nn wrote:
I know that unicode is the way to go in Python 3.1, but it is getting
in my way right now in my Unix scripts. How do I write a chr(253) to a
file?
Python3 make a distinction between bytes and string(i.e., unicode)
types, and you are still thinking in the Python2 mode that does *NOT*
make such a distinction. What you appear to want is to write a
particular byte to a file -- so use the bytes type and a file open in
binary mode:
>>> b=bytes([253])
>>> f = open("abc", 'wb')
>>> f.write(b)
1
>>> f.close()
On unix (at least), the "od" program can verify the contents is correct:
> od abc -d
0000000 253
0000001
Hope that helps.
Gary Herron
#nntst2.py
import sys,codecs
mychar=chr(253)
print(sys.stdout.encoding)
print(mychar)
> ./nntst2.py
ISO8859-1
ý
> ./nntst2.py >nnout2
Traceback (most recent call last):
File "./nntst2.py", line 5, in <module>
print(mychar)
UnicodeEncodeError: 'ascii' codec can't encode character '\xfd' in
position 0: ordinal not in range(128)
cat nnout2
ascii
..Oh great!
ok lets try this:
#nntst3.py
import sys,codecs
mychar=chr(253)
print(sys.stdout.encoding)
print(mychar.encode('latin1'))
./nntst3.py
ISO8859-1
b'\xfd'
./nntst3.py >nnout3
cat nnout3
ascii
b'\xfd'
..Eh... not what I want really.
#nntst4.py
import sys,codecs
mychar=chr(253)
print(sys.stdout.encoding)
sys.stdout=codecs.getwriter("latin1")(sys.stdout)
print(mychar)
> ./nntst4.py
ISO8859-1
Traceback (most recent call last):
File "./nntst4.py", line 6, in <module>
print(mychar)
File "Python-3.1.2/Lib/codecs.py", line 356, in write
self.stream.write(data)
TypeError: must be str, not bytes
..OK, this is not working either.
Is there any way to write a value 253 to standard output?
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