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how to “reimport” module to python then code be changed after import
...port sys then reload(sys.modules['foo']) or perhaps reload(sys.modules[bar.__module__])
– drevicko
Oct 28 '13 at 1:02
3
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How exactly does the callstack work?
...ng of how the low level operations of programming languages work and especially how they interact with the OS/CPU. I've probably read every answer in every stack/heap related thread here on Stack Overflow, and they are all brilliant. But there is still one thing that I didn't fully understand yet.
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Pickle or json?
...ccf1b3fa91f4399902bb534/raw/03e8dbab11b5605bc572bc117c8ac34cfa959a70/pickle_vs_json.py
python pickle_vs_json.py
Results with python 2.7 on a decent 2015 Xeon processor:
Dir Entries Method Time Length
dump 10 JSON 0.017 1484510
load 10 JSON 0.375 -
dump 10 Pickle 0.011 ...
Parse query string into an array
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Technically PHP would also treat ?key=lorem&key=ipsum as if you only provided key=ipsum if that were the query string on the URL. And I think it's considered invalid to reuse the key and expect consistent results or that all ins...
How to rename with prefix/suffix?
...available and you have to rename more than one file, shell scripting can really be short and simple for this. For example, to rename all *.jpg to prefix_*.jpg in the current directory:
for filename in *.jpg; do mv "$filename" "prefix_$filename"; done;
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Retrieve list of tasks in a queue in Celery
... the queue.
You should look here:
Celery Guide - Inspecting Workers
Basically this:
from celery.app.control import Inspect
# Inspect all nodes.
i = Inspect()
# Show the items that have an ETA or are scheduled for later processing
i.scheduled()
# Show tasks that are currently active.
i.active()...
How do I write JSON data to a file?
... codecs.getwriter('utf-8')(f), ensure_ascii=False)
The codecs.getwriter call is redundant in Python 3 but required for Python 2
Readability and size:
The use of ensure_ascii=False gives better readability and smaller size:
>>> json.dumps({'price': '€10'})
'{"price": "\\u20ac10"}'
&...
Ruby, remove last N characters from a string?
...alternative, and hope it helps people who land here. In fact, I've covered all this in the question - I'm hoping this method accepts a regex soon, though there's a perfect alternative for your case right below this.
– SRack
Sep 2 '19 at 15:07
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C++ sorting and keeping track of indexes
... supply your original index vector, sort function, comparator, or automatically reorder v in the sort_indexes function using an extra vector.
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Most efficient way to create a zero filled JavaScript array?
... @PimpTrizkit arr = Array(n) and (arr = []).length = n behave identically according to the spec. In some implementations one could be faster, but I don't think there is a big difference.
– Oriol
Sep 22 '15 at 16:39
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