How to write iterate over variable in Selenium?

Question

Python

I have the ability to write a query like:
for variable in range(1, 6):
block= driver.find_element_by_xpath("//*[@id='content']/form/table[4]/tbody/tr[' variable ']/td[2]/h3").text

And no matter how I try to write this variable, it displays only the first element. Everything else works correctly. How to properly declare a variable
in python3 ?