REF/CLN: Move private method (#24875)

Author: mroeschke

pandas/core/computation/expr.py

@@ -18,7 +18,6 @@
  UndefinedVariableError, _arith_ops_syms, _bool_ops_syms, _cmp_ops_syms,
  _mathops, _reductions, _unary_ops_syms, is_term)
 from pandas.core.computation.scope import Scope
-from pandas.core.reshape.util import compose
 
 import pandas.io.formats.printing as printing
 
@@ -103,8 +102,19 @@ def _replace_locals(tok):
  return toknum, tokval
 
 
-def _preparse(source, f=compose(_replace_locals, _replace_booleans,
- _rewrite_assign)):
+def _compose2(f, g):
+ """Compose 2 callables"""
+ return lambda *args, **kwargs: f(g(*args, **kwargs))
+
+
+def _compose(*funcs):
+ """Compose 2 or more callables"""
+ assert len(funcs) > 1, 'At least 2 callables must be passed to compose'
+ return reduce(_compose2, funcs)
+
+
+def _preparse(source, f=_compose(_replace_locals, _replace_booleans,
+ _rewrite_assign)):
  """Compose a collection of tokenization functions
 
  Parameters
@@ -701,8 +711,8 @@ def visitor(x, y):
 class PandasExprVisitor(BaseExprVisitor):
 
  def __init__(self, env, engine, parser,
- preparser=partial(_preparse, f=compose(_replace_locals,
- _replace_booleans))):
+ preparser=partial(_preparse, f=_compose(_replace_locals,
+  _replace_booleans))):
  super(PandasExprVisitor, self).__init__(env, engine, parser, preparser)
 
 

pandas/core/reshape/util.py

@@ -1,7 +1,5 @@
 import numpy as np
 
-from pandas.compat import reduce
-
 from pandas.core.dtypes.common import is_list_like
 
 from pandas.core import common as com
@@ -57,14 +55,3 @@ def cartesian_product(X):
  return [np.tile(np.repeat(np.asarray(com.values_from_object(x)), b[i]),
  np.product(a[i]))
  for i, x in enumerate(X)]
-
-
-def _compose2(f, g):
- """Compose 2 callables"""
- return lambda *args, **kwargs: f(g(*args, **kwargs))
-
-
-def compose(*funcs):
- """Compose 2 or more callables"""
- assert len(funcs) > 1, 'At least 2 callables must be passed to compose'
- return reduce(_compose2, funcs)