pypi-install: command not found

Have You tried accessing the binary with the full path?

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

[root@server ~]# echo $PATH

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/pypi-install - from package: python-stdeb

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