reinforcement learning python library

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Python Learning note 9: Time of the logo library

([00,59])%p:am or PM%s: seconds (range = [00,61], why not [00, 59], refer to Python manual ~_~)%u: Week in the Year of the Week of the year), Sunday as the first day of the week%w: Today in this week's days, the range is [0, 6],6 represents Sunday%W: Week of the Year (the Week of the year), Monday as the first day of the week%x: Date string (for example: 04/07/10)%x: Time string (for example: 10:43:39)%y:2 the year represented by a number%y:4 the yea

Python Learning Note 8: Regular expressions for the logo library

Python has a strong standard library. From now on, start learning some of the common features available in the standard library.First look at the regular expression (regular expressions), whose main function is to search for what you want to find by using a specific pattern (pattern) from a string.For example: To find all the numbers from a string, we can do this

Python Standard library-random Learning

Reference: Python 2.7.7 DocumentationReference tool: http://translate.google.cn/Random Module Learning First, bookkeeping functions (barely read)Random.seed ([x]) Initialize the basic random number generatorRandom.getstate () Return an object capturing the current internal state of the generatorRandom.setstate (state)Random.jumpahead (N)Random.getrandbits (k) Returns a

Python Learning Note 18: Standard library multi-process (multiprocessing package)

access the manager based on the address, after establishing the connection. Manipulate resources on the server.With the consent of the firewall, we are fully able to apply the manager to multiple computers. Thus imitating a real network situation.In the following example, our use of the manager is similar to shared memory. However, you can share a richer object type.Import multiprocessing def f (x, arr, L): x.value = 3.14 arr[0] = 5 l.append (' Hello ') server = multiprocessing. Manage

Python third-party library requests Learning

":"Https://developer.github.com/v3"Ten}Timeout settings 1 requests.get ( " http://github.com , Timeout=0.001) 2 3 ----------------------4 a bunch of exceptions, focus on the back 5 connecttimeout: Httpconnectionpool (Host= " github.com " Span style= "color: #800000;" > ' , port=80): Max retries exceeded with URL:/(Caused by connecttimeouterror ( connection to github.com timed out. (Connect timeout=0.001) ) accessing cookies1 Import Requests 2 r = requests.get ('http://www.google.com.hk

Python Learning note 17: Mathematical correlation of the standard library (math package, random package)

understand these distributions):Random.gauss (MU,SIGMA) # randomly generates random numbers that conform to the Gaussian distribution. The Mu,sigma is a Gaussian distribution of two parameters.Random.expovariate (LAMBD) # randomly generates random numbers that conform to the exponential distribution. LAMBD is an exponential distribution of the number of parameters.There are also logarithmic distributions, which are normally distributed. Pareto distribution. Weibull distributionIf we have a grou

Python Learning Note 12: Object serialization of the standard library

ObjectYou can use the Pickle.dumps () method to convert an object summer to a string picklestring (that is, a text stream).We can then store the string in the file (the input and output of the text file) using the normal text storage method.Import Pickleclass Bird (object): have_feather = True way_of_reproduction = ' egg ' summer = Bird () FileName = ' Save.pkl ' with open (FileName, ' W ') as f: # Open file with write-mode picklestring = Pickle.dump (Summer, F) # serialize and save O

Python Learning note 17: Mathematical correlation of the standard library (math package, random package)

conforms to the Gaussian distribution, and the Mu,sigma is two parameters of the Gaussian distribution.Random.expovariate (LAMBD) # randomly generates a random number that conforms to the exponential distribution, LAMBD is the parameter of the exponential distribution.There are also logarithmic distributions, normal distribution, Pareto distributions, Weibull distributions.Suppose we have a group of people in a dance competition, in order to be fair, we have to randomly arrange their appearance

Python Learning Note 12: Object serialization of the standard library (pickle package, Cpickle package)

(f) # Read file and build objectThe function and use of the Cpickle package of the two Cpickle package almost exactly the same as the pickle package, where the difference is actually very seldom used;The difference is that Cpickle is based on the C language, which is 1000 times times faster than the pickle package.For the example above, it is assumed that using the Cpickle package, we can change the import statement to:Import Cpickle as PickleThere is no need to make any changes.Python

Python Stringio standard library Basics Learning

#标准库: Stringio provides the class file API text buffer#作用: Can handle in-memory text, there are 2 different implementations: The CSTRINGIP version increases speed with C writing, Stringio provides portability with Python, and cstringio constructs large strings for better performance than other string connections#示例TryFrom Cstringio import StringioExceptFrom Stringio import Stringio#写入缓冲区Out=stringio ()Out.write (' buffer. ')Print >>out, ' and so this.

Python OS Library Learning notes

(PATH): Typically under Windows, return the drive name and path consisting of Ganso Os.path.splitunc (PATH): Splits the path into the load point and file Os.path.walk (path,visit,arg): Traverse path, enter each directory to call visit function, visit must have three parameters (Arg,dirname,names), dirname represents the directory name of the current directory, Names represents all file names in the current directory, and Args is the third parameter of walk Os.path.supports_unicode_filenam

Python Os.path Standard library Basics Learning 1

.#dirname () returns the first part of the path, if combined with basename () to get the original path#dirname (PATH)def path (P):P= (P)For I in P:print '%15s:%s '% (I,os.path.dirname (i))The #splitext () function is similar to split (), but it decomposes the path based on the extension delimiter instead of the directory delimiterdef path (P):P= (P)For I in P:print '%15s:%s '% (I,os.path.splitext (i))#查询扩展名时, only the last occurrence of os.extsep is used, and if a file name has multiple extensio

"Python" Scientific Computing Special _ Scientific Drawing Library matplotlib learning (bottom)

Basic reading of CSV file and drawing pie chartSince there is no prior experience of actual processing, this procedure is still worth seeing, involving the basic methods of working with tabular data:Import Matplotlib.pyplot as Pltimport pandas as pd# csv read file data = pd.read_csv (' outorder.csv ', encoding= ' gb2312 ') # Each column is compatible with the NumPy method A = data[' way '].values# gets the various possible contents of this column TypeName = []for i in a: if I is not in TypeNa

Python Re Library-----Learning (regular expression)

expression) Regex=re.compile (R ' (\bt\w+) \w+ (\w+) ') print ' Inputtext : ',textprint ' pattern : ', Regex.patternmatch=regex.search (text) print ' entirematch : ', Match.group (0) #表示整个表达式的字符串, sub-group sort print ' worldstartwith "T" starting from 1: ', Match.group (1) #匹配到的第一组print ' worldafter "T" NBSP;WORDNBSP;: ', Match.group (2) # The second group matched to the #python extended the basic grouping (? PContinue to study in .....This arti

Python numpy machine Learning Library Use example

Installation sudo yum install NumPy From numpy Import * Produces an array Random.rand (4,5) Result Array ([[0.79056842, 0.31659893, 0.34054779, 0.97328131, 0.32648329], [0.51585845, 0.70683055, 0.31476985, 0.07952725, 0.80907845], [0.81623517, 0.61038487, 0.66679161, 0.77412742, 0.03394483], [0.41758993, 0.54425978, 0.65350633, 0.90397197, 0.72706079]]) Produce a matrix >>> Randmat=mat (Random.rand (bis)) >>> randmat.i Matrix ([[[1.72265179, 0.82071484, 0.8218207,-3.20005387], [0.60602642,-1.28

Python Learning Notes (5) using the-time library

have a second argument, the current time is obtained by default.Strptime (Timestr, "%y-%m-%d%h:%m:%s") is converted to a struct based on the time string and the formatted output.>>> timestr'2018-01-26 12:55:33'time. Strptime (Timestr, "%y-%m-%d%h:%m:%s")time. Struct_time (tm_year=2018, tm_mon= 1, tm_mday=, tm_hour=,tm_min=, tm_sec=, tm_wday= 4, tm_yday=, tm_isdst=-1)Third, the timing of the programMeasurement time: Perf_counter () returns the exact time count value of a CPU level, which is goo

Python Crawler Selenium Library Learning

a contentTitle_contains Title contains a contentPresence_of_all_elements_located y element is loaded, passed in the locating tuple, as (by.id, ' P ')visibility_of element visible, incoming locator tupleText_to_be_present_in_element an element literal contains a literalText_to_be_present_in_element_value An element value contains a fileElement_to_be_clickable an element can be clickedWait a minute6 Browser forward and backwardBrowser.forward ()Browser.back ()7CookiesCookies can be viewed, added

Python Learning-turtle Library Exercises

# Coding=utf-8import turtle# Draw Pentagram def Drawstar (x): Turtle.begin_fill () for I in range (5): Turtle.forward (x ) Turtle.right (144) Turtle.end_fill () # transfer position def goTo (x, y): turtle.up () Turtle.goto (x, y) Turtle.down () Turtle.setup (864, 576) Turtle.bgcolor ("Red") Turtle.color ("Yellow") Turtle.fillcolor ("Yellow") Turtle.hideturtle () GoTo ( -380, X) Turtle.showturtle () Drawstar () for I in range (4): x = 1 If i in [0, 3]:

Python Learning-the standard library OS example (3)

#!/usr/bin/env Python3#-*-coding:utf-8-*-#lists the file size and creation date and file name of the current directory, equivalent to the ls-l command fromDatetimeImportdatetimeImportospwd= Os.path.abspath ('.')Print('Size last Modified Name')Print('------------------------------------------------------------') forFinchOs.listdir (PWD): F_size=os.path.getsize (f)ifF_size > 1024: K_size= Round (f_size/1024, 1) F_size= str (k_size) +'K' ifK_size > 1024: M_size= Round (k_size/1024, 1) F_size

[resource-] Python Web crawler & Text Processing & Scientific Computing & Machine learning & Data Mining weapon spectrum

Tasks and a variety of prede Fined environments to test and compare your algorithms. Pybrain is short for python-based reinforcement learning, Artificial Intelligence and neural Network Library. In fact, we came up with the name first and later reverse-engineered this quite descriptive "backronym". "Pybrain (

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