Search results for "python"
epub | | | Author:Machine Learning in Python

Our tree has an accuracy of 0.838 on the training set. But remember that this is not a good indicator. This is especially true for decision trees as this method ...
( Category: Machine Theory May 3,2019 )
epub |eng | 2019-03-29 | Author:Krish Naik

portfolio_returns=[] portfolio_volatilities=[] for x in range(1000): weights=np.random.random(num_assets) weights/=np.sum(weights) portfolio_returns.append(np.sum(weights*log_returns.mean())*250) portfolio_volatilities.append(np.sqrt(np.dot(weights.T,np.dot(log_returns.cov(),weights)))) portfolio_returns,portfolio_volatilities The output generated is shown in the following screenshot: In the loop, we are generating two weights, whose sums ...
( Category: Data Modeling & Design May 3,2019 )
epub |eng | 2016-09-17 | Author:Cody,Isaac D. [Cody,Isaac D.]

answer = 0 while (answer != 2): answer = int(input("What is 4 / 2? ")) print ("Correct!") So long as the specified condition evaluates to true, the “while” code block ...
( Category: Computers & Technology April 30,2019 )
epub, pdf |eng | | Author:Irv Kalb

import random MAX_GUESSES = 5 # maximum number of guesses allowed MAX_RANGE = 20 # highest possible number #Show introduction print 'Welcome to my Guess the Number program.' print 'Guess ...
( Category: Object-Oriented Design April 24,2019 )
epub |eng | 2009-06-28 | Author:Beazley, David M. [Beazley, David M.]

Message Handling Normally, messages are handled by the root logger. However, any Logger object can have special handlers added to it that receive and process log messages. This is done ...
( Category: Operating Systems April 21,2019 )
epub, mobi, pdf |eng | 2016-07-17 | Author:Kyran Dale

dataframe_to_mongo(df_winners_all, 'nobel_prize', 'winners_all') With our cleaned data in the database, we’re ready to start exploring it in the next chapter. Summary In this chapter, you learned how to clean a ...
( Category: Software Development April 18,2019 )
mobi |eng | 2019-03-24 | Author:MIttal, Narendra Mohan [MIttal, Narendra Mohan]

There are probably as many different hash algorithms as there are databases, all with the goal of producing a rather even distribution. Because even the most complex hash algorithm rarely ...
( Category: MySQL April 8,2019 )
epub |eng | 2018-11-29 | Author:Cody Jackson

Using SQL to query a database To query a table using SQL, you simply tell the database what it is you're trying to do. If you want to get a ...
( Category: Object-Oriented Design April 8,2019 )
epub, pdf |eng | 2014-08-25 | Author:Chad Adams [Adams, Chad]

Now, let's look at our new pyramid chart in the next screenshot. We can see quite a bit of data. Each horizontal line shows you the number of miles traveled ...
( Category: Programming Languages April 4,2019 )
epub, pdf |eng | | Author:Chandra, Rakesh Vidya; Varanasi, Bala Subrahmanyam

Creating an authentication Request If we remember the theme of the third chapter, we learned different kinds of authentication with requests, such as Basic authentication, Digest authentication, and OAuth authentication. ...
( Category: Software Development April 4,2019 )
epub, pdf |eng | 2016-11-29 | Author:Lott, Steven F. [Lott, Steven F.]

If needed, define the data structure normalization function. This almost always has to be a generator function. A structural change can't be applied via map() : from ch08_r02 import row_merge ...
( Category: Programming April 4,2019 )
mobi, epub |eng | | Author:A Rapid Guide to the Fundamental Features of Python

Wait. What just happened? How is this possible? As a hint, we'll need to search through the code for an object with a hidden, shared state. Earlier, we noted that ...
epub |eng | 2005-01-01 | Author:unknow

Discussion The string 'A unique mutex name' must be chosen to be unique to this script, and it must not be dynamically generated, because the string must have the same ...
( Category: other April 1,2019 )
epub |eng | 2009-06-29 | Author:Noah Gift & Jeremy M. Jones [Gift, Noah & Jones, Jeremy M.]

In order for our query to work in the first place, we needed to tell snmpd.conf about this script, and here is what that section looks like: syslocation "O'Reilly" syscontact ...
( Category: Computers & Technology April 1,2019 )
epub |eng | 2016-11-20 | Author:Barry, Paul [Barry, Paul]

Or, if you want to go with MariaDB, check out: https://mariadb.org/download/ Be sure to read the installation documentation associated with whichever version of the server your download and install. Don’t ...
( Category: Object-Oriented Design April 1,2019 )

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