Python Membership “in” Operator
Python “in” Operator – Checking Membership Example
Python “is not” Operator — Checking Object Difference
The Python is not operator — consisting of two keywords is and not — tests if the left and right operands refer to a different object—in which case it returns True. It returns False if they refer to the same object. For example, the expression [1, 2, 3] is not [1, 2, 3] returns True … Read more
Python is Operator — Checking Identity
The Python is keyword tests if the left and right operands refer to the same object—in which case it returns True. It returns False if they are not the same object, even if the two objects are equal. For example, the expression [1, 2, 3] is [1, 2, 3] returns False because although both lists … Read more
Python Version Anzeigen
Als Guido van Rossum im Jahr 1991 die erste nutzbare Python Version 0.9.0 veröffentlichte konnte er nicht erwarten, dass er im Begriff war eine der einflussreichsten Programmiersprachen in der Welt zu erschaffen. Python hat eine goldene Zukunft: jede neue Python Version erweitert die vohergehende mit neuen Fähigkeiten und Funktionen. Um deine Python version anzuzeigen, führe … Read more
Binance Trading API – Creating Your First Simple Crypto-Trading Bot
Disclaimer: The bot built here should be used only as a learning tool. If you choose to do real trading on Binance, then you have to build your own criteria and logic for trading. The author is not responsible for any losses incurred if you choose to use the code developed here on Binance. Note: … Read more
How to Get the Data Received in a Flask Request
Any web application frequently needs to process received from users. This data can be a query string, form data, and JSON objects (JavaScript Object Notation). Like any other web, the framework allows the user to access that requested data. This article will learn how to build a flask application with three routes to accept the … Read more
Understanding Generators In Python
If there is one subject in Python that creates confusion, it is that of generators. Generators are functions, but they have several differences from the ordinary functions you and I use daily. Today, we’ll be taking a gentle immersion into the world of generators to understand what they are, how they differ from ordinary functions, … Read more
How to Serialize a Python Dict into a String and Back?
Problem Formulation Given a Python dictionary containing lists and other data structures. You want to store the dictionary in a file or send it over the network in a more efficient form. How to serialize a Python dictionary into a string, and then deserialize the string back to a dictionary data structure? Here’s a rough … Read more
How to End a Function Def in Python?
Problem Formulation Given a function definition in Python, starting with the keyword def: How to know when a “def” of a function ends? For example, in Java and C++, functions are enclosed with opening and closing parentheses {…}, so the ending of a function is not ambiguous. Ending a Function Syntactically In Python, whitespace indentation … Read more
How to Rename Column Names in Pandas?
Problem Formulation Given a Pandas DataFrame with column labels, and a list of new column names as strings. How to change the column names to replace the original ones? Here’s an example using the following DataFrame: You want to rename the column names [‘Col_A’, ‘Col_B’, ‘Col_C’] to [‘a’, ‘b’, ‘c’] so that the resulting DataFrame … Read more
NumPy Boolean Indexing
You can index specific values from a NumPy array using another NumPy array of Boolean values on one axis to specify the indices you want to access. For example, to access the second and third values of array a = np.array([4, 6, 8]), you can use the expression a[np.array([False, True, True])] using the Boolean array … Read more
How to Find the Path of an Executable in Python?
Python’s shutil.which(cmd) function returns the path to the executable that would run if you called cmd in the command line. If there is no such executable, it returns None. The shutil module is part of the standard library, so you only need to add the statement “import shutil” to your program without needing to install … Read more