How can I know WiFi password in windows phone?

Why do you wanna hack password using Windows phone, most of the tools to crack wifi password written on the scripts that available on Linux. But yes, you can use python scripts on Windows machine, and for this purpose you need to install python on your machine. Wifi hacking requires you to map the wifi network and on the basis of the acquired information you decide to launch the attack.

The attacking methodology depends on the encryption used to protect the wifi network, for example WEP, WPA/WPA2 and may be WPS.