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enum - getting value of enum on string conversion
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Shared-memory objects in multiprocessing
...es (even over a network).
The Manager approach can be used with arbitrary Python objects, but will be slower than the equivalent using shared memory because the objects need to be serialized/deserialized and sent between processes.
There are a wealth of parallel processing libraries and approaches...
SQLAlchemy IN clause
...rnative way is using raw SQL mode with SQLAlchemy, I use SQLAlchemy 0.9.8, python 2.7, MySQL 5.X, and MySQL-Python as connector, in this case, a tuple is needed. My code listed below:
id_list = [1, 2, 3, 4, 5] # in most case we have an integer list or set
s = text('SELECT id, content FROM myTable W...
How to prevent errno 32 broken pipe?
Currently I am using an app built in python. When I run it in personal computer, it works without problems.
4 Answers
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An efficient way to transpose a file in Bash
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A Python solution:
python -c "import sys; print('\n'.join(' '.join(c) for c in zip(*(l.split() for l in sys.stdin.readlines() if l.strip()))))" < input > output
The above is based on the following:
import sys
for c i...
Nginx缓存解决方案：SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的时候，通常SRCache和Memc模块一起搭配使用。网上能搜索到一些相关的例子，大家可以参考，这里就不赘述了。当问题比较复杂的时候，比如说缓存键的动态计算等，就不得不写一点代码了，此时Lua模块是最佳选择。
闲言碎语...
How do I perform the SQL Join equivalent in MongoDB?
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$unwind - because data is denormalised correctly, else wrapped in arrays
Python code..
db.LeftTable.aggregate([
# connect all tables
{"$lookup": {
"from": "RightTable",
"localField": "ID",
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How can I access Google Sheet spreadsheets only with Javascript?
...recipes" (JSON payloads) for core API requests
If you're not "allergic" to Python (if you are, just pretend it's pseudocode ;) ), I made several videos with more "real-world" samples of using the API you can learn from and migrate to JS if desired (NOTE: even though it's Python code, most API reques...
How do you log server errors on django sites
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Note that using logging.exception('Some message') with python's standard logging module works just fine in a sginal handler for got_request_exception, if all you are looking to do is log out stack traces. In other words, the traceback is still available in got_request_exception....
Java 8 Stream and operation on arrays
I have just discovered the new Java 8 stream capabilities. Coming from Python, I was wondering if there was now a neat way to do operations on arrays like summing, multiplying two arrays in a "one line pythonic" way ?
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