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get list from pandas dataframe column
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Example conversion:
Numpy Array -> Panda Data Frame -> List from one Panda Column
Numpy Array
data = np.array([[10,20,30], [20,30,60], [30,60,90]])
Convert numpy array into Panda data frame
dataPd = pd.DataFrame(data = data)
print(dataPd)
0 1 2
0 10 20 30
1 20 30 60
2 ...
throwing exceptions out of a destructor
... fails... There is really no good way to protect against exceptions thrown from destructors, so the library makes no guarantees if an element destructor throws" (from Appendix E3.2) .
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Saving a Numpy array as an image
...An answer using PIL (just in case it's useful).
given a numpy array "A":
from PIL import Image
im = Image.fromarray(A)
im.save("your_file.jpeg")
you can replace "jpeg" with almost any format you want. More details about the formats here
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How do I write a correct micro-benchmark in Java?
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Tips about writing micro benchmarks from the creators of Java HotSpot:
Rule 0: Read a reputable paper on JVMs and micro-benchmarking. A good one is Brian Goetz, 2005. Do not expect too much from micro-benchmarks; they measure only a limited range of JVM perfor...
importing pyspark in python shell
...indspark
import findspark
findspark.init()
import the necessary modules
from pyspark import SparkContext
from pyspark import SparkConf
Done!!!
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How to drop into REPL (Read, Eval, Print, Loop) from Python code
...PL at an arbitrary point in its execution, even if the script was launched from the command line?
6 Answers
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Wireshark localhost traffic capture [closed]
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I haven't actually tried this, but this answer from the web sounds promising:
Wireshark can't actually capture local packets on windows XP due to
the nature of the windows TCP stack. When packets are sent and
received on the same machine they don't seem to cross t...
Correct way to populate an Array with a Range in Ruby
.... But this creates another array inside the array, I simply want the range from 2 to 25. Yet if I try order << (2.25) I get the error can't convert Range into Integer.
– kakubei
Nov 10 '11 at 14:29
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Python glob multiple filetypes
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from glob import glob
files = glob('*.gif')
files.extend(glob('*.png'))
files.extend(glob('*.jpg'))
print(files)
If you need to specify a path, loop over match patterns and keep the join inside the loop for simplicity:
f...
How many bytes in a JavaScript string?
I have a javascript string which is about 500K when being sent from the server in UTF-8. How can I tell its size in JavaScript?
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