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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...-1]
df = df.iloc[ np.unique( df.index.values, return_index = True )[1] ]
Tests: 10k loops using OP's data
numpy method - 3.03 seconds
df.loc[~df.index.duplicated(keep='first')] - 4.43 seconds
df.groupby(df.index).first() - 21 seconds
reset_index() method - 29 seconds
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Setting transparent images background in IrfanView
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Based on my tests, this actually seems to be the easiest and most effective solution to saved icons missing transparency. Just make sure you click "options" like @Annalisa says, and not "Advanced"
– Eric Hepperle - ...
New lines inside paragraph in README.md
...o empty lines are a new paragraph (same as here in stackoverflow)
You can test it with http://prose.io
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Using sed, how do you print the first 'N' characters of a line?
... N+1 characters up to the end of line:
$ sed 's/.//5g' <<< "defn-test"
defn
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How do I redirect output to a variable in shell? [duplicate]
...te process forks. That another reason that I had to add parenthesis. echo "test" | (read ROLE_X; echo $ROLE_X ) Read more about this forking at stackoverflow.com/a/13764018/117471
– Bruno Bronosky
Apr 7 '15 at 21:10
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What are the differences between ipython and bpython?
...oad of a module after you have changed your code. This is very useful for testing and debugging.
Run functions in the background in a separate task with %bg.
A whole parallel programming environment (not really a feature you expect from an interactive Python shell, but IPython offers it).
This li...
How to do an update + join in PostgreSQL?
...ulatedvalue
from t
where id = t.rowid
This approach lets you develop and test your select query and in two steps convert it to the update query.
So in your case the result query will be:
with t as (
select v.id as rowid, s.price_per_vehicle as calculatedvalue
from vehicles_vehicle v
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How to change spinner text size and text color?
... work with android.support.v7.widget.AppCompatSpinner here is the simplest tested solution using styles:
<android.support.v7.widget.AppCompatSpinner
android:id="@+id/spefcialFx"
style="@style/Widget.AppCompat.Spinner.Underlined"
androi...
Using GSON to parse a JSON array
...rays.asList(..) is faster than creating a list using TypeRefence. I didn't test it with gson library but it may be worth to benchmark it.
– Pshemo
Oct 1 '18 at 20:59
add a com...
What is the difference between vmalloc and kmalloc?
...ory at boot.
*) This was true of earlier kernels. On recent kernels (I tested this on 2.6.33.2), max size of a single kmalloc is up to 4 MB! (I wrote a fairly detailed post on this.) — kaiwan
For a system call you don't need to pass GFP_ATOMIC to kmalloc(), you can use GFP_KERNEL. You're not...