lsusb.py: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/lsusb.py - from package: usbutils

You may install the required package with command yum install {package}

Error in other languages:
lsusb.py: bevel nie gevind nie
lsusb.py: comandă negăsită
lsusb.py: comando não encontrado
lsusb.py: commande introuvable
lsusb.py: command not found
lsusb.py: käsku ei ole
lsusb.py: không tìm thấy lệnh
lsusb.py: komanda nerasta
lsusb.py: Kommando nicht gefunden.
lsusb.py: kommandot finns inte
lsusb.py: komut yok
lsusb.py: nie znaleziono polecenia
lsusb.py: níor aimsíodh an t-ordú
lsusb.py: no se encontró la orden
lsusb.py: no s'ha trobat l'ordre
lsusb.py: opdracht niet gevonden
lsusb.py: parancs nem található
lsusb.py: perintah tidak ditemukan
lsusb.py: príkaz nenájdený
lsusb.py: příkaz nenalezen
lsusb.py: команда не найдена
lsusb.py: командата не е открита
lsusb.py: 命令找不到
lsusb.py: コマンドが見つかりません