I have a browser which sends utf-8 characters to my Python server, but when I retrieve it from the query string, the encoding that Python returns is ASCII. How can I convert the plain string to utf-8?
NOTE: The string passed from the web is already UTF-8 encoded, I just want to make Python to treat it as UTF-8 not ASCII.
"some_string".encode('utf-8').decode('utf-8')
In Python 2
>>> plain_string = "Hi!"
>>> unicode_string = u"Hi!"
>>> type(plain_string), type(unicode_string)
(<type 'str'>, <type 'unicode'>)
^ This is the difference between a byte string (plain_string) and a unicode string.
>>> s = "Hello!"
>>> u = unicode(s, "utf-8")
^ Converting to unicode and specifying the encoding.
In Python 3
All strings are unicode. The unicode
function does not exist anymore. See answer from @Noumenon
If the methods above don't work, you can also tell Python to ignore portions of a string that it can't convert to utf-8:
stringnamehere.decode('utf-8', 'ignore')
Might be a bit overkill, but when I work with ascii and unicode in same files, repeating decode can be a pain, this is what I use:
def make_unicode(inp):
if type(inp) != unicode:
inp = inp.decode('utf-8')
return inp
unicode
type doesn't exist in python3
Adding the following line to the top of your .py file:
# -*- coding: utf-8 -*-
allows you to encode strings directly in your script, like this:
utfstr = "ボールト"
from __future__ import unicode_literals
at the top or use u''
prefix. Don't use non-ascii characters in bytes
literals. To get utf-8 bytes, you could utf8bytes = unicode_text.encode('utf-8')
later if it is necessary.
from __future__ import unicode_literals
help me to convert a string with non-ascii characters to utf-8?
If I understand you correctly, you have a utf-8 encoded byte-string in your code.
Converting a byte-string to a unicode string is known as decoding (unicode -> byte-string is encoding).
You do that by using the unicode function or the decode method. Either:
unicodestr = unicode(bytestr, encoding)
unicodestr = unicode(bytestr, "utf-8")
Or:
unicodestr = bytestr.decode(encoding)
unicodestr = bytestr.decode("utf-8")
city = 'Ribeir\xc3\xa3o Preto'
print city.decode('cp1252').encode('utf-8')
In Python 3.6, they do not have a built-in unicode() method. Strings are already stored as unicode by default and no conversion is required. Example:
my_str = "\u221a25"
print(my_str)
>>> √25
Translate with ord() and unichar(). Every unicode char have a number asociated, something like an index. So Python have a few methods to translate between a char and his number. Downside is a ñ example. Hope it can help.
>>> C = 'ñ'
>>> U = C.decode('utf8')
>>> U
u'\xf1'
>>> ord(U)
241
>>> unichr(241)
u'\xf1'
>>> print unichr(241).encode('utf8')
ñ
First, str in Python is represented in Unicode.
Second, UTF-8 is an encoding standard to encode Unicode string to bytes. There are many encoding standards out there (e.g. UTF-16, ASCII, SHIFT-JIS, etc.).
When the client sends data to your server and they are using UTF-8
, they are sending a bunch of bytes
not str
.
You received a str
because the "library" or "framework" that you are using, has implicitly converted some random bytes
to str
.
Under the hood, there is just a bunch of bytes
. You just need ask the "library" to give you the request content in bytes
and you will handle the decoding yourself (if library can't give you then it is trying to do black magic then you shouldn't use it).
Decode UTF-8 encoded bytes to str: bs.decode('utf-8')
Encode str to UTF-8 bytes: s.encode('utf-8')
you can also do this:
from unidecode import unidecode
unidecode(yourStringtoDecode)
unidecode
? Is it this pypi.org/project/Unidecode? Please provide info if it's a 3rd-party package, and how to install/use it.
You can use python's standard library codecs
module.
import codecs
codecs.decode(b'Decode me', 'utf-8')
Yes, You can add
# -*- coding: utf-8 -*-
in your source code's first line.
You can read more details here https://www.python.org/dev/peps/pep-0263/
Success story sharing
UnicodeDecodeError: 'utf8' codec can't decode byte 0xb0 in position 2: invalid start byte
This is my code: ret=[] for line in csvReader: cline=[] for elm in line: unicodestr = unicode(elm, 'utf-8') cline.append(unicodestr) ret.append(cline)unicode()
doesn't exist.u
back to astr
format (convertu
back tos
)?"2340"
in a string variable, and you want to print the unicode characterU+2340
(⍀), is there any way to do that?