Trouble on importing function from astropy library

[samsonite]

Completely defined, now!

Output:
[<Quantity 0.034465 arcsec>, <Quantity 0.483674 arcsec>]

# -------- tempo8.py ---------------
from astropy.time import Time
from astropy.utils import iers
t = Time('2007-04-05 12:00:0.0', format='iso', scale='utc', precision=6)
#
iers_b = iers.IERS_B.open()
print (iers_b.ut1_utc(t))
t.delta_ut1_utc = iers_b.ut1_utc(t)
print(t.delta_ut1_utc)
print(t.ut1.iso, t.ut1.mjd)
print(t.utc.iso, t.utc.mjd)
#
print (t.utc.iso, t.utc.mjd) 
print (t.utc.jd1, t.utc.jd2)
#
j1=float(t.utc.jd1)
j2=float(t.utc.jd2)
#
print (iers_b.pm_xy(j1,j2))    # appropriate command ... WOW!

#---------- OUTPUT ----------
# -0.07209225 s
# -0.07209225
# 2007-04-05 11:59:59.927908 54195.4999991656
# 2007-04-05 12:00:00.000000 54195.5
# 2007-04-05 12:00:00.000000 54195.5
# 2454196.0 0.0
# [<Quantity 0.034465 arcsec>, <Quantity 0.483674 arcsec>]
# -----------------------------