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How do I convert a pandas Series or index to a Numpy array? [duplicate]
... you should use the values attribute:
In [1]: df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['a', 'b', 'c']); df
A B
a 1 4
b 2 5
c 3 6
In [2]: df.index.values
Out[2]: array(['a', 'b', 'c'], dtype=object)
This accesses how the data is already stored, so there's no need for a...
What is the difference between `sorted(list)` vs `list.sort()`?
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329
sorted() returns a new sorted list, leaving the original list unaffected. list.sort() sorts the...
How can I find the number of arguments of a Python function?
...eters.
params = sig.parameters
print(params['kwarg1']) # prints: kwarg1=20
Additionally, you can call len on sig.parameters to also see the number of arguments this function requires:
print(len(params)) # 3
Each entry in the params mapping is actually a Parameter object that has further att...
How can I add the sqlite3 module to Python?
...stall sqlite3 module. It is included in the standard library (since Python 2.5).
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How to do a batch insert in MySQL
...nd separated by commas.
Example:
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
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How to take screenshot of a div with JavaScript?
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102
No, I don't know of a way to 'screenshot' an element, but what you could do, is draw the quiz re...
How to create a MySQL hierarchical recursive query
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424
For MySQL 8+: use the recursive with syntax.
For MySQL 5.x: use inline variables, path IDs, or ...
How to search by key=>value in a multidimensional array in PHP
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220
Code:
function search($array, $key, $value)
{
$results = array();
if (is_array($arra...
How to find Unused Amazon EC2 Security groups
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Note: this only considers security use in EC2, not other services like RDS. You'll need to do more work to include security groups used outside EC2. The good thing is you can't easily (might not even be possible) to delete active security groups if you miss one asso...