CLN: remove factorize argument

Author: cpcloud

pandas/io/parsers.py

@@ -2,11 +2,10 @@
 Module contains tools for processing files into DataFrames or other objects
 """
 from __future__ import print_function
-from pandas.compat import range, lrange, StringIO, lzip, zip, string_types
+from pandas.compat import range, lrange, StringIO, lzip, zip, string_types, map
 from pandas import compat
 import re
 import csv
-from warnings import warn
 
 import numpy as np
 
@@ -266,7 +265,6 @@ def _read(filepath_or_buffer, kwds):
     'buffer_lines': None,
     'error_bad_lines': True,
     'warn_bad_lines': True,
-    'factorize': True,
     'dtype': None,
     'decimal': b'.'
 }
@@ -340,8 +338,7 @@ def parser_f(filepath_or_buffer,
                  encoding=None,
                  squeeze=False,
                  mangle_dupe_cols=True,
-                 tupleize_cols=False,
-                 factorize=True):
+                 tupleize_cols=False):
 
         # Alias sep -> delimiter.
         if delimiter is None:
@@ -400,8 +397,7 @@ def parser_f(filepath_or_buffer,
                     low_memory=low_memory,
                     buffer_lines=buffer_lines,
                     mangle_dupe_cols=mangle_dupe_cols,
-                    tupleize_cols=tupleize_cols,
-                    factorize=factorize)
+                    tupleize_cols=tupleize_cols)
 
         return _read(filepath_or_buffer, kwds)
 
@@ -680,7 +676,7 @@ def __init__(self, kwds):
                 is_sequence = isinstance(self.index_col, (list, tuple,
                                                           np.ndarray))
                 if not (is_sequence and
-                        all(com.is_integer(i) for i in self.index_col) or
+                        all(map(com.is_integer, self.index_col)) or
                         com.is_integer(self.index_col)):
                     raise ValueError("index_col must only contain row numbers "
                                      "when specifying a multi-index header")

pandas/parser.pyx

@@ -237,7 +237,7 @@ cdef class TextReader:
     cdef:
         parser_t *parser
         object file_handle, na_fvalues
-        bint factorize, na_filter, verbose, has_usecols, has_mi_columns
+        bint na_filter, verbose, has_usecols, has_mi_columns
         int parser_start
         list clocks
         char *c_encoding
@@ -276,7 +276,6 @@ cdef class TextReader:
 
                   converters=None,
 
-                  factorize=True,
                   as_recarray=False,
 
                   skipinitialspace=False,
@@ -338,8 +337,6 @@ cdef class TextReader:
                 raise ValueError('only length-1 separators excluded right now')
             self.parser.delimiter = ord(delimiter)
 
-        self.factorize = factorize
-
         #----------------------------------------
         # parser options