nlib | Annotated Algorithms in Python '' and the nlib.py library | Machine Learning library
kandi X-RAY | nlib Summary
kandi X-RAY | nlib Summary
The book builds a numerical library from the ground up, called nlib.py. It is a pure python library for numerical computations. It doesn't require numpy.
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- Fit a function to a given data
- Fit the least squares to a set of points
- Return the norm of a matrix
- Solve a newtonton function
- Encode the input into a Huffman node
- Join two sets
- Return the parent of the set
- Calculates Jacobi eigenvalues of matrix A
- Return the square root of x
- Test for scalar product
- Optimized golden search
- Simulate once
- Generate a list of n - sided walls
- Optimization of the secant function
- Folds the molecule
- R Cholesky decomposition
- Test the mergesort algorithm
- Simulates the simulation
- Return a random confidence interval
- Invert the bicgstab
- Solve a singleton problem using a Newton method
- Optimizes a singleton problem using the given function
- Test for scalar product test
- Markov ratio
- Apply a mapreduce function to data
- Simulate the model
nlib Key Features
nlib Examples and Code Snippets
Lines of Code : 14
License : No License
CopyIn [1]: from nlib import csvops
In [2]: df = csvops.ingest_csv("ext/input.csv")
2017-06-17 17:00:33,973 - nlib.csvops - INFO - CSV to DF conversion with CSV File Path ext/input.csv
In [3]: df.head()
Out[3]:
first_name last_name count
0 chu Community Discussions
Trending Discussions on nlib
QUESTION
Update
I have based my solution on this and this answers.
Background
I am trying to read a DER formatted certificate file and attempt to verify it.
My cert is in DER format. I have confirmed this by:
Using openssl command line:
openssl x509 -text -noout -inform DER -in Cert.cer: displays certificateopenssl x509 -text -noout -in Cert.cer: displaysunable to load certificateopenssl x509 -inform der -in Cert.cer -out Cert.pem: converts DER to PEM
I am using the below code to read:
...ANSWER
Answered 2019-Jan-17 at 14:35It looks like your problem is that you passed a data blob as a string.
BIO_puts (put string) copies up to the first zero-valued byte. Odds are this is somewhere in the middle of your certificate, which is why you're getting "not enough data" (a DER length value ends up being bigger than the length of the BIO data). (If your certificate had no zeros then it'll read too far and copy too much; be really careful calling functions that take pointers but not length).
BIO_write, on the other hand, writes the specified amount of data.
So instead of BIO_puts(bio_mem, readBytes.data()) you want BIO_write(bio_mem, readBytes.data(), readBytes.size()).
Technically, you should write to BIO_write in a loop, checking the return value (how many bytes it accepted for write), but the BIO_MEM always either critically fails or succeeds in one call.
(It turns out that BIO_MEM isn't a stream (a data segment with a position) but a pipe (a data segment with a read position and a write position), so it doesn't need to be rewound after writing to it.)
QUESTION
See code below:
...ANSWER
Answered 2018-Apr-03 at 11:10When you're iterating over the sys.argv[1:-1] list you're iterating one element at the time, not three as you might think, so it naturally complains that it cannot unpack ko (lo, pm...) into three variables - it would if you had the arguments themselves to be of length 3 (e.g. ko1 lo1 po1) but then it would unpack individual characters.
If you insist doing it this way, you can zip the values together into a tuple of three:
QUESTION
I am doing a simple example to send a SOAP request in Qt. The attempt is to use QNetwork resources and send a SOAP request to fetch cities in a country.
http://www.webservicex.net/globalweather.asmx?op=GetCitiesByCountry .
Please help; what is missing out. Thanks for any pointers/inputs.
Build machine - Linux Debian
Qt version - 5.7
SSL - 1.0.2 available.
...ANSWER
Answered 2017-Nov-06 at 07:17Calling manager.post(request, query.toUtf8()); will overwrite your request.setRawHeader("POST", "/globalweather.asmx HTTP/1.1");
If you would like to use your custom headers and so on, use sendCustomRequest
Or set the correct Uri in QNetworkRequest and use this request in QNetworkAccessManager::post method.
QUESTION
I am trying to get Qt 5.8 working with OpenSSL on Windows, but every time I get a step forward I hit another bigger object.
Edit/Update: This error occurs only in debug mode!
Here is my setup so far:
- Installed Qt 5.8
- Downloaded and compiled version of OpenSSL
- Transfer the small test project to MSVS2015
- Copied dll files (libeay32.dll and ssleay32.dll) to the application Directory
- SSL connection is now working fine
But here is the problem: Every time I had a connection open whether with SSL or not I get an error by quitting the application. Exception thrown at (ntdll.dll).
I tested my code with the Visual Leak Detector because I thought it was a Memory issue, but it does not solve my Problem. I rally have no clue where I should start anymore...
Here is a small example in Qt Creator 4.2.1 which doesn't work either
Here is my Code (it works fine with http, when I delete the OpenSSL dll's):
...ANSWER
Answered 2017-May-19 at 22:57This works for me. Just a local variable for request.
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Install nlib
You can use nlib like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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