How many students were on your list?

The question "What is the number of students on your list?" does not contain context, so the answer depends on the specific example or data.

If you assume you have a list of students in Python, for example:

students = ['Ivan', 'Maria', 'Petr', 'Anna']
print(len(students))  # Will output the number of students

In this example, the number of students is 4.

If the question pertains to a specific code or situation, it is necessary to clarify which list is being referred to.