Installing Windows 7 on an iPad Pro
No, it is not possible to install Windows 7 on an iPad Pro. You'll need a desktop/laptop computer to run Windows.

Unlike generally available consumer computers, where you can choose to install supported operating system of your choice, it is not possible to change the operating system on your iPad (or iOS devices in general).

To install Windows, you'll need access to a PC computer. If you do not have access to a PC, Apple's desktop/laptop computers branded as Mac are capable of running Windows both natively or in a virtual machine.