Added Tests and sympy_version clause

Author: ShikharJ

symengine/lib/symengine_wrapper.pyx

@@ -204,10 +204,6 @@ def sympy2symengine(a, raise_error=False):
         return atanh(a.args[0])
     elif isinstance(a, sympy.acoth):
         return acoth(a.args[0])
-    elif isinstance(a, sympy.acsch):
-        return acsch(a.args[0])
-    elif isinstance(a, sympy.asech):
-        return asech(a.args[0])
     elif isinstance(a, sympy.log):
         return log(a.args[0])
     elif isinstance(a, sympy.Abs):
@@ -232,6 +228,11 @@ def sympy2symengine(a, raise_error=False):
         return DenseMatrix(row, col, v)
     elif isinstance(a, sympy.polys.domains.modularinteger.ModularInteger):
         return PyNumber(a, sympy_module)
+    elif sympy.__version__ > '1.0':
+        if isinstance(a, sympy.acsch):
+            return acsch(a.args[0])
+        elif isinstance(a, sympy.asech):
+            return asech(a.args[0])
 
     if raise_error:
         raise SympifyError("sympy2symengine: Cannot convert '%r' to a symengine type." % a)

symengine/sympy_compat.py

@@ -279,8 +279,8 @@ def __new__(cls, a, b):
 
 '''
 for i in ("""Sin Cos Tan Gamma Cot Csc Sec ASin ACos ATan
-          ACot ACsc ASec Sinh Cosh Tanh Coth ASinh ACosh ATanh
-          ACoth""").split():
+          ACot ACsc ASec Sinh Cosh Tanh Coth Sech Csch ASinh ACosh ATanh
+          ACoth ASech ACsch""").split():
     print("""
 class %s(Function):
     _classes = (symengine.%s,)

symengine/tests/test_sympy_compat.py

@@ -1,5 +1,5 @@
 from symengine.sympy_compat import (Integer, Rational, S, Basic, Add, Mul,
-    Pow, symbols, Symbol, log, sin, zeros, atan2, Number)
+    Pow, symbols, Symbol, log, sin, sech, csch, zeros, atan2, Number)
 
 
 def test_Integer():
@@ -59,6 +59,23 @@ def test_sin():
     assert isinstance(i, sin)
 
 
+def test_sech():
+    x = symbols("x")
+    i = sech(0)
+    assert isinstance(i, Integer)
+    i = sech(x)
+    assert isinstance(i, sech)
+
+
+def test_csch():
+    x = symbols("x")
+    i = csch(x)
+    assert isinstance(i, csch)
+    i = csch(-1)
+    j = csch(1)
+    assert i == -j
+
+
 def test_log():
     x, y = symbols("x y")
     i = log(x, y)