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What is a coroutine?
...etween two different routines without returning.
The 'yield' statement in Python is a good example. It creates a coroutine. When the 'yield ' is encountered the current state of the function is saved and control is returned to the calling function. The calling function can then transfer execution b...
Find element's index in pandas Series
... find an answer. How can I get the index of certain element of a Series in python pandas? (first occurrence would suffice)
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How to run cron job every 2 hours
... Enter into crontab :
crontab -e
write this into the file:
0 */2 * * * python/php/java yourfilepath
Example :0 */2 * * * python ec2-user/home/demo.py
and make sure you have keep one blank line after the last cron job in your crontab file
...
Remove leading and trailing spaces?
...ip([chars]): You can pass in optional characters to strip([chars]) method. Python will look for occurrences of these characters and trim the given string accordingly.
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How to access the last value in a vector?
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If you're looking for something as nice as Python's x[-1] notation, I think you're out of luck. The standard idiom is
x[length(x)]
but it's easy enough to write a function to do this:
last <- function(x) { return( x[length(x)] ) }
This missing feature in R...
How do I do word Stemming or Lemmatization?
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If you know Python, The Natural Language Toolkit (NLTK) has a very powerful lemmatizer that makes use of WordNet.
Note that if you are using this lemmatizer for the first time, you must download the corpus prior to using it. This can b...
“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
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For a simple HTML project:
cd project
python -m SimpleHTTPServer 8000
Then browse your file.
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Replace multiple strings with multiple other strings
...(result1)
// result1:
// men are dumb
// Extra: string insertion python style with an array of words and indexes
// usage
// arrayOfWords.reduce((f, s, i) => `${f}`.replace(`{${i}}`, s), sentence)
// where arrayOfWords has words you want to insert in sentence
// Example
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Requests — how to tell if you're getting a 404
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Not the answer you're looking for? Browse other questions tagged python python-requests or ask your own question.
Approximate cost to access various caches and main memory?
...~~ 2,500,000 ns - Read 10 MB sequentially from MEMORY~~(about an empty python process to copy on spawn)~~~~ x ( 1 + nProcesses ) on spawned process instantiation(s), yet an empty python interpreter is indeed not a real-world, production-grade use-case, is it?
10,000,000 ns - DISK seek
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