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Choosing NOSQL Database under what circumstances
KV Stores (Key Value): Like you do not have a fixed scheme and want to integrate new keys when required. For example you are building something and you need to integrate discount as a new key. Catching solutions are implemented using key value stores. Examples are reddis, memcached and DynamoDB. Quite fast and provide quick access. Most of the data is in memory. Request Response can also be stored in the key value.
Document based: When you are not sure about the scheme and how the fields evolve over time. They support heavy read and write. They have collections( like tables) and documents (like rows). The downside is that it does not provide the acid transactions.
Column DB: Midway of Relational and Document based. Fixed Schema but do not support ACID transactions. Used for heavy writes and special reads. Like event data i.e choosing database for music app. Example: Cassandra, HBase.
SearchDatabase: Like elastic search.
#acid #kv_store #column_db #document_based #kv_stores #nosql
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Choosing Relational Database under what circumstances
Properties of relational database
Schema
ACID
Schema: When your business has some specific schema and you have constraints for that scheme then go for relational database
ACID Property of Relational database
Atomicity: Means does not break . For example either the transaction should happen or not.
Consistent: Giving same value to x request. This does not mean that one request takes place in x time from the database and another request takes place in y time from the database.
Isolation: Different operations should not know each other. For example if read and write is happening to the database both operation should happen in isolation way.
Durability: Logs are ensured and stored in the persistent disks.
If you think that your business comes under ACID property go for Relational Database
Where Relational Database is not used
If the schema is not fixed
Application is going to scale
This does not mean that flexible schema and scaling is not supported by relational db but their performance decreases with these.
Check about blog on System Design from the below link
https://www.aisangam.com/blog/system-design-overview/
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1749. Maximum Absolute Sum of Any Subarray- Leetcode
This post is about how to solve the maximum absolute sum of any contiguous subarray taken from the array. Kadane algorithm is used to achieve that. We have made two videos on this talking about time and space complexity. Class based code is also implemented whose github link is also given for practice
https://www.youtube.com/watch?v=DEP-8UGCZa8
https://www.youtube.com/watch?v=kc3vb9F7sd4
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Convert PY to EXE | AI Sangam
Hello Friends, AI Sangam (Machine learning solutions and consulting) is back with new you tube video on converting .py file into .exe using cxFreeze. This video is also packed with Github link where both live code for using cxFreeze python to exe as well as well documented ReadMe.md file. Please have a look at both the links and please don’t forget to join us at different social media sites.
https://github.com/AISangam/create-.exe-file-from-.py-file
https://www.youtube.com/watch?v=vRWi7AdaxyY
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Installing and using virtual environment for python 2.7 and python 3.5
Hello friends, AI Sangam (Best Python Company) brings a simple but understandable document on installing virtual environment for python 2.7 and python 3.5. VIrtual environment helps you a lot while running different projects because your files in /usr/local/lib/python remains unaffected and packages are installed in the virtual environment only. Please spare some time to see this document
https://drive.google.com/file/d/1ZOZAw57XccOskV7tL7de6k0aLeuRhhrt/view?usp=sharing
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Simple and Easy understanding of Block Chain Technology | AI Sangam
Block Chain is such a technology which is used to transfer money from anywhere in the world to anywhere else without the need of bank very fast and within minutes with enhanced security. The magic part of block chain is that when the money is transferred from one place to another, data is saved in thousands of computers so if there comes faults in some computers, there is no need to worry as data will not be lost. If anyone wants to perform hacking he/she has to hacking for thousands of computer at a time which is very challenging and hence it is very difficult to hack it. It is possible to have the safest mode of transmission through block chain and hence it will be widely used in education, health care, finance sector and many other sectors in the coming time.
Talking about AI Sangam, it is data science solutions and consulting company with the vision to make the things secure and easy with the aid of artificial intelligence and programming skills. We over wide range of services in field of AI such as building intelligent chatbots, real time face detection, text based sentimental analysis and many more. We also deal with online lectures on Python, Docker, Django, Matlab. You can also visit http://finalbtechproject.com/ for it.
To view our products please visit http://www.aisangam.com/
To get in touch with latest trends in AI & Machine learning Stay tuned at
http://www.aisangam.com/blog/
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Uninstalling Lamp Completely from Ubuntu |AI Sangam
LAMP installs apache. MySQL, PHP. AI Sangam provides thesis guidance, AI related solutions with the vision for spreading education.
Uninstalling Lamp Completely from Ubuntu
sudo /opt/lampp/lampp stop………………………………1
sudo chmod +x /opt/lampp/uninstall………………………2
sudo /opt/lampp/uninstall…………………………………3.
sudo rm -rf /opt/lamp………………………………………4
Explanation of Each Line
Line 1: Sudo is used to provide the admin privileges. Lampp is installed in opt directory and stop lamp service by executing this command
Line 2: There is uninstall file in lampp directory which is made inside the opt directory. We need to provide this command to make it executable
Line 3: Just uninstall it by executing this command.
Line 4: Remove all the files in the lamp directory.
If you have any doubt or any query please email us at [email protected]. You can also catch us at skype live:aisangamofficial
With regards
www.aisangam.com
#Companies developing artificial intelligence#Data Science Solutions and Consulting#Artificial intelligence service offerings#LAMP#UBUNTU#MYSQL#PHP#APACHE
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Error faced: |UnicodeDecodeError: 'utf-8' codec can't decode byte in position : invalid continuation byte|
A Unicode Decode Error is typically caused by not specifying the encoding of the file, and happens when you have a file with non-standard characters. For a quick fix, try opening the file in Sublime Text (or any software where resaving with UTF-8 is supported), and re-saving with encoding ‘UTF-8’.
Please free to contact us at [email protected] or you may also communicate us at skype live:aisangamofficial
With Regards
AI Sangam
www.aisangam.com
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Installing Ubuntu On Virtual Box on Window 7| AI Sangam
Virtual box plays an important role when you want to test different operating system on host system. This video is about installing ubuntu on virtual box on window 7. For any queries or doubts please free to call us at skype live:aisangamofficial or contact us through Gmail at [email protected]. In video all steps are explained as well as other details are mentioned in the you tube description. AI Sangam is Data science solution and consulting company which aims in providing the best service in programming and web integration. Please spare some time to see the video https://www.youtube.com/watch?v=Bo30KWM-MxY&t=1s
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How to install tensorflow on ubuntu using pip python
Tensorflow run on gpu with python is one of the most hot research these days. Deep learning implemented through python has made computer vision so successful that it made ai to next level. This video is about installing Tensorflow using pip python. It is high computational numerical analysis deep learning library. Please see the below video to see its installation.
https://www.youtube.com/watch?v=aFlz6ywh3IQ
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OCR | Extract Character’s in Blur Image using Python | AI Sangam
Optical character recognition is much useful and saves a lot of time but some challenges are encounters when the images are blurred. AI Sangam one of startup in computer vision and data science solution has published a video as well blog where blurred images are provided to model which extract the text from it.
Blog can be found here
http://www.aisangam.com/blog/ocr-extract-characters-in-blur-image-using-python-ai-sangam/
Video could be seen both in blog and also from below. AI Sangam thanks all for sparing some time in watching the video.
https://youtu.be/wqt2PkeKW-Q
#Data Science Solutions and Consulting#Companies developing artificial intelligence#Best python companies#Extract Character’s in Blur Image using Python#Blurred Images OCR
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AI Sangam Survey
Please spare some time to complete this survey forum. I bet this will help you to get good employment and knowledge of programming. Moreover, It takes just 2 minutes of you to complete this. Only 5 simple questions are there.
https://aisangam.typeform.com/to/ieWOIh
#Data Science Solutions and Consulting#Companies developing artificial intelligence#Artificial intelligence service providers India
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Python Lambda, Map, Filter and Reduce Operations with Python List
Python Lambda, Reduce, Filter and Map has very important significance especially while working with Python List. To explain every function both with live code an detailed description, Please see this video and click on the links provided in the description for viewing both the code and description of each function. Hope this would be useful to you especially for those who are appearing for python related programming interviews. Please click on the link to see the video
https://www.youtube.com/watch?v=R66CRZk8Vqw&feature=youtu.be
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Python Reduce Function Use Case
Python reduce is also very effective function while you need to apply some function to every element of the list or you want to do some comparison among different elements of the list . Please see the following code and description for finding the maximum element from the python list using reduce and lambda function.
https://github.com/AISangam/Python-Reduce
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Python filter lambda in Python List
Code and Read me file whose link AI Sangam is providing here provides you some insights about python filter and lambda function used with Python list. Please go through the read me file and jupyter notebook. Hope you will like and gain some goof knowledge. This code is to fetch the even and odd index values from the list using python filter and lambda function. Please find the link https://github.com/AISangam/Lambda-Function-and-Filter-in-Python
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Lambda or Anonymous function in Python
Lambda Function is also called Anonymous function and is used widely in python for shortening the code when you are dealing with solving mathematical equations and math function. AI Sangam has created a code to make you understand the concept with a demo code and detailed description to solve a harmonic mean equation using Lambda Function. Please follow the below link
https://github.com/AISangam/Anonymous-Function-in-Python
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