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How to count the number of true elements in a NumPy bool array
... count the number of elements whose values are True . Is there a NumPy or Python routine dedicated for this task? Or, do I need to iterate over the elements in my script?
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Simpler way to create dictionary of separate variables?
...e to be able to get the name of a variable as a string but I don't know if Python has that much introspection capabilities. Something like:
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python pip: force install ignoring dependencies
Is there any way to force install a pip python package ignoring all it's dependencies that cannot be satisfied?
2 Answers
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Cython: “fatal error: numpy/arrayobject.h: No such file or directory”
...eate a setup.py ... you don't need to even open a command line if you use IPython ... it's all very convenient. In your case, try running these commands in IPython or in a normal Python script:
import numpy
import pyximport
pyximport.install(setup_args={"script_args":["--compiler=mingw32"],
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Cross-platform way of getting temp directory in Python
... there a cross-platform way of getting the path to the temp directory in Python 2.6?
4 Answers
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Why were pandas merges in python faster than data.table merges in R in 2012?
I recently came across the pandas library for python, which according to this benchmark performs very fast in-memory merges. It's even faster than the data.table package in R (my language of choice for analysis).
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Visibility of global variables in imported modules
I've run into a bit of a wall importing modules in a Python script. I'll do my best to describe the error, why I run into it, and why I'm tying this particular approach to solve my problem (which I will describe in a second):
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np.mean() vs np.average() in Python NumPy?
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...</span>}, false);
*/
/*新增，使用document对象上滚动加载页面数据，这样可以兼容手机浏览器*/
<span style="white-space:pre"> </span>document.addEventListener('scroll', function() {
<span style="white-space:pre"> </span>self.update_page_idx();
<span style=...
How to pretty print XML from the command line?
...t;/foo><bar value="ipsum" /></root>' |
tidy -xml -i -
Python
Python's xml.dom.minidom can format XML (both python2 and python3):
echo '<root><foo a="b">lorem</foo><bar value="ipsum" /></root>' |
python -c 'import sys;import xml.dom.minidom;s=s...