>>> from os import getenv
>>> import pymssql
>>> server = getenv(“КОМП”)
>>> user = getenv(“user”)
>>> password = getenv(“”)
>>> conn = pymssql.connect(server, user, password, “Test”)
    Traceback (most recent call last):
    File “<pyshell#6>”, line 1, in <module>
    conn = pymssql.connect(server, user, password, “Test”)
    File “pymssql.pyx”, line 635, in pymssql.connect (pymssql.c:10734)
    File “_mssql.pyx”, line 1902, in _mssql.connect (_mssql.c:21821)
    File “_mssql.pyx”, line 552, in _mssql.MSSQLConnection.__init__ (_mssql.c:5891)
    TypeError: argument of type ‘NoneType’ is not iterable