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Use numpy array in shared memory for multiprocessing
...ed child automatically shares the parent's memory space. In the context of Python multiprocessing, this means it shares all module-level variables; note that this does not hold for arguments that you explicitly pass to your child processes or to the functions you call on a multiprocessing.Pool or so...
Detect if a NumPy array contains at least one non-numeric value?
... Why doesn't something like float('nan') in x not work? I tried it and python returns False where x = [1,2,3,float('nan')].
– Charlie Parker
Oct 13 '16 at 22:02
1
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C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
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我正在用一个基于模板的库源代码，该库包含一些针对特定类型的模板函数特化。类模板，函数模板和模板函数特化都在头文件中。我在我的.cpp文件中 #include 头文件并编译链接工程。但是为了在整个工程中使用该库，我将...
How can I generate a unique ID in Python? [duplicate]
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You might want Python's UUID functions:
21.15. uuid — UUID objects according to RFC 4122
eg:
import uuid
print uuid.uuid4()
7d529dd4-548b-4258-aa8e-23e34dc8d43d
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Regex: match everything but specific pattern
...ny languages, use \A to define the unambiguous start of string, and \z (in Python, it is \Z, in JavaScript, $ is OK) to define the very end of the string.
Dot note: In many flavors (but not POSIX, TRE, TCL), . matches any char but a newline char. Make sure you use a corresponding DOTALL modifier (/s...
Why would one use REST instead of SOAP based services? [closed]
...and testable (harder to test SOAP with just a browser).
Don't need to use XML (well you kind of don't have to for SOAP either but it hardly makes sense since you're already doing parsing of the envelope).
Libraries have made SOAP (kind of) easy. But you are abstracting away a lot of redundancy un...
What's the fastest way to do a bulk insert into Postgres?
... is slower than using COPY but it is useful to me in work with psycopg and python (python list passed to cursor.execute becomes pg ARRAY):
INSERT INTO tablename (fieldname1, fieldname2, fieldname3)
VALUES (
UNNEST(ARRAY[1, 2, 3]),
UNNEST(ARRAY[100, 200, 300]),
UNNEST(ARRAY['a', 'b', '...
How to check if a file exists in Go?
...not have a function solely intended to check if a file exists or not (like Python's os.path.exists ). What is the idiomatic way to do it?
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What is a domain specific language? Anybody using it? And in what way?
...ser (mostly used for automated test), data storage and exchange languages (XML, YAML, ...), and document languages like LaTex, HTML or CSS.
Some languages with very flexible syntax like TCL and Lisp build their DSL directly into the language... when possible. The majority of languages use strings, ...
android fragment- How to save states of views in a fragment when another fragment is pushed on top o
...t this to work savedInstanceState was always null. I'm adding fragment via xml layout. Had to change the mCurCheckPosition to static then it works, but feels hacky.
– scottyab
Jul 10 '12 at 11:25
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