pgAdmin4 should work with python 3.7, Fixes #3458

docs/en_US/release_notes_3_2.rst

@@ -33,6 +33,7 @@ Bug fixes
 | `Bug #3446 <https://redmine.postgresql.org/issues/3446>`_ - Various procedure/function related fixes for EPAS/PG 11.
 | `Bug #3448 <https://redmine.postgresql.org/issues/3448>`_ - Exclude system columns in Import/Export.
 | `Bug #3457 <https://redmine.postgresql.org/issues/3457>`_ - Fix debugging of procedures in EPAS packages.
+| `Bug #3458 <https://redmine.postgresql.org/issues/3458>`_ - pgAdmin4 should work with python 3.7.
 | `Bug #3468 <https://redmine.postgresql.org/issues/3468>`_ - Support SSH tunneling with keys that don't have a passphrase.
 | `Bug #3471 <https://redmine.postgresql.org/issues/3471>`_ - Ensure the SSH tunnel port number is honoured.
 | `Bug #3526 <https://redmine.postgresql.org/issues/3526>`_ - COST statement should not be automatically duplicated after creating trigger function.

web/pgadmin/tools/sqleditor/__init__.py

@@ -1391,7 +1391,7 @@ def start_query_download_tool(trans_id):
                     did=trans_obj.did,
                     conn_id=conn_id,
                     auto_reconnect=False,
-                    async=False
+                    async_=False
                 )
 
                 sync_conn.connect(autocommit=False)

web/pgadmin/utils/driver/psycopg2/connection.py

@@ -149,7 +149,7 @@ class Connection(BaseConnection):
       - greater than or equal to 10.
     """
 
-    def __init__(self, manager, conn_id, db, auto_reconnect=True, async=0,
+    def __init__(self, manager, conn_id, db, auto_reconnect=True, async_=0,
                  use_binary_placeholder=False, array_to_string=False):
         assert (manager is not None)
         assert (conn_id is not None)
@@ -159,7 +159,7 @@ class Connection(BaseConnection):
         self.db = db if db is not None else manager.db
         self.conn = None
         self.auto_reconnect = auto_reconnect
-        self.async = async
+        self.async_ = async_
         self.__async_cursor = None
         self.__async_query_id = None
         self.__backend_pid = None
@@ -189,7 +189,7 @@ class Connection(BaseConnection):
         res = dict()
         res['conn_id'] = self.conn_id
         res['database'] = self.db
-        res['async'] = self.async
+        res['async_'] = self.async_
         res['wasConnected'] = self.wasConnected
         res['auto_reconnect'] = self.auto_reconnect
         res['use_binary_placeholder'] = self.use_binary_placeholder
@@ -202,7 +202,7 @@ class Connection(BaseConnection):
             self.conn_id, self.db,
             'Connected' if self.conn and not self.conn.closed else
             "Disconnected",
-            self.async
+            self.async_
         )
 
     def __str__(self):
@@ -210,7 +210,7 @@ class Connection(BaseConnection):
             self.conn_id, self.db,
             'Connected' if self.conn and not self.conn.closed else
             "Disconnected",
-            self.async
+            self.async_
         )
 
     def connect(self, **kwargs):
@@ -302,7 +302,7 @@ class Connection(BaseConnection):
                 database=database,
                 user=user,
                 password=password,
-                async=self.async,
+                async_=self.async_,
                 passfile=get_complete_file_path(passfile),
                 sslmode=manager.ssl_mode,
                 sslcert=get_complete_file_path(manager.sslcert),
@@ -316,7 +316,7 @@ class Connection(BaseConnection):
 
             # If connection is asynchronous then we will have to wait
             # until the connection is ready to use.
-            if self.async == 1:
+            if self.async_ == 1:
                 self._wait(pg_conn)
 
         except psycopg2.Error as e:
@@ -385,7 +385,7 @@ class Connection(BaseConnection):
 
         # autocommit flag does not work with asynchronous connections.
         # By default asynchronous connection runs in autocommit mode.
-        if self.async == 0:
+        if self.async_ == 0:
             if 'autocommit' in kwargs and kwargs['autocommit'] is False:
                 self.conn.autocommit = False
             else:
@@ -641,7 +641,7 @@ WHERE
         """
         This function executes the query using cursor's execute function,
         but in case of asynchronous connection we need to wait for the
-        transaction to be completed. If self.async is 1 then it is a
+        transaction to be completed. If self.async_ is 1 then it is a
         blocking call.
 
         Args:
@@ -658,7 +658,7 @@ WHERE
 
         params = self.escape_params_sqlascii(params)
         cur.execute(query, params)
-        if self.async == 1:
+        if self.async_ == 1:
             self._wait(cur.connection)
 
     def execute_on_server_as_csv(self,

web/pgadmin/utils/driver/psycopg2/cursor.py

@@ -208,6 +208,9 @@ class DictCursor(_cursor):
 
     def __iter__(self):
         it = _cursor.__iter__(self)
-        yield self._dict_tuple(next(it))
-        while 1:
+        try:
             yield self._dict_tuple(next(it))
+            while 1:
+                yield self._dict_tuple(next(it))
+        except StopIteration:
+            pass

web/pgadmin/utils/driver/psycopg2/server_manager.py

@@ -153,7 +153,7 @@ class ServerManager(object):
 
     def connection(
             self, database=None, conn_id=None, auto_reconnect=True, did=None,
-            async=None, use_binary_placeholder=False, array_to_string=False
+            async_=None, use_binary_placeholder=False, array_to_string=False
     ):
         if database is not None:
             if hasattr(str, 'decode') and \
@@ -206,12 +206,12 @@ WHERE db.oid = {0}""".format(did))
         if my_id in self.connections:
             return self.connections[my_id]
         else:
-            if async is None:
-                async = 1 if conn_id is not None else 0
+            if async_ is None:
+                async_ = 1 if conn_id is not None else 0
             else:
-                async = 1 if async is True else 0
+                async_ = 1 if async_ is True else 0
             self.connections[my_id] = Connection(
-                self, my_id, database, auto_reconnect, async,
+                self, my_id, database, auto_reconnect, async_,
                 use_binary_placeholder=use_binary_placeholder,
                 array_to_string=array_to_string
             )
@@ -256,7 +256,7 @@ WHERE db.oid = {0}""".format(did))
             conn_info = connections[conn_id]
             conn = self.connections[conn_info['conn_id']] = Connection(
                 self, conn_info['conn_id'], conn_info['database'],
-                conn_info['auto_reconnect'], conn_info['async'],
+                conn_info['auto_reconnect'], conn_info['async_'],
                 use_binary_placeholder=conn_info['use_binary_placeholder'],
                 array_to_string=conn_info['array_to_string']
             )

web/pgadmin/utils/sqlautocomplete/prioritization.py

@@ -4,13 +4,13 @@ from collections import defaultdict
 import sqlparse
 from sqlparse.tokens import Name
 
-white_space_regex = re.compile('\\s+', re.MULTILINE)
+white_space_regex = re.compile(r'\\s+', re.MULTILINE)
 
 
 def _compile_regex(keyword):
     # Surround the keyword with word boundaries and replace interior whitespace
     # with whitespace wildcards
-    pattern = '\\b' + re.sub(white_space_regex, '\\s+', keyword) + '\\b'
+    pattern = r'\\b' + re.sub(white_space_regex, r'\\s+', keyword) + r'\\b'
     return re.compile(pattern, re.MULTILINE | re.IGNORECASE)