diff --git a/python/lammps.py b/python/lammps.py
index 4be2f48b0d..b74e111dc6 100644
--- a/python/lammps.py
+++ b/python/lammps.py
@@ -1115,7 +1115,7 @@ class lammps(object):
     The variable must be either an equal-style (or equivalent)
     variable or an atom-style variable. The variable type has to
     provided as ``vartype`` parameter which may be one of two constants:
-    ``LMP_VAR_EQUAL`` or ``LMP_VAR_STRING``; it defaults to
+    ``LMP_VAR_EQUAL`` or ``LMP_VAR_ATOM``; it defaults to
     equal-style variables.
     The group parameter is only used for atom-style variables and
     defaults to the group "all" if set to ``None``, which is the default.
diff --git a/unittest/python/python-commands.py b/unittest/python/python-commands.py
index 6bd5a2a247..4c80e8d227 100644
--- a/unittest/python/python-commands.py
+++ b/unittest/python/python-commands.py
@@ -1,6 +1,6 @@
 
 import sys,os,unittest
-from lammps import lammps
+from lammps import lammps, LMP_VAR_ATOM
 
 class PythonCommand(unittest.TestCase):
 
@@ -127,6 +127,155 @@ create_atoms 1 single &
 
         self.assertEqual(1, neighbors_i[0])
 
+    def test_extract_box_non_periodic(self):
+        self.lmp.command("boundary f f f")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+
+        boxlo, boxhi, xy, yz, xz, periodicity, box_change = self.lmp.extract_box()
+
+        self.assertEqual(boxlo, [0.0, 0.0, 0.0])
+        self.assertEqual(boxhi, [2.0, 2.0, 2.0])
+        self.assertEqual(xy, 0.0)
+        self.assertEqual(yz, 0.0)
+        self.assertEqual(xz, 0.0)
+        self.assertEqual(periodicity, [0, 0, 0])
+        self.assertEqual(box_change, 0)
+
+    def test_extract_box_periodic(self):
+        self.lmp.command("boundary p p p")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+
+        boxlo, boxhi, xy, yz, xz, periodicity, box_change = self.lmp.extract_box()
+
+        self.assertEqual(boxlo, [0.0, 0.0, 0.0])
+        self.assertEqual(boxhi, [2.0, 2.0, 2.0])
+        self.assertEqual(xy, 0.0)
+        self.assertEqual(yz, 0.0)
+        self.assertEqual(xz, 0.0)
+        self.assertEqual(periodicity, [1, 1, 1])
+        self.assertEqual(box_change, 0)
+
+    def test_extract_box_triclinic(self):
+        self.lmp.command("boundary p p p")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+        self.lmp.command("change_box all triclinic")
+        self.lmp.command("change_box all xy final 0.1 yz final 0.2 xz final 0.3")
+
+        boxlo, boxhi, xy, yz, xz, periodicity, box_change = self.lmp.extract_box()
+
+        self.assertEqual(boxlo, [0.0, 0.0, 0.0])
+        self.assertEqual(boxhi, [2.0, 2.0, 2.0])
+        self.assertEqual(xy, 0.1)
+        self.assertEqual(yz, 0.2)
+        self.assertEqual(xz, 0.3)
+        self.assertEqual(periodicity, [1, 1, 1])
+        self.assertEqual(box_change, 0)
+
+    def test_reset_box(self):
+        self.lmp.command("boundary p p p")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+        self.lmp.command("change_box all triclinic")
+        self.lmp.command("change_box all xy final 0.1 yz final 0.2 xz final 0.3")
+        self.lmp.reset_box([0,0,0], [1,1,1], 0, 0, 0)
+
+        boxlo, boxhi, xy, yz, xz, periodicity, box_change = self.lmp.extract_box()
+
+        self.assertEqual(boxlo, [0.0, 0.0, 0.0])
+        self.assertEqual(boxhi, [1.0, 1.0, 1.0])
+        self.assertEqual(xy, 0)
+        self.assertEqual(yz, 0)
+        self.assertEqual(xz, 0)
+        self.assertEqual(periodicity, [1, 1, 1])
+        self.assertEqual(box_change, 0)
+
+    def test_extract_variable_equalstyle(self):
+        self.lmp.command("variable a equal 100")
+        a = self.lmp.extract_variable("a")
+        self.assertEqual(a, 100)
+
+        self.lmp.command("variable a equal 3.14")
+        a = self.lmp.extract_variable("a")
+        self.assertEqual(a, 3.14)
+
+    def test_extract_variable_atomstyle(self):
+        self.lmp.command("units lj")
+        self.lmp.command("atom_style atomic")
+        self.lmp.command("atom_modify map array")
+        self.lmp.command("boundary f f f")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+
+        x = [
+          1.0, 1.0, 1.0,
+          1.0, 1.0, 1.5
+        ]
+
+        types = [1, 1]
+
+        self.assertEqual(self.lmp.create_atoms(2, id=None, type=types, x=x), 2)
+        self.lmp.command("variable a atom x*x+y*y+z*z")
+        a = self.lmp.extract_variable("a", "all", LMP_VAR_ATOM)
+        self.assertEqual(a[0], x[0]*x[0]+x[1]*x[1]+x[2]*x[2])
+        self.assertEqual(a[1], x[3]*x[3]+x[4]*x[4]+x[5]*x[5])
+
+    def test_get_thermo(self):
+        self.lmp.command("units lj")
+        self.lmp.command("atom_style atomic")
+        self.lmp.command("atom_modify map array")
+        self.lmp.command("boundary f f f")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+
+        x = [
+          1.0, 1.0, 1.0,
+          1.0, 1.0, 1.5
+        ]
+
+        types = [1, 1]
+        self.lmp.create_atoms(2, id=None, type=types, x=x)
+
+        state = {
+            "step": 0,
+            "elapsed" : 0.0,
+            "elaplong": 0,
+            "dt" : 0.005,
+            "time" : 0.0,
+            "atoms" : 2.0,
+            "temp" : 0,
+            "press" : 0,
+            "pe" : 0.0,
+            "ke" : 0.0,
+            "etotal" : 0.0,
+            "enthalpy" : 0.0,
+            "vol" : 8.0,
+            "lx" : 2.0,
+            "ly" : 2.0,
+            "lz" : 2.0,
+            "xlo" : 0,
+            "xhi" : 2.0,
+            "ylo" : 0,
+            "yhi" : 2.0,
+            "zlo" : 0,
+            "zhi" : 2.0
+        }
+
+        for key, value in state.items():
+            result = self.lmp.get_thermo(key)
+            self.assertEqual(value, result, key)
+
+    def test_extract_global_double(self):
+        self.lmp.command("region box block -1 1 -2 2 -3 3")
+        self.lmp.command("create_box 1 box")
+        self.assertEqual(self.lmp.extract_global("boxxlo"), -1.0)
+        self.assertEqual(self.lmp.extract_global("boxxhi"), 1.0)
+        self.assertEqual(self.lmp.extract_global("boxylo"), -2.0)
+        self.assertEqual(self.lmp.extract_global("boxyhi"), 2.0)
+        self.assertEqual(self.lmp.extract_global("boxzlo"), -3.0)
+        self.assertEqual(self.lmp.extract_global("boxzhi"), 3.0)
 
 ##############################
 if __name__ == "__main__":
diff --git a/unittest/python/python-numpy.py b/unittest/python/python-numpy.py
index 46794590f4..9f1d5f12c8 100644
--- a/unittest/python/python-numpy.py
+++ b/unittest/python/python-numpy.py
@@ -1,5 +1,7 @@
 import sys,os,unittest
-from lammps import lammps, LAMMPS_INT, LMP_STYLE_GLOBAL, LMP_STYLE_LOCAL, LMP_STYLE_ATOM, LMP_TYPE_VECTOR, LMP_TYPE_SCALAR, LMP_TYPE_ARRAY
+from lammps import lammps, LAMMPS_INT, LMP_STYLE_GLOBAL, LMP_STYLE_LOCAL, \
+                   LMP_STYLE_ATOM, LMP_TYPE_VECTOR, LMP_TYPE_SCALAR, LMP_TYPE_ARRAY, \
+                   LMP_VAR_ATOM
 from ctypes import c_void_p
 
 try:
@@ -178,5 +180,36 @@ class PythonNumpy(unittest.TestCase):
         self.assertIn(1, neighbors_i)
         self.assertNotIn(0, neighbors_j)
 
+    def test_extract_variable_equalstyle(self):
+        self.lmp.command("variable a equal 100")
+        a = self.lmp.numpy.extract_variable("a")
+        self.assertEqual(a, 100)
+
+        self.lmp.command("variable a equal 3.14")
+        a = self.lmp.numpy.extract_variable("a")
+        self.assertEqual(a, 3.14)
+
+    def test_extract_variable_atomstyle(self):
+        self.lmp.command("units lj")
+        self.lmp.command("atom_style atomic")
+        self.lmp.command("atom_modify map array")
+        self.lmp.command("boundary f f f")
+        self.lmp.command("region box block 0 2 0 2 0 2")
+        self.lmp.command("create_box 1 box")
+
+        x = [
+          1.0, 1.0, 1.0,
+          1.0, 1.0, 1.5
+        ]
+
+        types = [1, 1]
+
+        self.assertEqual(self.lmp.create_atoms(2, id=None, type=types, x=x), 2)
+        self.lmp.command("variable a atom x*x+y*y+z*z")
+        a = self.lmp.numpy.extract_variable("a", "all", LMP_VAR_ATOM)
+        self.assertIs(type(a), numpy.ndarray)
+        self.assertEqual(a[0], x[0]*x[0]+x[1]*x[1]+x[2]*x[2])
+        self.assertEqual(a[1], x[3]*x[3]+x[4]*x[4]+x[5]*x[5])
+
 if __name__ == "__main__":
     unittest.main()