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Python Pandas: Get index of rows which column matches certain value
... pd.DataFrame({'BoolCol': [True, False, False, True, True]},
index=[10,20,30,40,50])
In [53]: df
Out[53]:
BoolCol
10 True
20 False
30 False
40 True
50 True
[5 rows x 1 columns]
In [54]: df.index[df['BoolCol']].tolist()
Out[54]: [10, 40, 50]
If you want to use the index...
Returning the product of a list
...as ne
# from functools import reduce # python3 compatibility
a = range(1, 101)
%timeit reduce(lambda x, y: x * y, a) # (1)
%timeit reduce(mul, a) # (2)
%timeit np.prod(a) # (3)
%timeit ne.evaluate("prod(a)") # (4)
In the following configuration:
a...
PHP cURL vs file_get_contents
...d that file_get_contents failed to work, where curl still would work.
Not 100%, but I believe that this php.ini setting may have been blocking the file_get_contents request.
; Disable allow_url_fopen for security reasons
allow_url_fopen = 0
Either way, our code now works with curl.
...
Position absolute and overflow hidden
...
totymedli
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answered Jan 5 '11 at 15:27
shankhanshankhan
...
What does the X-SourceFiles header do?
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
What is ?= in Makefile
...
SimonSimon
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1
...
How can I check if character in a string is a letter? (Python)
...
AMC
2,22966 gold badges1010 silver badges2828 bronze badges
answered Mar 21 '13 at 21:24
rainerrainer
...
How to update bower.json with installed packages?
...
I found this got problematic with just ~10 packages, as it's not obvious which packages were downloaded as dependencies of others, which caused bower to prompt for version numbers. Even with the correct answers, the resulting bower.json file was not quite right. I ...
JPQL IN clause: Java-Arrays (or Lists, Sets…)?
...
answered May 8 '10 at 10:25
Pascal ThiventPascal Thivent
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...
How do you format the day of the month to say “11th”, “21st” or “23rd” (ordinal indicator)?
...t;= 11 && n <= 13) {
return "th";
}
switch (n % 10) {
case 1: return "st";
case 2: return "nd";
case 3: return "rd";
default: return "th";
}
}
The table from @kaliatech is nice, but since the same information is repeated, it opens t...