Initially generators were introduced to Python as an alternative way to write iterators. Recall that in Python an object that can be iterated over (as with aforloop) is called aniterable. An iterable implements the__iter__()special method that returns aniterator. An iterator, in turn, implem...
The NameError can be avoided easily by using the Python Error handling technique or exception handling, which denotes the user about the NameError that is occurring in the block of code without actually throwing an error. The most common errors that occur in Python are the SyntaxError & NameEr...
In this tutorial, you’ll learn various techniques to catch multiple exceptions with Python. To begin with, you’ll review Python’sexception handlingmechanism before diving deeper and learning how to identify what you’ve caught, sometimes ignore what you’ve caught, and even catch lots of exce...
TheList Index Out of Rangeerror often occurs when working with lists andforloops. You see, in Python, when you attempt to access an element using an index that lies outside the valid index range of the list, you're essentially telling the program to fetch something that isn't there, resu...
Error handling and exceptions Python provides tools for handling errors and exceptions in your code. Understanding how to use try/except blocks and raise exceptions is crucial for writing robust Python programs. We’ve got a dedicated guide onexception and error handling in Pythonwhich can help you...
How exec works in Python? Given below shows how exec works in Python with examples: a. Exec independent of global and local parameters Here there are no global or local parameters defined to restrict access for the program or functions. The program works within the scope available. ...
did. You’ll also import therender_template()helper function that lets you render HTML template files that exist in thetemplatesfolder you’re about to create. The file will have a single view function that will be responsible for handling requests to the main/route. Add the following conte...
In mylast Python Flask article, I walked you through the building of a simple application to take in a Threat Stack webhook and archive the alert to AWS S3. In this post, I'll dive into Python exception handling and how to do it in a secure manner. ...
A Python script or program is a file containing executable Python code. Being able to run Python scripts and code is probably the most important skill that you need as a Python developer. By running your code, you'll know if it works as planned.
How it worksWe will get into some details about Scrapy in later chapters, but let's just go through this code quick to get a feel how it is accomplishing this scrape. Everything in Scrapy revolves around creating a spider. Spiders crawl through pages on the Internet based upon rules that...