Re: Python 3.0 crashes displaying Unicode at interactive prompt
Assuming those survived the switch to 3.0, you can use site.py und sys.displayhook to customize to the old behaviour (i.e. change it to a version using ascii instead of repr). Since this only affects interactive use, it's also no problem for portability of code, unlike "solutions" like forcing the defaultencoding etc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with sqlite3 cursor and imbricated for loop
c.execute("select * from stocks")
for s in list(c):
print s[0]
c.execute("select * from stocks where price<20")
for sp in c:
print ' '+sp[0]
c.close()
The simple addition of list() should do away with the dependency on
mysql's implementation, since it forces the instant fetch of all data.
Whether that is better than to use a 2nd cursor is probably a matter
of taste.
Using "*" in selects is always bad, though. ;)
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Re: Identifying unicode punctuation characters with Python regex
> >>> P=P.replace('\\','').replace(']','\\]') # escape both of them.
re.escape() does this w/o any assumptions by your code about the regex
implementation.
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Re: unittest exits
On 13 Nov., 20:20, "Chris Rebert" <[EMAIL PROTECTED]> wrote: > try: > unittest.main() > except SystemExit: > pass You most probably want this instead: try: unittest.main() except SystemExit, exc: # only exit if tests failed if exc.code: raise -- http://mail.python.org/mailman/listinfo/python-list
Re: An idiom for code generation with exec
Since nobody mentioned textwrap.dedent yet as an alternative to the old "if 1:" trick, I thought I should do so. :) -- http://mail.python.org/mailman/listinfo/python-list
Re: closures and dynamic binding
I didn't see this mentioned in the thread yet: the double-lambda is unnecessary (and a hack). What you should do when you need early binding is... early binding. ;) Namely: f = [lambda n=n: n for n in range(10)] print f[0]() print f[1]() Note the "n=n", this prints 0 and 1 instead of 9/9. -- http://mail.python.org/mailman/listinfo/python-list
Re: Eggs, VirtualEnv, and Apt - best practices?
Our solution consists of: * our own base python distribution, decoupled from the OS one (for various reasons, one being version independency) * distutils / setuptools / virtualenv is included in that python installation, no other eggs installed in site-packages * virtualenv + Paver to manage build environments * Paver plugins containing standard (continuous) build targets * a hand-crafted tool that builds an RPM (.deb would be easy, too) from an egg URL / filename, packaging a ready-to-run virtualenv environment into the RPM; it's a rather shallow shell above virtualenv and rpmbuild, automating the process and enforcing company standards. -- http://mail.python.org/mailman/listinfo/python-list
Re: a splitting headache
On 16 Okt., 02:18, Mensanator wrote:
> All I wanted to do is split a binary number into two lists,
> a list of blocks of consecutive ones and another list of
> blocks of consecutive zeroes.
Back to the OP's problem, the obvious (if you know the std lib) and
easy solution is:
>>> c = '00101000101'
>>> filter(None, re.split("(1+)", c))
['00', '1', '0', '1', '0', '', '00', '1', '0', '1']
In production code, you compile the regex once, of course.
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Re: Create object from variable indirect reference?
On 10 Nov., 17:03, NickC wrote:
> Many thanks for the replies. getattr() works great:
You can get a little more versatile and even specify the location of
the name (i.e. the module / package name) without pre-importing it,
like this...
def importName(modulename, name=None):
""" Import identifier C{name} from module C{modulename}.
If name is omitted, modulename must contain the name after the
module path, delimited by a colon.
@param modulename: Fully qualified module name, e.g. C{x.y.z}.
@param name: Name to import from C{modulename}.
@return: Requested object.
@rtype: object
"""
if name is None:
modulename, name = modulename.split(':', 1)
module = __import__(modulename, globals(), {}, [name])
return getattr(module, name)
print importName("socket:gethostname")()
This is especially useful if you want to specify factory classes or
the like in a non-python config file. The syntax is the same as that
of setuptools entry points.
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Re: Your beloved python features
$ python -c "import this" -- http://mail.python.org/mailman/listinfo/python-list
Re: Behavior of re.split on empty strings is unexpected
On Aug 2, 7:34 pm, John Nagle wrote: > >>> s2 = " HELLO THERE " > >>> kresplit4 = re.compile(r'\W+', re.UNICODE) > >>> kresplit4.split(s2) > ['', 'HELLO', 'THERE', ''] > > I still get empty strings. >>> re.findall(r"\w+", " a b c ") ['a', 'b', 'c'] -- http://mail.python.org/mailman/listinfo/python-list
Re: Q on explicitly calling file.close
> except: > return 0 So wrong on so many levels... -- http://mail.python.org/mailman/listinfo/python-list
