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How to connect fdb database using Python in Ubuntu?

I am trying to connect fdb database using python. I am remotely connected to ubuntu. I have tried this:
path = '/home/ubuntu/Firebird4.0/A.fdb'
con = fdb.connect(host=host, database=path, user=user, password=pswd2, charset='UTF8')
and many combinations for the path of ubuntu fdb file. How can I solve this problem? Is it about the wrong host, port, password, or something?
I got this error all the time
Traceback (most recent call last):
File "/home/ubuntu/test.py", line 24, in <module>
conn = connection()
File "/home/ubuntu/test.py", line 15, in connection
con = fdb.connect(host=host, database=path, user=user, password=pswd2, charset='UTF8')
File "/home/ubuntu/.local/lib/python3.10/site-packages/fdb/fbcore.py", line 869, in connect
raise exception_from_status(DatabaseError, _isc_status,
fdb.fbcore.DatabaseError: ('Error while connecting to database:\n- SQLCODE: -902\n- Unable to complete network request to host "15.206.100.218".\n- Failed to establish a connection.', -902, 335544721)

Can't connect to MySQL server on 'localhost:3306' (10061) During handling of the above exception in python

i wrote a program to check if program can make connection to MySQL server and if cant connect to server print a error message and this is the program that i wrote
import mysql.connector
is_connected = False
def check_connection():
global is_connected
try:
db = mysql.connector.connect(
host="localhost",
user="root",
passwd=""
)
if db.is_connected():
print("Connected to MySQL database")
is_connected = True
except:
print("Unable to connect to MySQL database check if mysql server is running on defaul port which is 3306")
return is_connected
the whole objective here is print a error message when MySQL server is not running so i stop the server and run the file it works fine when in its own file but when it import to another file and call the check_cconnection method its give this error
Traceback (most recent call last):
File "C:\Users\thevi\AppData\Local\Programs\Python\Python310\lib\site-packages\mysql\connector\connection_cext.py", line 236, in _open_connection
self._cmysql.connect(**cnx_kwargs)
_mysql_connector.MySQLInterfaceError: Can't connect to MySQL server on 'localhost:3306' (10061)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "t:\Projects\Python_Projects\assignment\anatha.py", line 2, in <module>
from create_db import createDb
File "t:\Projects\Python_Projects\assignment\create_db.py", line 3, in <module>
db = mysql.connector.connect(
File "C:\Users\thevi\AppData\Local\Programs\Python\Python310\lib\site-packages\mysql\connector\__init__.py", line 272, in connect
return CMySQLConnection(*args, **kwargs)
File "C:\Users\thevi\AppData\Local\Programs\Python\Python310\lib\site-packages\mysql\connector\connection_cext.py", line 85, in __init__
self.connect(**kwargs)
File "C:\Users\thevi\AppData\Local\Programs\Python\Python310\lib\site-packages\mysql\connector\abstracts.py", line 1028, in connect
self._open_connection()
File "C:\Users\thevi\AppData\Local\Programs\Python\Python310\lib\site-packages\mysql\connector\connection_cext.py", line 241, in _open_connection
raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
mysql.connector.errors.DatabaseError: 2003 (HY000): Can't connect to MySQL server on 'localhost:3306' (10061)
how to ger rid of this error

Error connection to postgres database using psycopg2

I am trying to connect to a postgres database to run some queries for validation. Trying to establish connection via psycopg2. Have tried passing actual values for host instead of variables.
Tried the connection using psql to verify the connection parameters, password etc and they are right too.
But with the code below it always errors out with the below error
conn1 = psycopg2.connect(host=db_host,database=db_instance_name,user=masterusername,port=db_port,password=masterpassword)
cur1 = conn1.cursor()
print ('\n************Connection is successful ************ \n')
Traceback (most recent call last):
File "restored_db_details_draft.py", line 50, in <module>
conn_test = psycopg2.connect(host="***",database="my_db_name",user="master",port="9876",password="****")
File "/Users/me/Library/Python/3.8/lib/python/site-packages/psycopg2/__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.

Connecting to Kerberized hadoop cluster using python module impyla

I am using impyla module to connect to kerberized hadoop cluster. I want to access
hiveserver2/hive but I was getting the below error:
test_conn.py
from impala.dbapi import connect
import os
connection_string = 'hdp296m1.XXX.XXX.com'
conn = connect(host=connection_string, port=21050,auth_mechanism="GSSAPI",kerberos_service_name='testuser#Myrealm.COM',password='testuser')
cursor = conn.cursor()
cursor.execute('select count(*) form t_all_types_simple_t')
print cursor.description
results = cursor.fetchall()
Stacktrace:
[vagrant#localhost vagrant]$ python test_conn.py
Traceback (most recent call last):
File "test_conn.py", line 4, in <module>
conn = connect(host=connection_string, port=21050, auth_mechanism="GSSAPI",kerberos_service_name='testuser#Myrealm.COM',password='testuser')
File "/usr/lib/python2.7/site-packages/impala/dbapi.py", line 147, in connect
auth_mechanism=auth_mechanism)
File "/usr/lib/python2.7/site-packages/impala/hiveserver2.py", line 758, in connect
transport.open()
File "/usr/lib/python2.7/site-packages/thrift_sasl/__init__.py", line 61, in open
self._trans.open()
File "/usr/lib64/python2.7/site-packages/thrift/transport/TSocket.py", line 101, in open
message=message)
thrift.transport.TTransport.TTransportException: Could not connect to hdp296m1.XXX.XXX.com:21050
testuser is my kerberos principal which I will be using to do kinit.

Your connection appears to be incorrect.. Try,
from impala.dbapi import *
import sys, os
# set your parms
host=os.environ.get("CDH_HIVE",'x.x.x.x')
port=os.environ.get("CDH_HIVE_port",'10000')
auth_mechanism=os.environ.get("CDH_auth",'GSSAPI')
user='hive'
db='mydb'
# No password use kinit
password=''
# hive is principal with krb
kbservice='hive'
class Hive:
def __init__(self,db):
self.database=db
self.__conn = connect(host=host,
port=port,
auth_mechanism=auth_mechanism,
user=user,
password=password,
database=db,
kerberos_service_name=kbservice
)
self.__cursor = self.__conn.cursor()
h = Hive(db)

Psycopg2 could not connect to server

I'have a little problem when I want to connect to my DB with psycopg2 and python. I have this little script :
#!/usr/bin/python3
import time
import psycopg2
import sys
def main():
# Get a connection
conn = psycopg2.connect(database='my_db', host='10.10.2.1', port='5433', user='me', password='my_password_that_i_dont_show_here')
# conn.cursor will return a cursor object, to perform queries
cursor = conn.cursor()
# Execute our query
cursor.execute("select date(created_at), email, firstname, lastname, locale from users where date(created_at) = current_date;")
# retrieve the records from the database
records = cursor.fetchall()
print(records)
if __name__ == "__main__":
main()
That worked well on windows but now I'm on ubuntu and I have this error :
Traceback (most recent call last):
File "Bureau/script.py", line 29, in <module>
main()
File "Bureau/script.py", line 15, in main
conn = psycopg2.connect(database='my_db', host='10.10.2.1', port='5433', user='me', password='best_password_ever')
File "/usr/local/lib/python3.5/dist-packages/psycopg2/__init__.py", line 164, in connect
conn = _connect(dsn, connection_factory=connection_factory, async=async)
psycopg2.OperationalError: could not connect to server: Connection timed out
Is the server running on host "10.10.2.1" and accepting
TCP/IP connections on port 5433?