The examples in this article describe the use of enumerate functions in Python. Share to everyone for your reference. The specific analysis is as follows:
A new function enumerate is found today. In general, when you want to traverse an index and traverse an element for a list or array, you write:
For I in range (0,len (list)): print I, List[i]
But this method is a bit cumbersome, using the built-in
Python Learning _ Data Processing Programming Example (i)Objective: To summarize the learning with statements, functions, List derivation, collection, sorting, character segmentation and other contents with an example.Requirements: respectively, the name of the James,julie,mikey,sarah four students to establish a text file, respectively, to store their own results, the time format is accurate for seconds, t
This example describes the use of enumerate functions in Python. Share to everyone for your reference. The specific analysis is as follows:
A new function enumerate was found today. This is typically done when a list or array is traversed by both the index and the element:
?
1 2
For I in range (0,len (list)): Print I, list[i]
But this method is somewhat cumbersome, and using the
Example Analysis of enumerate function usage in python, pythonenumerate
This example describes how to use the enumerate function in python. Share it with you for your reference. The specific analysis is as follows:
A new function enumerate was found today. In general, if you want to traverse both the index and elemen
Python AES encryption module Usage Analysis, pythonaes encryption module
This example describes the usage of the Python AES encryption module. We will share this with you for your reference. The details are as follows:
AES is a new encryption module. Last time I introduced how to use DES in OpenSSL in C language. This time, let's take a look at how the
Python built-in modules hashlib, hmac and uuid Usage Analysis, hashlibuuid
This example describes the usage of the Python built-in modules hashlib, hmac, and uuid. We will share this with you for your reference. The details are as follows:
I. hashlib
The md5 and sha algorithms generate a fixed-length message digest using the message digest algorithm. The message
Requirement Analysis:
The number of users of the province's oil and gas has already exceeded 6000, and the original static reports have become bloated,
It takes up to half a day to open each time, and even the browser crashes directly.
Build a simple web service using python to request a nick
The corresponding report data parameters are returned and transmitted in GET mode.
Research and Implementation:No r
Data analysis using Python--ipython one, ipython some common commands1.TAB Auto-complete2. Variable +? Show related information3. Function name +?? The code that can get the function4. Use the wildcard character * NP. load?5.%run + file name. PY can execute another script directly6._ and __ will save the last two output results7._ix and _x x line numbers will output the input and output of line XSecond, key
This example describes the Python pickle module usage. Share to everyone for your reference. The specific analysis is as follows:
The pickle provides a simple persistence feature. You can store the object as a file on disk.
Pickle.dump (obj, file[, Protocol])
Serializes the object and writes the resulting data stream to the file object. The parameter protocol is a serialization mode with a default value of
Read the Mongo in the text and make Chinese participleTake Top50 to generate word clouds for the result of Word segmentationCreate a word cloud effectIt seems that online about me is not the drug God vs Dallas debate is very hot ah. About the word frequency statistics on these, the code will also complete some other analysis tasks (in fact, are some very simple tasks, pure practiced hand), follow-up will co
Automatic slow query and Analysis Based on Python and automatic mail sendingConsists of two program files. The first program implements slow query analysis and file upload.
#! /Usr/local/python27/bin/python2.7from fabric. api import * from fabric. context_managers import * from fabric. contrib. console import confirmimport sysimport osimport timeimport datetimesd
This article mainly introduces the Python PYQT multithreaded serial Code analysis, small series feel very good, and now share to everyone, but also for everyone to do a reference. Let's take a look at it with a little knitting.
This blog main record a PYQT multithreaded serial port main code analysis, at the end of the text
The Basic course has not finished, it came to this, because my usual research is based on data processing. Who says the woman is inferior to the male 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0011.gif "alt=" J_0011.gif "/>do your own things well done carefully, Hee 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0003.gif "alt=" J_0003.gif "/>Read the introductory section, download the data used in the book: Https://github.com/wesm/pydata-bookIf you need to do the follow
Analysis of getattr (), setattr (), delattr (), hasattr (), and getattrsetattr in Python
Getattr () functionIs the core function of Python introspection. The usage is as follows:
Get object reference getattr
Getattr is used to return an object attribute or a method.
Class A: def _ init _ (self): self. name = 'hangjing' # self. age = ''def method (self): print "me
In this paper, the method of implementing the Markov chain algorithm in Python is described. Share to everyone for your reference. The specific analysis is as follows:
In the book "The Practice of Programming" (English name "The Practice of Programming"), the third chapter, respectively, uses the C language, C++,awk and Perl respectively to implement the horse-ear-chain algorithm to generate some useful
Compile a Python applet to calculate the keyword analysis of the test script
Generally, when the automated test project reaches a certain program, a lot of test code will naturally be written. If some basic functions and business functions need to be modified, it is necessary to find the places where the modified function has been referenced. Some ides support full-text
Tags: get open CTI count for close argv list src Because the database additions and deletions suddenly burst, need to query is the operation of those tables is particularly frequent, wrote a tool to analyze Bin-log, find and add to change the table, and the number of operations in descending order, the following is the code:
1 2 3 4 5 6 7 8 9 Ten One A - - the - - - + - + A at - - - - - in - to + - the * $
#for mysql5.5 binlog import os,sys #
Using Python for data analysis--numpy basics: Arrays and Vector computing
Ndarry, a multidimensional array with vector operations and complex broadcast capabilities for fast space-saving
Standard mathematical function for fast operation of whole set of data without For-loop
Tools for reading and writing disk data, and tools for manipulating memory-mapped files?
Linear algebra,
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