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How to group dataframe rows into list in pandas groupby?
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You can do this using groupby to group on the column of interest and then apply list to every group:
In [1]: df = pd.DataFrame( {'a':['A','A','B','B','B','C'], 'b':[1,2,5,5,4,6]})
df
Out[1]:
a b
0 A 1
1 A 2
2 B 5
3 B 5
4 B 4
5 C 6
In [2]: df.groupby('a')['b'].apply(...
Cloning a private Github repo
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In some cases, if you are prompted for a password and then denied access, it may be because you need to provide a "personal access token" instead of your GitHub login password. [1] help.github.com/articles/which-remote-url-should-i-use [2] help.github.com/articles/…
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Efficiently convert rows to columns in sql server
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If you have an unknown number of columnnames that you want to transpose, then you can use dynamic SQL:
DECLARE @cols AS NVARCHAR(MAX),
@query AS NVARCHAR(MAX)
select @cols = STUFF((SELECT ',' + QUOTENAME(ColumnName)
from yourtable
group by ColumnName...
Importing a GitHub project into Eclipse
...jectname (in other words, you should have more than just the .git).
So then I try to import the project using the eclipse "import" option.
When I try to import selecting the option "Use the new projects wizard", the source code is not imported.
That is normal.
If I import selecting the o...
Difference between “@id/” and “@+id/” in Android
...depends on the context, when you're using the XML attribute of android:id, then you're specifying a new id, and are instructing the parser (or call it the builder) to create a new entry in R.java, thus you have to include a + sign.
While in the other case, like android:layout_below="@id/myTextView"...
How to printf “unsigned long” in C?
...ariable has an unpredictable value that gets passed to printf which printf then interprets as unsigned. I'm guessing bodacydo's original problem was flow reaching an incorrect printf call instead of the one intended...
– R.. GitHub STOP HELPING ICE
Jul 9 '10 at...
How to move a file?
...stination is on a different disk than the source, it will instead copy and then delete the source file.
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Python serialization - Why pickle?
...at would store the pickled version of our var dict in the 'filename' file. Then, in another script, you could load from this file into a variable and the dictionary would be recreated:
with open('filename','rb') as f:
var = pickle.load(f)
Another use for pickling is if you need to transmit th...
Export a stash to another computer
...thout committing the changes yet) by simply running
git apply patchfile
Then you can simply create a new stash from the current working directory:
git stash
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How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
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