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How can I check for NaN values?
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@charlie-parker : In Python3, math.isnan is still a part of the math module. docs.python.org/3/library/math.html#math.isnan . Use numpy.isnan if you wish, this answer is just a suggestion.
– gimel
Sep 8 '16 ...
How do I create a Python function with optional arguments?
I have a Python function which takes several arguments. Some of these arguments could be omitted in some scenarios.
2 Answe...
How to add a custom loglevel to Python's logging facility
...ally log(5, msg) isn't what I want. How can I add a custom loglevel to a Python logger?
16 Answers
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How to use timeit module
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If you want to use timeit in an interactive Python session, there are two convenient options:
Use the IPython shell. It features the convenient %timeit special function:
In [1]: def f(x):
...: return x*x
...:
In [2]: %timeit for x in range(100): f(x)
10...
Convert SVG to image (JPEG, PNG, etc.) in the browser
...$("#editor_save").click(function() {
// the canvg call that takes the svg xml and converts it to a canvas
canvg('canvas', $("#editor").html());
// the canvas calls to output a png
var canvas = document.getElementById("canvas");
var img = canvas.toDataURL("image/png");
// do what you want with the ...
How to compare type of an object in Python?
...ce(obj, (MyClass, type(None))) works. types.NoneType has been removed from Python 3 so it is not as portable as type(None) to get a reference to NoneType.
– Santeri Paavolainen
Feb 17 '16 at 13:17
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Iterating each character in a string using Python
...tring":
#do something with c
You can iterate pretty much anything in python using the for loop construct,
for example, open("file.txt") returns a file object (and opens the file), iterating over it iterates over lines in that file
with open(filename) as f:
for line in f:
# do so...
Python read-only property
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Generally, Python programs should be written with the assumption that all users are consenting adults, and thus are responsible for using things correctly themselves. However, in the rare instance where it just does not make sense for ...
Open-sided Android stroke?
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I achieved a good solution with this one:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- This is the line -->
<item android:top="-1dp" android:right="-1dp" android:left="-1dp"&g...
Convert base-2 binary number string to int
...y number:
>>> int('11111111', 2)
255
Here is documentation for python2, and for python3.
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