Replace relative imports by absolute imports because pytest

Author: Matthias Koeppe

src/sage/functions/hypergeometric.py

@@ -166,6 +166,11 @@
 
 from sage.arith.misc import binomial, factorial, rising_factorial
 from sage.calculus.functional import derivative
+from sage.functions.error import erf
+from sage.functions.gamma import gamma
+from sage.functions.hyperbolic import cosh, sinh
+from sage.functions.log import exp, log
+from sage.functions.other import sqrt, real_part
 from sage.libs.mpmath import utils as mpmath_utils
 from sage.misc.latex import latex
 from sage.misc.misc_c import prod
@@ -179,12 +184,6 @@
 from sage.symbolic.function import BuiltinFunction
 from sage.symbolic.ring import SR
 
-from .error import erf
-from .gamma import gamma
-from .hyperbolic import cosh, sinh
-from .log import exp, log
-from .other import sqrt, real_part
-
 
 def rational_param_as_tuple(x):
     r"""