code-health: remove built-in types wrappers

The built-in `basestring` abstract type was removed in Python 3 [1].
`str` must be used for strings and `bytes` for byte objects. `long` type
was unified with `int` in Python 3 [2].

1. https://docs.python.org/3/whatsnew/3.0.html?highlight=basestring
2. https://peps.python.org/pep-0237/

Part of #212

tarantool/connection.py

@@ -85,7 +85,6 @@
     check_key,
     greeting_decode,
     version_id,
-    string_types,
     ENCODING_DEFAULT,
 )
 
@@ -640,7 +639,7 @@ def replace(self, space_name, values):
 
         :rtype: `Response` instance
         '''
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
         request = RequestReplace(self, space_name, values)
         return self._send_request(request)
@@ -697,7 +696,7 @@ class JoinState:
     def _ops_process(self, space, update_ops):
         new_ops = []
         for op in update_ops:
-            if isinstance(op[1], string_types):
+            if isinstance(op[1], str):
                 op = list(op)
                 op[1] = self.schema.get_field(space, op[1])['id']
             new_ops.append(op)
@@ -733,7 +732,7 @@ def insert(self, space_name, values):
 
         :rtype: `Response` instance
         '''
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
         request = RequestInsert(self, space_name, values)
         return self._send_request(request)
@@ -754,9 +753,9 @@ def delete(self, space_name, key, **kwargs):
         index_name = kwargs.get("index", 0)
 
         key = check_key(key)
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
-        if isinstance(index_name, string_types):
+        if isinstance(index_name, str):
             index_name = self.schema.get_index(space_name, index_name).iid
         request = RequestDelete(self, space_name, index_name, key)
         return self._send_request(request)
@@ -826,9 +825,9 @@ def upsert(self, space_name, tuple_value, op_list, **kwargs):
         '''
         index_name = kwargs.get("index", 0)
 
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
-        if isinstance(index_name, string_types):
+        if isinstance(index_name, str):
             index_name = self.schema.get_index(space_name, index_name).iid
         op_list = self._ops_process(space_name, op_list)
         request = RequestUpsert(self, space_name, index_name, tuple_value,
@@ -902,9 +901,9 @@ def update(self, space_name, key, op_list, **kwargs):
         index_name = kwargs.get("index", 0)
 
         key = check_key(key)
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
-        if isinstance(index_name, string_types):
+        if isinstance(index_name, str):
             index_name = self.schema.get_index(space_name, index_name).iid
         op_list = self._ops_process(space_name, op_list)
         request = RequestUpdate(self, space_name, index_name, key, op_list)
@@ -985,9 +984,9 @@ def select(self, space_name, key=None, **kwargs):
         # tuples)
         key = check_key(key, select=True)
 
-        if isinstance(space_name, string_types):
+        if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
-        if isinstance(index_name, string_types):
+        if isinstance(index_name, str):
             index_name = self.schema.get_index(space_name, index_name).iid
         request = RequestSelect(self, space_name, index_name, key, offset,
                                 limit, iterator_type)

tarantool/mesh_connection.py

@@ -33,11 +33,6 @@
     RequestCall
 )
 
-try:
-    string_types = basestring
-except NameError:
-    string_types = str
-
 default_addr_opts = {
     'transport': DEFAULT_TRANSPORT,
     'ssl_key_file': DEFAULT_SSL_KEY_FILE,
@@ -55,7 +50,7 @@ def parse_error(uri, msg):
 
     if not uri:
         return parse_error(uri, 'should not be None or empty string')
-    if not isinstance(uri, string_types):
+    if not isinstance(uri, str):
         return parse_error(uri, 'should be of a string type')
     if uri.count(':') != 1:
         return parse_error(uri, 'does not match host:port scheme')
@@ -117,7 +112,7 @@ def format_error(address, err):
         if 'host' not in result or result['host'] is None:
             return format_error(result,
                                 'host is mandatory for an inet result')
-        if not isinstance(result['host'], string_types):
+        if not isinstance(result['host'], str):
             return format_error(result,
                                 'host must be a string for an inet result')
 
@@ -131,7 +126,7 @@ def format_error(address, err):
 
         # Looks okay.
         return result, None
-    elif isinstance(result['port'], string_types):
+    elif isinstance(result['port'], str):
         # Looks like a unix address.
 
         # Expect no host.
@@ -140,7 +135,7 @@ def format_error(address, err):
                 result, 'host must be unset or None for a unix result')
 
         # Validate port.
-        if not isinstance(result['port'], string_types):
+        if not isinstance(result['port'], str):
             return format_error(result,
                                 'port must be a string for a unix result')
 

tarantool/request.py

@@ -56,7 +56,6 @@
 from tarantool.response import Response, ResponseExecute
 from tarantool.utils import (
     strxor,
-    binary_types
 )
 
 from tarantool.msgpack_ext.packer import default as packer_default
@@ -187,7 +186,7 @@ def sha1(values):
             sha = hashlib.sha1()
             for i in values:
                 if i is not None:
-                    if isinstance(i, binary_types):
+                    if isinstance(i, bytes):
                         sha.update(i)
                     else:
                         sha.update(i.encode())

tarantool/schema.py

@@ -5,10 +5,6 @@
 It is a Tarantool schema description.
 '''
 
-from tarantool.utils import (
-    string_types,
-    integer_types,
-)
 from tarantool.error import (
     Error,
     SchemaError,
@@ -151,7 +147,7 @@ def fetch_space(self, space):
             )
         elif len(space_row) == 0 or not len(space_row[0]):
             # We can't find space with this name or id
-            temp_name = 'name' if isinstance(space, string_types) else 'id'
+            temp_name = 'name' if isinstance(space, str) else 'id'
             errmsg = "There's no space with {1} '{0}'".format(space, temp_name)
             raise SchemaError(errmsg)
 
@@ -161,7 +157,7 @@ def fetch_space(self, space):
 
     def fetch_space_from(self, space):
         _index = None
-        if isinstance(space, string_types):
+        if isinstance(space, str):
             _index = const.INDEX_SPACE_NAME
         else:
             _index = const.INDEX_SPACE_PRIMARY
@@ -212,7 +208,7 @@ def fetch_index(self, space_object, index):
             )
         elif len(index_row) == 0 or not len(index_row[0]):
             # We can't find index with this name or id
-            temp_name = 'name' if isinstance(index, string_types) else 'id'
+            temp_name = 'name' if isinstance(index, str) else 'id'
             errmsg = ("There's no index with {2} '{0}'"
                       " in space '{1}'").format(index, space_object.name,
                                                 temp_name)
@@ -229,7 +225,7 @@ def fetch_index_all(self):
 
     def fetch_index_from(self, space, index):
         _index = None
-        if isinstance(index, string_types):
+        if isinstance(index, str):
             _index = const.INDEX_INDEX_NAME
         else:
             _index = const.INDEX_INDEX_PRIMARY
@@ -269,7 +265,7 @@ def get_field(self, space, field):
         try:
             return _space.format[field]
         except:
-            tp = 'name' if isinstance(field, string_types) else 'id'
+            tp = 'name' if isinstance(field, str) else 'id'
             errmsg = "There's no field with {2} '{0}' in space '{1}'".format(
                     field, _space.name, tp
             )

tarantool/utils.py

@@ -2,38 +2,14 @@
 import sys
 import uuid
 
-# Compatibility layer for Python2/Python3
-if sys.version_info.major == 2:
-    string_types     = (basestring, )
-    integer_types    = (int, long)
-    supported_types  = integer_types + string_types + (float,)
+supported_types = (int, str, bytes, float,)
 
-    ENCODING_DEFAULT = None
+ENCODING_DEFAULT = "utf-8"
 
-    if sys.version_info.minor < 6:
-        binary_types = (str, )
-    else:
-        binary_types = (bytes, )
-    from base64 import decodestring as base64_decode
+from base64 import decodebytes as base64_decode
 
-    def strxor(rhs, lhs):
-        return "".join(chr(ord(x) ^ ord(y)) for x, y in zip(rhs, lhs))
-
-elif sys.version_info.major == 3:
-    binary_types    = (bytes, )
-    string_types    = (str, )
-    integer_types   = (int, )
-    supported_types = integer_types + string_types + binary_types + (float,)
-
-    ENCODING_DEFAULT = "utf-8"
-
-    from base64 import decodebytes as base64_decode
-
-    def strxor(rhs, lhs):
-        return bytes([x ^ y for x, y in zip(rhs, lhs)])
-
-else:
-    pass # unreachable
+def strxor(rhs, lhs):
+    return bytes([x ^ y for x, y in zip(rhs, lhs)])
 
 def check_key(*args, **kwargs):
     if 'first' not in kwargs:

test/suites/test_dml.py

@@ -183,7 +183,7 @@ def test_07_call_16(self):
         ans = con.call('fiber.time64')
         self.assertEqual(len(ans), 1)
         self.assertEqual(len(ans[0]), 1)
-        self.assertIsInstance(ans[0][0], tarantool.utils.integer_types)
+        self.assertIsInstance(ans[0][0], int)
         ans = con.call('uuid.str')
         self.assertEqual(len(ans), 1)
         self.assertEqual(len(ans[0]), 1)
@@ -207,7 +207,7 @@ def test_07_call_17(self):
         self.assertIsInstance(ans[0], float)
         ans = con.call('fiber.time64')
         self.assertEqual(len(ans), 1)
-        self.assertIsInstance(ans[0], tarantool.utils.integer_types)
+        self.assertIsInstance(ans[0], int)
         ans = con.call('uuid.str')
         self.assertEqual(len(ans), 1)
         self.assertIsInstance(ans[0], str)