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Inverse dictionary lookup in Python
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python has a .index method on lists the returns the first found index with the specified value or an exception if not found... any reason why such a semantic could not be applied to dictionaries?
– Bria...
Split a string by spaces — preserving quoted substrings — in Python
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@MatthewG. The "fix" in Python 2.7.3 means that passing a unicode string to shlex.split() will trigger a UnicodeEncodeError exception.
– Rockallite
Nov 1 '19 at 3:06
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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...，因为tracepoints有稳定的应用程序编程接口。注意：现代linux系统(glibc >= 2.26)，open总是调用openat系统调用。
comm是内建变量，代表当前进程的名字。其它类似的变量还有pid和tid，分别表示进程标识和线程标识。
args是一个指针，...
In Python, how do I split a string and keep the separators?
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@Laurence: Well, it's documented: docs.python.org/library/re.html#re.split: "Split string by the occurrences of pattern. If capturing parentheses are used in pattern, then the text of all groups in the pattern are also returned as part of the resulting list."
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In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...guage and preclude a whole bunch of new features from being implemented in Python 2.x.
What yield from does is it establishes a transparent bidirectional connection between the caller and the sub-generator:
The connection is "transparent" in the sense that it will propagate everything correctly t...
SFTP in Python? (platform independent)
...s files to a hard-coded location with the password also hard-coded. I'm a python novice, but thanks to ftplib, it was easy:
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What is the Sign Off feature in Git for?
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Sign-off is a requirement for getting patches into the Linux kernel and a few other projects, but most projects don't actually use it.
It was introduced in the wake of the SCO lawsuit, (and other accusations of copyright infringement from SCO, most of which they never actually t...
Comprehensive beginner's virtualenv tutorial? [closed]
...tualenv's user guide, actually show you how to use the environment on your Python script. You aren't setting up an environment just for the sake of setting up an environment. I found one tutorial that at least shows you the alternative.
– Forage
Aug 8 '15 at 15...
How to re-raise an exception in nested try/except blocks?
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As of Python 3 the traceback is stored in the exception, so a simple raise e will do the (mostly) right thing:
try:
something()
except SomeError as e:
try:
plan_B()
except AlsoFailsError:
raise e # or r...
What is the best way to get all the divisors of a number?
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For those of us who don't understand Pythonese, what is this actually doing?
– Matthew Scharley
Oct 7 '08 at 13:24
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