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Iterating over every two elements in a list
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You need a pairwise() (or grouped()) implementation.
For Python 2:
from itertools import izip
def pairwise(iterable):
"s -> (s0, s1), (s2, s3), (s4, s5), ..."
a = iter(iterable)
return izip(a, a)
for x, y in pairwise(l):
print "%d + %d = %d" % (x, y, x + y)
O...
How to get instance variables in Python?
Is there a built-in method in Python to get an array of all a class' instance variables? For example, if I have this code:
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How to break/exit from a each() function in JQuery? [duplicate]
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According to the documentation you can simply return false; to break:
$(xml).find("strengths").each(function() {
if (iWantToBreak)
return false;
});
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How to scale an Image in ImageView to keep the aspect ratio
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That's the same thing, just done in code rather than XML. setImageBitmap is the same as android:src="..." and setBackground... is android:background="..."
– Steve Haley
Mar 31 '10 at 10:55
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Python error “ImportError: No module named”
Python is installed in a local directory.
28 Answers
28
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importing pyspark in python shell
...If you don't bother about how it works!!!)
Use findspark
Go to your python shell
pip install findspark
import findspark
findspark.init()
import the necessary modules
from pyspark import SparkContext
from pyspark import SparkConf
Done!!!
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How to capture the “virtual keyboard show/hide” event in Android?
.... If this sounds complicated, it's not that really. Here's the code:
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
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String concatenation vs. string substitution in Python
In Python, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one?
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clang error: unknown argument: '-mno-fused-madd' (python package installation failure)
...ser (which will likely be the case if you are trying to append to /Library/Python/2.7/site-packages, the native Apple factory-installed Python distribution which ships with OS X, rather than to some other Python distribution which you have subsequently installed yourself), then you will need to do, ...
Where'd padding go, when setting background Drawable?
...ng the padding, which is on the contained RelativeLayout.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/commentCell"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@dra...