MAINT: remove never-needed callable and never-used compat functions

statsmodels/compat/python.py

@@ -20,7 +20,7 @@
     pickle = cPickle
     import urllib.request
     import urllib.parse
-    from urllib.request import HTTPError, urlretrieve, URLError
+    from urllib.request import HTTPError, URLError
     import io
     bytes = bytes
     str = str
@@ -45,14 +45,6 @@ def asstr2(s):  #added JP, not in numpy version
         else:
             return str(s)
 
-    def isfileobj(f):
-        return isinstance(f, io.FileIO)
-
-    def open_latin1(filename, mode='r'):
-        return open(filename, mode=mode, encoding='iso-8859-1')
-
-    strchar = 'U'
-
     # have to explicitly put builtins into the namespace
     range = range
     map = map
@@ -81,7 +73,6 @@ def lfilter(*args, **kwargs):
     urlretrieve = urllib.request.urlretrieve
     urlencode = urllib.parse.urlencode
     string_types = str
-    input = input
 
     ArgSpec= namedtuple('ArgSpec', ['args', 'varargs', 'keywords', 'defaults'])
     def getargspec(func):
@@ -129,19 +120,12 @@ def getargspec(func):
     asbytes = str
     asstr = str
     asstr2 = str
-    strchar = 'S'
-
-    def isfileobj(f):
-        return isinstance(f, file)
 
     def asunicode(s, encoding='ascii'):
         if isinstance(s, unicode):
             return s
         return s.decode(encoding)
 
-    def open_latin1(filename, mode='r'):
-        return open(filename, mode=mode)
-
     # import iterator versions of these functions
     range = xrange
     zip = itertools.izip
@@ -165,41 +149,14 @@ def open_latin1(filename, mode='r'):
     URLError = urllib2.URLError
     string_types = basestring
 
-    input = raw_input
-
-
-def getexception():
-    return sys.exc_info()[1]
-
-
-def asbytes_nested(x):
-    if hasattr(x, '__iter__') and not isinstance(x, (bytes, str)):
-        return [asbytes_nested(y) for y in x]
-    else:
-        return asbytes(x)
-
-
-def asunicode_nested(x):
-    if hasattr(x, '__iter__') and not isinstance(x, (bytes, str)):
-        return [asunicode_nested(y) for y in x]
-    else:
-        return asunicode(x)
-
 
 try:
-    advance_iterator = next
+    next = next
 except NameError:
-    def advance_iterator(it):
+    def next(it):
         return it.next()
-next = advance_iterator
 
 
-try:
-    callable = callable
-except NameError:
-    def callable(obj):
-        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
-
 def iteritems(obj, **kwargs):
     """replacement for six's iteritems for Python2/3 compat
        uses 'iteritems' if available and otherwise uses 'items'.

statsmodels/discrete/discrete_margins.py

@@ -1,6 +1,6 @@
 #Splitting out maringal effects to see if they can be generalized
 
-from statsmodels.compat.python import lzip, callable, range
+from statsmodels.compat.python import lzip, range
 import numpy as np
 from scipy.stats import norm
 from statsmodels.tools.decorators import cache_readonly, resettable_cache

statsmodels/robust/scale.py

@@ -8,7 +8,7 @@
 R Venables, B Ripley. 'Modern Applied Statistics in S'
     Springer, New York, 2002.
 """
-from statsmodels.compat.python import callable, range
+from statsmodels.compat.python import range
 import numpy as np
 from scipy.stats import norm as Gaussian
 from . import norms

statsmodels/sandbox/distributions/gof_new.py

@@ -18,7 +18,7 @@
 
 '''
 from __future__ import print_function
-from statsmodels.compat.python import range, lmap, string_types, callable
+from statsmodels.compat.python import range, lmap, string_types
 import numpy as np
 
 from scipy.stats import distributions

statsmodels/sandbox/formula.py

@@ -9,8 +9,8 @@
 
 """
 from collections import OrderedDict
-from statsmodels.compat.python import (iterkeys, lrange, callable, string_types,
-                                itervalues, range)
+from statsmodels.compat.python import (iterkeys, lrange, string_types,
+                                       itervalues, range)
 import copy
 import numpy as np
 

statsmodels/sandbox/nonparametric/kernels.py

@@ -18,7 +18,7 @@
 # pylint: disable-msg=W0142
 # pylint: disable-msg=E1101
 # pylint: disable-msg=E0611
-from statsmodels.compat.python import lzip, lfilter, callable, zip
+from statsmodels.compat.python import lzip, lfilter, zip
 import numpy as np
 import scipy.integrate
 from statsmodels.compat.scipy import factorial

statsmodels/tsa/base/datetools.py

@@ -2,7 +2,7 @@
 Tools for working with dates
 """
 from statsmodels.compat.python import (lrange, lzip, lmap,
-                                       asstr, reduce, zip, map)
+                                       asstr, zip, map)
 import re
 import datetime