change eval default to False

Author: rforgione

pandas/computation/eval.py

@@ -148,7 +148,7 @@ def _check_for_locals(expr, stack_level, parser):
 
 def eval(expr, parser='pandas', engine=None, truediv=True,
          local_dict=None, global_dict=None, resolvers=(), level=0,
-         target=None, inplace=True):
+         target=None, inplace=False):
     """Evaluate a Python expression as a string using various backends.
 
     The following arithmetic operations are supported: ``+``, ``-``, ``*``,
@@ -207,7 +207,7 @@ def eval(expr, parser='pandas', engine=None, truediv=True,
         scope. Most users will **not** need to change this parameter.
     target : a target object for assignment, optional, default is None
         essentially this is a passed in resolver
-    inplace : bool, default True
+    inplace : bool, default False
         If expression mutates, whether to modify object inplace or return
         copy with mutation.