Removed raise_from_traceback

pandas/compat/__init__.py

@@ -37,16 +37,6 @@ def set_function_name(f, name, cls):
     return f
 
 
-def raise_with_traceback(exc, traceback=Ellipsis):
-    """
-    Raise exception with existing traceback.
-    If traceback is not passed, uses sys.exc_info() to get traceback.
-    """
-    if traceback == Ellipsis:
-        _, _, traceback = sys.exc_info()
-    raise exc.with_traceback(traceback)
-
-
 # https://github.com/pandas-dev/pandas/pull/9123
 def is_platform_little_endian():
     """ am I little endian """

pandas/core/frame.py

@@ -34,7 +34,7 @@
 from pandas._config import get_option
 
 from pandas._libs import algos as libalgos, lib
-from pandas.compat import PY36, raise_with_traceback
+from pandas.compat import PY36
 from pandas.compat.numpy import function as nv
 from pandas.util._decorators import (
     Appender,
@@ -485,7 +485,7 @@ def __init__(
                     "DataFrame constructor called with "
                     "incompatible data and dtype: {e}".format(e=e)
                 )
-                raise_with_traceback(exc)
+                raise exc from e
 
             if arr.ndim == 0 and index is not None and columns is not None:
                 values = cast_scalar_to_array(
@@ -7816,11 +7816,10 @@ def f(x):
                 elif filter_type == "bool":
                     data = self._get_bool_data()
                 else:  # pragma: no cover
-                    e = NotImplementedError(
+                    raise NotImplementedError(
                         "Handling exception with filter_type {f} not"
                         "implemented.".format(f=filter_type)
-                    )
-                    raise_with_traceback(e)
+                    ) from e
                 with np.errstate(all="ignore"):
                     result = f(data.values)
                 labels = data._get_agg_axis(axis)

pandas/core/internals/construction.py

@@ -9,7 +9,7 @@
 
 from pandas._libs import lib
 import pandas.compat as compat
-from pandas.compat import PY36, raise_with_traceback
+from pandas.compat import PY36
 
 from pandas.core.dtypes.cast import (
     construct_1d_arraylike_from_scalar,
@@ -164,11 +164,10 @@ def init_ndarray(values, index, columns, dtype=None, copy=False):
             try:
                 values = values.astype(dtype)
             except Exception as orig:
-                e = ValueError(
+                raise ValueError(
                     "failed to cast to '{dtype}' (Exception "
                     "was: {orig})".format(dtype=dtype, orig=orig)
-                )
-                raise_with_traceback(e)
+                ) from orig
 
     index, columns = _get_axes(*values.shape, index=index, columns=columns)
     values = values.T

pandas/io/html.py

@@ -9,7 +9,6 @@
 import os
 import re
 
-from pandas.compat import raise_with_traceback
 from pandas.compat._optional import import_optional_dependency
 from pandas.errors import AbstractMethodError, EmptyDataError
 
@@ -889,7 +888,6 @@ def _parse(flavor, io, match, attrs, encoding, displayed_only, **kwargs):
     flavor = _validate_flavor(flavor)
     compiled_match = re.compile(match)  # you can pass a compiled regex here
 
-    # hack around python 3 deleting the exception variable
     retained = None
     for flav in flavor:
         parser = _parser_dispatch(flav)
@@ -916,7 +914,7 @@ def _parse(flavor, io, match, attrs, encoding, displayed_only, **kwargs):
         else:
             break
     else:
-        raise_with_traceback(retained)
+        raise retained
 
     ret = []
     for table in tables:

pandas/io/sql.py

@@ -12,7 +12,6 @@
 import numpy as np
 
 import pandas._libs.lib as lib
-from pandas.compat import raise_with_traceback
 
 from pandas.core.dtypes.common import is_datetime64tz_dtype, is_dict_like, is_list_like
 from pandas.core.dtypes.dtypes import DatetimeTZDtype
@@ -1596,17 +1595,17 @@ def execute(self, *args, **kwargs):
         except Exception as exc:
             try:
                 self.con.rollback()
-            except Exception:  # pragma: no cover
+            except Exception as inner_exc:  # pragma: no cover
                 ex = DatabaseError(
                     "Execution failed on sql: {sql}\n{exc}\nunable "
                     "to rollback".format(sql=args[0], exc=exc)
                 )
-                raise_with_traceback(ex)
+                raise ex from inner_exc
 
             ex = DatabaseError(
                 "Execution failed on sql '{sql}': {exc}".format(sql=args[0], exc=exc)
             )
-            raise_with_traceback(ex)
+            raise ex from exc
 
     @staticmethod
     def _query_iterator(

pandas/tests/util/test_util.py

@@ -4,7 +4,6 @@
 import pytest
 
 import pandas.compat as compat
-from pandas.compat import raise_with_traceback
 
 import pandas.util.testing as tm
 
@@ -34,23 +33,6 @@ def test_numpy_err_state_is_default():
     assert np.geterr() == expected
 
 
-def test_raise_with_traceback():
-    with pytest.raises(LookupError, match="error_text"):
-        try:
-            raise ValueError("THIS IS AN ERROR")
-        except ValueError:
-            e = LookupError("error_text")
-            raise_with_traceback(e)
-
-    with pytest.raises(LookupError, match="error_text"):
-        try:
-            raise ValueError("This is another error")
-        except ValueError:
-            e = LookupError("error_text")
-            _, _, traceback = sys.exc_info()
-            raise_with_traceback(e, traceback)
-
-
 def test_convert_rows_list_to_csv_str():
     rows_list = ["aaa", "bbb", "ccc"]
     ret = tm.convert_rows_list_to_csv_str(rows_list)

pandas/util/testing.py

@@ -23,7 +23,7 @@
 )
 
 import pandas._libs.testing as _testing
-from pandas.compat import _get_lzma_file, _import_lzma, raise_with_traceback
+from pandas.compat import _get_lzma_file, _import_lzma
 
 from pandas.core.dtypes.common import (
     is_bool,
@@ -2533,7 +2533,7 @@ def exception_matches(self, exc_type, exc_value, trace_back):
                         pat=self.regexp.pattern, val=val
                     )
                     e = AssertionError(msg)
-                    raise_with_traceback(e, trace_back)
+                    raise e.with_traceback(trace_back)
 
             return True
         else: