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Is there a way to perform “if” in python's lambda
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The syntax you're looking for:
lambda x: True if x % 2 == 0 else False
But you can't use print or raise in a lambda.
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impr...
Convert string to a variable name
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assign is what you are looking for.
assign("x", 5)
x
[1] 5
but buyer beware.
See R FAQ 7.21
http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-turn-a-string-into-a-variable_003f
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Calculate the center point of multiple latitude/longitude coordinate pairs
...ion on SO asked about finding the average of a set of compass angles.
An expansion of the approach recommended there for spherical coordinates would be:
Convert each lat/long pair into a unit-length 3D vector.
Sum each of those vectors
Normalise the resulting vector
Convert back to spherical coor...
StringIO in Python3
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io.StringIO and it works, but I can't use it with numpy 's genfromtxt like this:
8 Answers
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Pythonic way to combine FOR loop and IF statement
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You can use generator expressions like this:
gen = (x for x in xyz if x not in a)
for x in gen:
print x
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Inline labels in Matplotlib
In Matplotlib, it's not too tough to make a legend ( example_legend() , below), but I think it's better style to put labels right on the curves being plotted (as in example_inline() , below). This can be very fiddly, because I have to specify coordinates by hand, and, if I re-format the plot, I pro...
How to manually create icns files using iconutil?
...nset
Since the path contains spaces, you need to use double quotes, for example:
iconutil -c icns "/Users/myname/SDK Mac Apps/MyApp/grafica/icon.iconset"
This command should work properly.
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How to detect if a function is called as constructor?
...nce.
Looking at the ECMAScript 3rd edition spec, the steps taken when new x() is called are essentially:
Create a new object
Assign its internal [[Prototype]] property to the prototype property of x
Call x as normal, passing it the new object as this
If the call to x returned an object, return it...
Sort points in clockwise order?
Given an array of x,y points, how do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather "solid", as convex as possible with no lines intersecting.
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Converting int to bytes in Python 3
...es on an iterable instead of a single integer:
>>> bytes([3])
b'\x03'
The docs state this, as well as the docstring for bytes:
>>> help(bytes)
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bytes(int) -> bytes object of size given by the parameter initialized with null bytes
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