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What is the most efficient way to loop through dataframes with pandas? [duplicate]
...s of pandas now include a built-in function for iterating over rows.
for index, row in df.iterrows():
# do some logic here
Or, if you want it faster use itertuples()
But, unutbu's suggestion to use numpy functions to avoid iterating over rows will produce the fastest code.
...
Get ffmpeg information in friendly way
...file.asf would yield something like the following:
{
"streams": [{
"index": 0,
"codec_name": "wmv3",
"codec_long_name": "Windows Media Video 9",
"codec_type": "video",
"codec_time_base": "1/1000",
"codec_tag_string": "WMV3",
"codec_tag": "0x33564d57",
"width": 320,...
File Upload ASP.NET MVC 3.0
...ng an HTML form which would contain a file input:
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" value="OK" />
}
and then you would have a controller to handle the uplo...
Why use prefixes on member variables in C++ classes
... pointer (and pp for pointer to pointer)
v for volatile
s for static
i for indexes and iterators
e for events
Where I wish to make the type clear, I use standard suffixes (e.g. List, ComboBox, etc).
This makes the programmer aware of the usage of the variable whenever they see/use it. Arguably th...
file_put_contents(meta/services.json): failed to open stream: Permission denied
...
Suggestion from vsmoraes worked for me:
Laravel >= 5.4
php artisan cache:clear
chmod -R 777 storage/
composer dump-autoload
Laravel < 5.4
php artisan cache:clear
chmod -R 777 app/storage
composer dump-autoload
NOTE: DO NOT DO THIS ON ANY REMOTE SERVER (DEV OR PRODUCTIO...
How to add http:// if it doesn't exist in the URL?
...hat went on a swim and came back as a fish with the mindset to stop you at all costs from doing and things that might hurt you. There are so many people in the world, and you know, you have this incredible ideas and what you think is missing is motivation, But that is not true. because the way that ...
How do I calculate tables size in Oracle
...lls you how much space is allocated for each table taking into account the indexes and any LOBs on the table. Often you are interested to know "How much spaces the the Purchase Order table take, including any indexes" rather than just the table itself. You can always delve into the details. Note ...
Check whether a request is GET or POST [duplicate]
...
I've experienced environments where PHP doesn't actively set the $_POST global, so I agree that using the above method works much more reliably.
– Nathan Crause
Jul 5 '17 at 15:52
...
How to remove constraints from my MySQL table?
...rrect, because simply removing the foreign key will not remove the related index. Of course the index may have been created separately, but if it was created as a consequence of adding the foreign key in the first place, then it will not be removed simply by dropping the foreign key.
...
Numpy first occurrence of value greater than existing value
I have a 1D array in numpy and I want to find the position of the index where a value exceeds the value in numpy array.
7 A...