Introduction to Python Course

I would like to prevent a save in a django model when a certain constraint is not met and give a va… Read more Validate Count() Constraint In Many To Many Relation Before Saving An Instance In Django

I need to create a function that validates incoming json data and returns a python dict. It should … Read more Validate Json Data Using Python

What I want to do is to verify if a string is numeric -- a float -- but I haven't found a strin… Read more How Can I Verify If A String Is A Valid Float?

Python has str.isalnum(), str.isdigit(), str.isupper(), str.islower(), str.isalpha(), but does it h… Read more Does Python Have Built In String Validation For Special Characters And/or Punctuation?

I made a program where the user enters a number, and the program would count up to that number and … Read more Valueerror: Invalid Literal For Int() With Base 10 -- How To Guard Against Invalid User Input?

I'm using the schema library. How can I create a schema to validate if a dictionary contains an… Read more Python Schema To Have At Least One Key

I'm trying to do some Schematron validation with lxml. For the specific application I'm wor… Read more Schematron Validation With Lxml In Python: How To Retrieve Validation Errors?

I'm using the Pyparsing library to evaluate simple boolean queries like these ones: (True AND … Read more How To Validate Boolean Expression Syntax Using Pyparsing?