大约有 11,000 项符合查询结果（耗时：0.0255秒） [XML]
multiprocessing.Pool: When to use apply, apply_async or map?
...
Back in the old days of Python, to call a function with arbitrary arguments, you would use apply:
apply(f,args,kwargs)
apply still exists in Python2.7 though not in Python3, and is generally not used anymore. Nowadays,
f(*args,**kwargs)
is pr...
Get protocol + host name from URL
...
You should be able to do it with urlparse (docs: python2, python3):
from urllib.parse import urlparse
# from urlparse import urlparse # Python 2
parsed_uri = urlparse('http://stackoverflow.com/questions/1234567/blah-blah-blah-blah' )
result = '{uri.scheme}://{uri.netloc}/...
Maximum length of the textual representation of an IPv6 address?
...
On Linux, see constant INET6_ADDRSTRLEN (include <arpa/inet.h>, see man inet_ntop). On my system (header "in.h"):
#define INET6_ADDRSTRLEN 46
The last character is for terminating NULL, as I belive, so the max length is...
Rank items in an array using Python/NumPy, without sorting array twice
...array that represents the rank of each item in the first array. I'm using Python and NumPy.
11 Answers
...
What's the best way of scraping data from a website? [closed]
...ited for this task and the library/framework support is poor in this area. Python (Scrapy is a great starting point) and Clojure/Clojurescript (incredibly powerful and productive but a big learning curve) are great languages for this problem. Since you would rather not learn a new language and you a...
Python Nose Import Error
...ase, nosetests was the one in /usr/bin/nosetests, which was using /usr/bin/python. The packages in the virtualenv definitely won't be in the system path. The following fixed this:
source myvirtualenv/activate
pip install nose
which nosetests
/home/me/myvirtualenv/bin/nosetests
...
LF will be replaced by CRLF in git - What is that and is it important? [duplicate]
...er
and a linefeed character for newlines in its files, whereas Mac and
Linux systems use only the linefeed character. This is a subtle but
incredibly annoying fact of cross-platform work; many editors on
Windows silently replace existing LF-style line endings with CRLF, or
insert both line...
How do you check whether a number is divisible by another number (Python)?
...
E.g. try x=10000000000000000; b = str(x/(x-1)); b in the python interpreter.
– NickD
Oct 18 '19 at 15:08
add a comment
|
...
How can I extract the folder path from file path in Python?
...hould consider using pathlib for new development. It is in the stdlib for Python3.4, but available on PyPI for earlier versions. This library provides a more object-orented method to manipulate paths <opinion> and is much easier read and program with </opinion>.
>>> import pa...
Python Regex instantly replace groups
...re.sub:
result = re.sub(r"(\d.*?)\s(\d.*?)", r"\1 \2", string1)
This is Python's regex substitution (replace) function. The replacement string can be filled with so-called backreferences (backslash, group number) which are replaced with what was matched by the groups. Groups are counted the same ...