couchpy: 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 Debian possible default full paths are:

/usr/bin/couchpy - from package: python-couchdb

You may install the required package with command apt-get install {package}

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