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filter items in a python dictionary where keys contain a specific string
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183
How about a dict comprehension:
filtered_dict = {k:v for k,v in d.iteritems() if filter_string ...
String concatenation in Ruby
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answered Dec 18 '08 at 13:09
KeltiaKeltia
13.8k33 gold badges2727 silver badges3030 bronze badges
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jQuery: How can i create a simple overlay?
...deas how to fix this?
– Vitaly
Oct 13 '10 at 9:39
9
Got it. Had to change doctype from <!DOCTY...
Creating a new column based on if-elif-else condition
...df['C'] = df.apply(f, axis=1)
In [2]: df
Out[2]:
A B C
a 2 2 0
b 3 1 1
c 1 3 -1
Of course, this is not vectorized so performance may not be as good when scaled to a large number of records. Still, I think it is much more readable. Especially coming from a SAS background.
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Set Colorbar Range in matplotlib
...p.arange(0, 10, .1)
X, Y = np.meshgrid(x,y)
data = 2*( np.sin(X) + np.sin(3*Y) )
def do_plot(n, f, title):
#plt.clf()
plt.subplot(1, 3, n)
plt.pcolor(X, Y, f(data), cmap=cm, vmin=-4, vmax=4)
plt.title(title)
plt.colorbar()
plt.figure()
do_plot(1, lambda x:x, "all")
do_plot(2, ...
Standard deviation of a list
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153
Since Python 3.4 / PEP450 there is a statistics module in the standard library, which has a meth...
Append column to pandas dataframe
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135
It seems in general you're just looking for a join:
> dat1 = pd.DataFrame({'dat1': [9,5]})
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Generate colors between red and green for a power meter?
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203
This should work - just linearly scale the red and green values. Assuming your max red/green/blu...
What's the difference between HEAD^ and HEAD~ in Git?
...t rev-parse documentation defines ~ as
<rev>~<n>, e.g. master~3
A suffix ~<n> to a revision parameter means the commit object that is the nth generation ancestor of the named commit object, following only the first parents. For example, <rev>~3 is equivalent to <rev>^^...
Number.sign() in javascript
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Ricardo Rocha
5,96355 gold badges4343 silver badges7676 bronze badges
answered Jan 31 '12 at 12:32
kbeckbec
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