def dump(self, obj):
try:
return Pickler.dump(self, obj)
except RuntimeError as e:
if "recursion" in e.args[0]:
msg = ("Could not pickle object as excessively deep recursion "
"required.")
raise pickle.PicklingError(msg)
else:
raise
def _file_reduce(obj):
"""Save a file"""
import io
if not hasattr(obj, "name") or not hasattr(obj, "mode"):
raise pickle.PicklingError(
"Cannot pickle files that do not map to an actual file")
if obj is sys.stdout:
return getattr, (sys, "stdout")
if obj is sys.stderr:
return getattr, (sys, "stderr")
if obj is sys.stdin:
raise pickle.PicklingError("Cannot pickle standard input")
if obj.closed:
raise pickle.PicklingError("Cannot pickle closed files")
if hasattr(obj, "isatty") and obj.isatty():
raise pickle.PicklingError(
"Cannot pickle files that map to tty objects")
if "r" not in obj.mode and "+" not in obj.mode:
raise pickle.PicklingError(
"Cannot pickle files that are not opened for reading: %s" %
obj.mode)
name = obj.name
retval = io.StringIO()
try:
# Read the whole file
curloc = obj.tell()
obj.seek(0)
contents = obj.read()
obj.seek(curloc)
except IOError:
raise pickle.PicklingError(
"Cannot pickle file %s as it cannot be read" % name)
retval.write(contents)
retval.seek(curloc)
retval.name = name
return _file_reconstructor, (retval, )