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NumPy or Pandas: Keeping array type as integer while having a NaN value
...values. This enables vectorised NumPy-based calculations where, otherwise, Python-level loops would be processed.
The docs do suggest : "One possibility is to use dtype=object arrays instead." For example:
s = pd.Series([1, 2, 3, np.nan])
print(s.astype(object))
0 1
1 2
2 3
3 N...
How do I check in SQLite whether a table exists?
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This is a great way to determine if a table exists in Python.
– Michael Murphy
Dec 9 '14 at 7:01
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AWS S3: how do I see how much disk space is using
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On linux box that have python (with pip installer), grep and awk, install AWS CLI (command line tools for EC2, S3 and many other services)
sudo pip install awscli
then create a .awssecret file in your home folder with content as below (adjust ke...
Difference between map and collect in Ruby?
... is also a frequently used operation in high level languages such as Perl, Python and Ruby; the operation is called map in all three of these languages. A collect alias for map is also provided in Ruby (from Smalltalk) [emphasis mine]. Common Lisp provides a family of map-like functions; the one cor...
PHP UML Generator [closed]
...s),
has rock solid PHP import and export support (also supports C++, Java, Python)
is multiplatform (Linux, Windows, other OSes),
is full featured, impressively intensively developed (look at development history, it's hard to believe that such fast progress is possible).
supports plugins, has modula...
How to pick a new color for each plotted line within a figure in matplotlib?
...tplotlibrc file.
If you don't know where that file is, do the following in python:
import matplotlib
matplotlib.matplotlib_fname()
This will show you the path to your currently used matplotlibrc file.
In that file you will find amongst many other settings also the one for axes.color.cycle. Just p...
Debugging “Element is not clickable at point” error
...works well in the case where the element is wrapped in a div or a span. In Python I used .send_keys('\n') to simulate the click and work around the issue in Chrome.
– G-J
Feb 16 '16 at 18:07
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Can I add comments to a pip requirements file?
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Not the answer you're looking for? Browse other questions tagged python comments pip or ask your own question.
+ operator for array in PHP?
...ys would do. Other languages/libraries use + to concatenate lists (e.g. in Python) and "merge" functions to add the key/value pairs from one object onto another (e.g. in lodash). Yet in PHP it's the other way round; array_merge can be used for concatenating list-like arrays but + cannot. Unlike arra...
Convenient C++ struct initialisation
...the point of the question - how to achieve the same result in C++. I mean, Python does this with named arguments, C - with "named" fields, and C++ should have something too, I hope.
– dmitry_romanov
Jul 18 '13 at 6:00
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