Erika Sawajiri questions

• Can anyone explain this subtraction and summation in python? [duplicate]
• How to check all the elements in a list that has a specific requirement?
• What is the difference between syntax error and runtime error?
• Can anyone explain why this sorting won't work?
• How to get every element in a list of list of lists?
• How to write and save html file in python?

Erika Sawajiri answers