTLE, US-ASCII, US, UTF-7, UTF-8, UTF-16,
UTF-16BE, UTF-16LE, UTF-32, UTF-32BE, UTF-32LE, UTF7, UTF8, UTF16, UTF16BE,
UTF16LE, UTF32, UTF32BE, UTF32LE, VISCII, WCHAR_T, WIN-SAMI-2, WINBALTRIM,
lot of things
But the command more on the file CreateTable.sql print :
CREATE TYPE enum_branchement_moderattachement AS ENUM(
$$Inconnu$$,
$$Relatif par rapport à l'amont électrique$$,
$$N'a jamais été rattaché$$,
$$Géographique$$,
$$Détaché$$,
$$Simplifié$$
);
What I did wrong ?
I solved my problem with those lines :
echo $LANG
that give me fr_FR
export LANG=fr_FR.utf8
Hope that can help someone else.

can anyone tell me what the encoding of this string is? Its meant to be base64

cpxSR2bnPUihaNxIFFA8Sc+8gUnWuJxJi8ywSW5ju0npWrFJHW2MSZAeMklcZ71IjrBySF2ci0gdecRI0vD/SM4ZF0m1ZSJJBY8bSZJl/0intaxIlQJBSPdY3EdBLM9Hp4wLSOK8Nki8L1pIoglxSAvNbkjHg0VIDlv7R6B2Y0elCqVGFWuVRgagAkdxHTdHELxRR9i2VkdyEUlHU84kRzTS2kalKFxG
This is a string from an XML file from my mass spectrometer. I am trying to write a program to load two such files, subtract one set of values from another, and write the results to a new file. According to the specification file for the .mzML format, the encoding of the numerical data is alleged to be base64. I can't convert this data string to anything legible using any of the many online base64 converter or using NotepaD++ and the MIME toolkit's base64 converter.
The string, in the context of the results file, looks like this:
<binaryDataArray encodedLength="224">
<cvParam cvRef="MS" accession="MS:1000515" name="intensity array" unitAccession="MS:1000131" unitName="number of counts" unitCvRef="MS"/>
<cvParam cvRef="MS" accession="MS:1000521" name="32-bit float" />
<cvParam cvRef="MS" accession="MS:1000576" name="no compression" />
<binary>cpxSR2bnPUihaNxIFFA8Sc+8gUnWuJxJi8ywSW5ju0npWrFJHW2MSZAeMklcZ71IjrBySF2ci0gdecRI0vD/SM4ZF0m1ZSJJBY8bSZJl/0intaxIlQJBSPdY3EdBLM9Hp4wLSOK8Nki8L1pIoglxSAvNbkjHg0VIDlv7R6B2Y0elCqVGFWuVRgagAkdxHTdHELxRR9i2VkdyEUlHU84kRzTS2kalKFxG</binary>
I can't proceed until I can work out what format this encoding is meant to be!
Thanks in advance for any replies.
You can use this trivial program to convert it to plaintext:
#include <stdio.h>
int main(void)
{
float f;
while (fread(&f, 1, 4, stdin) == 4)
printf("%f\n", f);
}
I compiled this to "floatdecode" and used this command:
echo "cpxSR2bnPUihaNxIFFA8Sc+8gUnWuJxJi8ywSW5ju0npWrFJHW2MSZAeMklcZ71IjrBySF2ci0gdecRI0vD/SM4ZF0m1ZSJJBY8bSZJl/0intaxIlQJBSPdY3EdBLM9Hp4wLSOK8Nki8L1pIoglxSAvNbkjHg0VIDlv7R6B2Y0elCqVGFWuVRgagAkdxHTdHELxRR9i2VkdyEUlHU84kRzTS2kalKFxG" | base64 -d | ./floatdecode
Output is:
53916.445312
194461.593750
451397.031250
771329.250000
1062809.875000
1283866.750000
1448337.375000
1535085.750000
1452893.125000
1150371.625000
729577.000000
387898.875000
248514.218750
285922.906250
402376.906250
524166.562500
618908.875000
665179.312500
637168.312500
523052.562500
353709.218750
197642.328125
112817.929688
106072.507812
142898.609375
187123.531250
223422.937500
246822.531250
244532.171875
202255.109375
128694.109375
58230.625000
21125.322266
19125.541016
33440.023438
46877.441406
53692.062500
54966.843750
51473.445312
42190.324219
28009.101562
14090.161133
Yet another Java Base64 decode with options to uncompress should you need it.
Vendor spec indicated "32-bit float" = IEEE-754 and specified little-endian.
Schmidt's converter shows the bit pattern for IEEE-754.
One more Notepad++ step to look at the hex codes:
Notepad++ TextFX plugin (after the Base64 decode you already did)
select the text
TextFX > TextFX Convert > Convert text to Hex-32
lets you look at the hex codes:
"000000000 72 9C 52 47 66 E7 3D 48- ... 6E 63 BB 49 |rœRGfç=H¡hÜHP
Little-endian: 47529C72 converts (via Schmidt) as shown above by David.
You can access such data from mzML files in Python through pymzML, a python interface to mzML files.
http://pymzml.github.com/

how to revert a binary dump file?

a binary dump file is like a hex dump file except that it is in binary form instead of hex
now I've got a binary dump file looks like this:
01101110 01101100 01000001 01000001 01000001 00101011 00110001 01011010
01001000 00110100 01110011 01001001 01000001 01000011 01001010 01001011
...
and I know the original file was a normal text file, so how can I revert or say recover it from the dump file?
you can use python, something like this:
import re
f = open('dump', 'r')
token= re.split(r'[ \n]', f.read())
map (lambda (t): chr(int(t, 2)), token)
based on: http://www.unix.com/programming/8680-binary-text-format-conversion.html
sounds like uuencode is your friend :)
I checked it and on my Fedora 17 package is called: perl-Convert-UU

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