python pandas series

In the previous article (1), I wrote an adorner and how to use it, but if you encounter a function with a return value, it is not good to make, so rewrite an adorner as follows:#basic2. Py#coding:utf-8def Auth (func): Def inner (*arg, **kwargs): print ' before ' temp = func (*arg,**kwarg s) #这行是关键, func equals fetch_server_list print ' after ' return temp #相当于返回fetch_server_list的值, and because the original function fetch_server_The value of the list is equivalent to returning the value of server

The list is very common in python and is very useful, so let's take a look at it today. First we need to remember two points: (1) The list is mutable (2) the list is suitable for all types of sequences, not just stringsNext we introduce the list of additions and deletions to change:(1) Increase in list: Add a single element Append method: This method is used to append a new object to the end of the list: >>> list=[1,2,3,4,

The color block outline positioning board and python Color Block of the python hop Series In the previous blog posts, we used color recognition, template matching, pixel traversal, and other methods to locate the chess pieces and board. For details, see my previous article, in this article, we will explore a new way to locate the board. Analysis After observation

Pixel traversal in the position of chess pieces in the python hop Series Preface In the previous blogs, we introduced and practiced color recognition, template matching, and other positioning methods of pawns, this blog will verify the pixel Traversal method used in the most popular jump plug-in on github. Method description The essence of pixel traversal is color recognition.In the method provided in githu

A conventional adorner, such as a @auth, performs 2 steps:1, execute auth function, and pass the parameter func come in2. Gets the return value and assigns the function name to the function of the adorner (e.g. let fetch_server_list equals the return value)Second, the parameter of the adorner, such as @auth (Before,after), then perform 3-step operation:1, execute auth (before,after) This function, get return value RET (assuming return value is ret)2, create the adorner, get the return value, sti

L Instantiate operations directly with = , such as p=people () L for attributes, preceded by two underscore __ indicates the property of the private L define the method with the DEF keyword, define the method in the class at least one parameter, if you use self as the argument, it must be the first argument, for self, with C + + or This is similar in Java , and when the method is called with an object, the first parameter of the object is passed to the self L built-in methods in a class N The co

Write a function remove_duplicates that takes the list as an argument and returns a new list that contains the unique elements in the source list. Elements that do not recur in the new list can take any order.Target=[]def remove_duplicates (list):For each in list:If each isn't in target:Target.append (each)return targetA collection is a collection of unique elements, without any particular sort. We can create a collection from a list like this:Country_ set = set (countries)Len (Country_set)196Ad

PyDev for Eclipse, you have to install the latter can be installed.PyDev Django Templates Editor: This requires Aptana Studio 3.Reference Documentation:eclipse-failed to load the JNI shared libraryIntroducing the IDE and other development tools common to Python programmersUsing Eclipse and Pydev to develop PythonInstall Python 3.1, Pydev 1.4.7 eclipse processI have a problem: is the source code of my

Drawing intuitively, it is essential to further select a time series analysis model, in order to show more clearly the regularity of the timing data (including the trend, the regularity of the change (one week, one months, one year, and so on) and the periodic pattern. The following is mainly based on the pandas library summarizes what common diagrams can be used for analysis. There are a total of the follo

ugly and does not consider paging when there is too much data.3 post-language To this, our Python series of course sharing complete, can be carefully aftertaste, this is starting from 0, step, virtually into the interface test framework of the course, of course, to here is just a beginning, the framework needs to be the knowledge point we are basically involved, and practice, practice by individuals, the f

Convert Timestamp to PeriodBy using the to_period method, the Series and DataFrame objects indexed by the timestamp can be converted to a time -indexedRng=pd.date_range (' 1/1/2000 ', periods=3,freq= ' M ')Ts=series (RANDN (3), index=rng)Print (TS)Pts2=ts.to_period (freq= ' M ')Print (PTS2)The results are as follows:TS is the date of the last day of each month,pts2 is the day of the month cycle2000-01-31 on

! One practice per day(1) Remove all preceding spaces in the string. Lstrip(2) Remove all the blanks behind the string. Rstrip(3) Remove the spaces on either side of the string. Strip>>> a = "ABC Test">>>>>>>>> Print A.rstrip ()ABC Test>>> Print A.lstrip ()ABC Test>>> Print A.strip ()ABC Test>>>String "ABCdef"(1) Please export it to uppercase(2) Please export it to lowercase>>> dir (str)>>> a = "abcdef">>> A.swapcase ()' ABCDEF '>>> A.lower ()' ABCdef '>>> The basics of the

Wheels in part 20th: Introduction to Twisted and ErlangIn this series, there is a fact that we have not introduced, that is, hybrid synchronous "plain python" code and Asynchronous twisted code is not a simple task, because blocking the indefinite time in the twisted program will lose the benefits of the asynchronous model.If you are in the first contact with asynchronous programming, then your knowledge se

This chapter mainly describes the concept of Python modules and the concept of packages, as well as their use, the harvest is also large.When you lift a python file, you often hear 3 nouns, python scripts, python modules, Python packages. The concept of scripting is referenc

Full Stack Engineer Development Manual (author: Shangpeng) Python Tutorial Full solution installation Pip Install LIGHTGBM Gitup Web site: Https://github.com/Microsoft/LightGBM Chinese Course http://lightgbm.apachecn.org/cn/latest/index.html LIGHTGBM Introduction The emergence of xgboost, let data migrant workers farewell to the traditional machine learning algorithms: RF, GBM, SVM, LASSO ... Now Microsoft has launched a new boosting framework that w

[Root @ ansheng ~] # Tree. /. /├ ── modules │ ├ ── _ init __. py │ ── lib01.py │ └ ── lib02.py ── scripts. py1 directory, 4 files [root @ ansheng ~] # Cat scripts. py #! /Usr/bin/env python # import the lib01 module under the modules package from modules import lib01 # import the lib02 module under the modules package from modules import lib02 [root @ ansheng ~] # Cat modules/_ init _. py #! /Usr/bin/env python