Recursive functionsIf the function contains a call to itself, the function is a recursive function!Let's start with the Fibonacci sequence: The Fibonacci sequence becomes the Golden section, showing the form 0, 1, 1, 2, 3, 5, 8, 13, 21, and
In a regular expression, group () is used to present a string that is intercepted by a packet , () to groupImport rea = "123abc456" Print Re.search ("([0-9]*) ([a-z]*] ([0-9]*)", a). Group (0) #123abc456, return to overall print re.search (" ([0-9]
Method 1: Use Help (Random)Import random>>> Help on module Random:name - random variable generators. file c:\python27\lib\random.py # files store locationMethod 2: Use random.__file__ to view the location, and then open the file with the
There is a need to automatically send mail in the business, there is no function to add attachments.At the same time, also solved the message in Chinese garbled situation.Directly on the code:Import SmtplibFrom Email.mime.text import MimetextdefMail_
A Python featuresOpen Source Freescripting language, parsing executionCross-platformHigh-level languages, object-oriented, extensible, and portable for use on different platforms (because Python is written in C , and because of the portability of
Common package management tools and relationshipsSetuptools-->distributeEasy_install-->pip1, distributeDistribute is an enhancement to the standard library Disutils module, and we know that disutils is primarily used to package and distribute
1. System version[[Email protected] ~] # cat/etc/issueCentOS release 6.4 (Final) Kernel \ r on an \m2. System default Python version[[Email protected] ~] # Python-vpython 2.6.6 3. Error message[[Email protected] ~]#YumThere is a problem importing
The regular can also match ... Geeksquiz Web site to provide code questions, can be used to self-test a language mastery situation, today to do Python's topic has an interesting discovery-the original can also write this >>>Sentence = ' Cats is fast
0. BackgroundThe underscore "_" in Python is much more frequent than other mainstream languages, and it has its own unique use in Python. This article focuses on: the use of underline in Python common sense.1. Single underline-encapsulates a name
Function:Create two sliders to control the size of the Gaussian kernel and
σ
The size of this program is changed on the threshold partition of the program. The threshold splitting program is in thisNote: because
σ=0
Python sequence 2-basic operation of string stringsStrings are a string of characters enclosed in single or double quotation marks, which is the most basic type of data. Its basic operations include: create assignment, access, change, delete . An
Logical regression (logistic regression)Logistic regression is a classical classification method in statistical learning. It is more used on the two classification {0,1} issue.Definition 1:Set X is a continuous random variable, and x obeys the
The previous article describes how to use the Distutils module to create a bundle, then after installing the module, how to delete it, the specific steps are as follows:[[email protected] ansible]# ls-l/usr/share/kel-rw-r--r--1 root root 9 09:23/usr/
1. Pylistobject Objecttypedef struct { Pyobject_var_head * *Ob_item; py_ssize_t allocated; } Pylistobject; # how to ask Hovertree.comThe obsize in Pyobject_var_head represents the number of elements that the list object
Python list and metadata group, python list
1. List
1.1 Basic operations on the list:
Index, slice, append, delete, length, slice, cycle, and contain>>> Name_list = ['Alex ', '65brother', 'tenglanc'] # initialize a list >>> type (name_list) #
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