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Difference between filter and filter_by in SQLAlchemy
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filter_by uses keyword arguments, whereas filter allows pythonic filtering arguments like filter(User.name=="john")
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Difference between GeoJSON and TopoJSON
...rt TopoJSON to GeoJSON for use with standard tools such as d3.geoPath. (In Python, you can use topojson.py.) Also, TopoJSON’s integer format requires quantizing coordinates, which means that it can introduce rounding error if you’re not careful. (See the documentation for topojson -q.)
For serv...
How to set 'auto' for upper limit, but keep a fixed lower limit with matplotlib.pyplot
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Matplotlib plots: removing axis, legends and white spaces
I'm new to Python and Matplotlib, I would like to simply apply colormap to an image and write the resulting image, without using axes, labels, titles or anything usually automatically added by matplotlib. Here is what I did:
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Algorithm to find Largest prime factor of a number
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Here's the best algorithm I know of (in Python)
def prime_factors(n):
"""Returns all the prime factors of a positive integer"""
factors = []
d = 2
while n > 1:
while n % d == 0:
factors.append(d)
n /= d
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How to compare two floating point numbers in Bash?
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Why just python. You have perl installed by default on many Linux/Unix systems.. even php also
– anubhava
Jul 19 '17 at 15:44
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Avoiding instanceof in Java
... +1 I have used this approach when handling code generated from XML schemas, or messaging system, where there are dozens of object types, handed to my code in an essentially non-typesafe way.
– DNA
Oct 18 '12 at 19:46
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How to get the text node of an element?
...n the DOM
This issue will make you pay attention to the structure of your XML / HTML.
In this pure JavaScript example, I account for the possibility of multiple text nodes that could be interleaved with other kinds of nodes. However, initially, I do not pass judgment on whitespace, leaving that fi...
Maximum concurrent Socket.IO connections
...ser chat interface would be different to monitor users browser and so on.. Python i found very handy to script a simulator...
– Angry 84
Nov 27 '15 at 7:31
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Single vs Double quotes (' vs ")
...ften consists of many programming languages. HTML, JS, CSS, PHP, ASP, RoR, Python, ect. Because of this we have many syntax conventions for different programing languages. Often habbits from one language will follow us to other languages, even if it is not considered "proper" i.e. commenting convent...