for _ in range(10)

This is a for loop that will run 10 times. The underscore (_) is a placeholder for a variable that we don't need in this case. It's commonly used when we don't care about the value of the variable in the loop, but we still need to include it for syntax reasons.

Here's an example of how this for loop can be used:

for _ in range(10):
    print("Hello, world!")

This code will print the message "Hello, world!" ten times.