In Python, None is a special keyword that represents the absence of a value. It is used to signify that a variable or object does not have a value assigned to it. In other words, it is a way to represent "nothing" or "null" in Python. Use of None When you create a variable ...
We can access individual items in a listbased on their positionby indexing the list: >>>colors=["purple","green","blue","yellow"]>>>colors[1]'green' Indexing uses square brackets at the end of the variable name thatpointsto our list. This is sometimes calledsubscript notation. ...
In this case, it opens a text file. It also has to return the descriptor of the resource, so it returns the opened file. The as file assigns the file to a variable file. Finally, the code you want to run with the acquired resource is placed in the with block after the colon. As...
The % operator is also used for string formatting in python. There may be situations when we need to insert a variable into a string. In such situations, we use the % operator inside the strings as a placeholder for variables or to specify the format of the variables in the string. Supp...
1. Using an “assert” Statement in Python? In Python programming, the “assert” statement stands as a flag for code correctness, a vigilant guardian against errors that may lurk within your scripts.”assert” is a Python keyword that evaluates a specified condition, ensuring that it holds tr...
Here are some steps you can follow to learn how to become a Python full-stack developer: 1. Learn the full-stack technologiesHere are some full-stack technologies you require proficiency in: Python fundamentalsStart by learning the fundamentals of Python by taking online courses and reading ...
Strings that contain ASCII letters (A to Z and a to z), digits, and underscores onlyThe reasoning behind this is that these objects are likely to be used in many programs. For example, most variable names in Python are covered by the second bullet point. By interning these objects, Pytho...
person fed a cat," the parser would look at the first rule, and work its way down all the rules checking to make sure they are correct. In this case, the first word is a <subject>, it follows the subject rule, and the parser will continue reading the sentence looking for a <verb...
What is if __name__ == "__main__"? By: Rajesh P.S.In Python, the __name__ attribute is a special built-in variable that holds the name of the current module or script. When the Python interpreter runs a script or module, it assigns the value __main__ to the __name__ ...
Strictly, the independent-samples t-test is redundant because it's equivalent to a one-way ANOVA. However, the independent variable holding only 2 distinct values greatly simplifies the calculations involved. This is why this test is treated separately from the more general ANOVA in most text ...