-- import python modules
CREATE FUNCTION import_fail() returns text
    AS
'try:
	import foosocket
except ImportError:
	return "failed as expected"
return "succeeded, that wasn''t supposed to happen"'
    LANGUAGE plpython3u;
CREATE FUNCTION import_succeed() returns text
	AS
'try:
  import array
  import bisect
  import calendar
  import cmath
  import errno
  import math
  import operator
  import random
  import re
  import string
  import time
except Exception as ex:
	plpy.notice("import failed -- %s" % str(ex))
	return "failed, that wasn''t supposed to happen"
return "succeeded, as expected"'
    LANGUAGE plpython3u;
CREATE FUNCTION import_test_one(p text) RETURNS text
	AS
'try:
    import hashlib
    digest = hashlib.sha1(p.encode("ascii"))
except ImportError:
    import sha
    digest = sha.new(p)
return digest.hexdigest()'
	LANGUAGE plpython3u;
CREATE FUNCTION import_test_two(u users) RETURNS text
	AS
'plain = u["fname"] + u["lname"]
try:
    import hashlib
    digest = hashlib.sha1(plain.encode("ascii"))
except ImportError:
    import sha
    digest = sha.new(plain);
return "sha hash of " + plain + " is " + digest.hexdigest()'
	LANGUAGE plpython3u;
-- import python modules
--
SELECT import_fail();
    import_fail     
--------------------
 failed as expected
(1 row)

SELECT import_succeed();
     import_succeed     
------------------------
 succeeded, as expected
(1 row)

-- test import and simple argument handling
--
SELECT import_test_one('sha hash of this string');
             import_test_one              
------------------------------------------
 a04e23cb9b1a09cd1051a04a7c571aae0f90346c
(1 row)

-- test import and tuple argument handling
--
select import_test_two(users) from users where fname = 'willem';
                          import_test_two                          
-------------------------------------------------------------------
 sha hash of willemdoe is 3cde6b574953b0ca937b4d76ebc40d534d910759
(1 row)