Move core.config to _config.config (#25793)

Author: jbrockmendel

pandas/__init__.py

@@ -36,6 +36,9 @@
 
 from datetime import datetime
 
+from pandas._config import (get_option, set_option, reset_option,
+                            describe_option, option_context, options)
+
 # let init-time option registration happen
 import pandas.core.config_init
 

pandas/_config/__init__.py

@@ -2,3 +2,9 @@
 pandas._config is considered explicitly upstream of everything else in pandas,
 should have no intra-pandas dependencies.
 """
+__all__ = ["config", "get_option", "set_option", "reset_option",
+           "describe_option", "option_context", "options"]
+from pandas._config import config
+from pandas._config.config import (
+    describe_option, get_option, option_context, options, reset_option,
+    set_option)

pandas/core/config.py renamed to pandas/_config/config.py

@@ -695,7 +695,7 @@ def config_prefix(prefix):
 
     Example:
 
-    import pandas.core.config as cf
+    import pandas._config.config as cf
     with cf.config_prefix("display.font"):
         cf.register_option("color", "red")
         cf.register_option("size", " 5 pt")

pandas/_libs/tslibs/parsing.pyx

@@ -30,6 +30,8 @@ from dateutil.relativedelta import relativedelta
 from dateutil.parser import DEFAULTPARSER
 from dateutil.parser import parse as du_parse
 
+from pandas._config import get_option
+
 from pandas._libs.tslibs.ccalendar import MONTH_NUMBERS
 from pandas._libs.tslibs.nattype import nat_strings, NaT
 
@@ -51,20 +53,6 @@ cdef:
 
 # ----------------------------------------------------------------------
 
-_get_option = None
-
-
-def get_option(param):
-    """ Defer import of get_option to break an import cycle that caused
-    significant performance degradation in Period construction. See
-    GH#24118 for details
-    """
-    global _get_option
-    if _get_option is None:
-        from pandas.core.config import get_option
-        _get_option = get_option
-    return _get_option(param)
-
 
 def parse_datetime_string(date_string, freq=None, dayfirst=False,
                           yearfirst=False, **kwargs):

pandas/core/api.py

@@ -48,9 +48,6 @@
 from pandas.core.tools.datetimes import to_datetime
 from pandas.core.tools.timedeltas import to_timedelta
 
-from pandas.core.config import (get_option, set_option, reset_option,
-                                describe_option, option_context, options)
-
 
 # Deprecation: xref gh-16747
 class TimeGrouper(object):

pandas/core/arrays/categorical.py

@@ -5,6 +5,8 @@
 
 import numpy as np
 
+from pandas._config import get_option
+
 from pandas._libs import algos as libalgos, lib
 import pandas.compat as compat
 from pandas.compat import lzip
@@ -32,7 +34,6 @@
 from pandas.core.algorithms import factorize, take, take_1d, unique1d
 from pandas.core.base import NoNewAttributesMixin, PandasObject, _shared_docs
 import pandas.core.common as com
-from pandas.core.config import get_option
 from pandas.core.missing import interpolate_2d
 from pandas.core.sorting import nargsort
 

pandas/core/arrays/interval.py

@@ -3,6 +3,8 @@
 
 import numpy as np
 
+from pandas._config import get_option
+
 from pandas._libs.interval import (
     Interval, IntervalMixin, intervals_to_interval_bounds)
 from pandas.compat import add_metaclass
@@ -24,7 +26,6 @@
     ExtensionArray, _extension_array_shared_docs)
 from pandas.core.arrays.categorical import Categorical
 import pandas.core.common as com
-from pandas.core.config import get_option
 from pandas.core.indexes.base import Index, ensure_index
 
 _VALID_CLOSED = {'left', 'right', 'both', 'neither'}

pandas/core/base.py

@@ -66,7 +66,7 @@ def __bytes__(self):
         Invoked by bytes(obj) in py3 only.
         Yields a bytestring in both py2/py3.
         """
-        from pandas.core.config import get_option
+        from pandas._config import get_option
 
         encoding = get_option("display.encoding")
         return self.__unicode__().encode(encoding, 'replace')

pandas/core/computation/expressions.py

@@ -10,11 +10,12 @@
 
 import numpy as np
 
+from pandas._config import get_option
+
 from pandas.core.dtypes.generic import ABCDataFrame
 
 import pandas.core.common as com
 from pandas.core.computation.check import _NUMEXPR_INSTALLED
-from pandas.core.config import get_option
 
 if _NUMEXPR_INSTALLED:
     import numexpr as ne

pandas/core/config_init.py

@@ -9,8 +9,8 @@
 module is imported, register them here rather then in the module.
 
 """
-import pandas.core.config as cf
-from pandas.core.config import (
+import pandas._config.config as cf
+from pandas._config.config import (
     is_bool, is_callable, is_instance_factory, is_int, is_one_of_factory,
     is_text)