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Pandas groupby: How to get a union of strings
... {a}
4 {random}
dtype: object
Doing this on a whole frame, one group at a time. Key is to return a Series
def f(x):
return Series(dict(A = x['A'].sum(),
B = x['B'].sum(),
C = "{%s}" % ', '.join(x['C'])))
In [14]: df.groupby('A'...
Combine Date and Time columns using python pandas
... columns were strings, or maybe it was just the answer that worked for the one that posted the question.
– toto_tico
Jan 24 '19 at 9:02
add a comment
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Avoid dropdown menu close on click inside
...e the most simplest solution to this problem. Thumbs up - just tested this one and it works!
– Torsten Barthel
Jan 7 '16 at 13:51
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How can you use optional parameters in C#?
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Surprised no one mentioned C# 4.0 optional parameters that work like this:
public void SomeMethod(int a, int b = 0)
{
//some code
}
Edit: I know that at the time the question was asked, C# 4.0 didn't exist. But this question still r...
How do I use jQuery's form.serialize but exclude empty fields
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I've been looking over the jQuery docs and I think we can do this in one line using selectors:
$("#myForm :input[value!='']").serialize() // does the job!
Obviously #myForm gets the element with id "myForm" but what was less obvious to me at first was that the space character is needed betw...
Best way to format integer as string with leading zeros? [duplicate]
...ormat this number with leading zeros until the hundreds place", integers alone cannot provide that - you need to use alternate data structures (string work well in this case)
– Gershom
Nov 11 '15 at 16:20
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Does reading an entire file leave the file handle open?
...ar attention to the actual file object. In your code, that object is mentioned only once, in an expression, and becomes inaccessible immediately after the read() call returns.
This means that the file object is garbage. The only remaining question is "When will the garbage collector collect the f...
Reverse of JSON.stringify?
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One example of this is that { bar:"bar" } (from your prototype) is not considered valid json since foo is a variable rather than a string. Valid json needs the key to be a string.
– Chase Florell
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python NameError: global name '__file__' is not defined
...file? There are 3 options for running the shell : CMD DEDICATED SHOW Would one of them do this?
– sinekonata
Jul 2 at 0:43
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How to Set Opacity (Alpha) for View in Android
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I'm amazed by everyone else's MUCH more complicated answers.
XML
You can very simply define the alpha in the color definition of the button (or any other view) in your xml:
android:color="#66FF0000" // Partially transparent red
In the a...