PrimerPy
Python | Algorithms | Data Science
Java Learning Path Java Learning Path
Learning JavaI’ve been thinking about learning Java and Spring Boot Framework as an alternative to Django/Flask. Ho
2020-05-08 Java
Java Learning Path
Count element frequencies Count element frequencies
How to count the frequencies of elements in a list? Convert to a dictionary with key is the element, value is the frequ
2020-04-19 Python
Python Data Structure
Sort Dictionary based on its values Sort Dictionary based on its values
How to sort a dictionary? It’s obvious to use the built-in sorted function, as it’s written in C and optimized already.
2020-04-19 Python
Python Data Structure
Named Tuple Named Tuple
For data with fixed format, they can be stored as tuples. Compared to dictionary, tuples save more space. However if we
2020-04-19 Python
Python Data Structure
Filter Data in List, Dictionary and Set Filter Data in List, Dictionary and Set
It’s a common operation to filter elements in list, dictionary and set. For loopdata = [-1, 2, 3, -4, 5]# filter out the
2020-04-19 Python
Python Data Structure
MRO: Understanding Multiple Inheritance in Python MRO: Understanding Multiple Inheritance in Python
While building a project in Django, it’s common to encounter multiple inheritance. For example, Django’s own ListView cl
2020-04-15 Python
Django Python MRO
Django Cookiecutter to create a project Django Cookiecutter to create a project
Cookiecutter is a cli tool creating projects from templates.Cookiecutter Django is a good starting point to structure an
2020-04-15 Python
Django Python Cookiecutter
Inheritance, yield, contextmanager and rollback Inheritance, yield, contextmanager and rollback
Building a webapp with flask could involve a couple of more advanced topics in Python, Flask and SQLAlchemy Event and Ro
2020-04-11 Python
Python ORM Flask
Flask Multi-threading Flask Multi-threading
Processes and threads are used to allocate computer resources in an optimal manner. Process A process is a unit for OS t
2020-04-06 Python
Python Flask Threading
AppContext vs. RequestContext and Flask vs. Request AppContext vs. RequestContext and Flask vs. Request
In Flask, there are two types of context: AppContext, it’s a Flask object app = Flask(__name__) RequestContext, it’s
2020-04-06 Python
Python Web Framework Flask
Python Class Variables and Instance Variables Python Class Variables and Instance Variables
Understanding the difference between Class Var and Instance Var is fundamental to OOP. Class VarGiven a class Lang, as b
2020-04-05 Python
OOP Python Class
Flask: avoid circular import Flask: avoid circular import
One of the common mistakes using Flask is circular import.To avoid it, we can split one application file into three file
2020-04-01 Python
Python Web Framework Flask
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