I've recently installed the official MySQL extension for Python. However, when connecting to the server it asks me to select the database, but I have not made a database yet.
I don't really know what to do here. So I tried to connect using my information without the database but received errors with the following code:
import mysql.connector
cnx = mysql.connector.connect(user='ubuntulogin', password='ubuntupassword',
host='localhost')
cursor = cnx.cursor()
query = ("CREATE DATABASE database")
cursor.execute(query)
cursor.close()
cnx.close()
Please let me know any issues with my code or how to get MySQL information when I don't know mydatabase name.
Thanks
EDIT: My error message when running the code was:
File "/home/liam/sqltest.py", line 3, in <module>
cnx = mysql.connector.connect(user='ubuntulogin', password='ubuntupassword', host='localhost')
File "/usr/lib/python2.7/dist-packages/mysql/connector/__init__.py", line 162, in connect
return MySQLConnection(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 129, in __init__
self.connect(**kwargs)
File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 454, in connect
self._open_connection()
File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 417, in _open_connection
self._socket.open_connection()
File "/usr/lib/python2.7/dist-packages/mysql/connector/network.py", line 475, in open_connection
errno=2003, values=(self.get_address(), _strioerror(err)))
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'localhost:3306' (111 Connection refused)
Okay, so it turns out that I am a complete idiot. I was under the impression that MySQL was pre-installed and running since I am used to PHP. However, I just installed it and use my code above and everything seems to be working.
Thanks to #DYZ for pointing out that it looked like I hadn't started the MySQL server and my credentials were incorrect (which turned out to be both true.
You forgot something)
cursor.execute("CREATE DATABASE database;")
Related
Can someone please help me? I am trying to make a simple python - MySQL connection. the code is running on my Dell-Windows Laptop, while the server is running on my Acer-Linux Laptop, they are connected on the same network. But upon running the query it prompts me with this error : Firewall is disabled for both. I tried pinging both of them vise versa and is working. In fact, I have a program with LibreOffice Base and they are interacting properly. But when I try to translate just a simple query in PYTHON seems like it is not working, I just don't know what could be the error on my code. Thank you so much for you help.
Traceback (most recent call last):
File "C:\Users\JM Dela Cruz\Documents\pyproj\myproject\test1.py", line 3, in <module>
mydb = mysql.connector.connect(
File "C:\Users\JM Dela Cruz\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\mysql\connector\pooling.py", line 287, in connect
return MySQLConnection(*args, **kwargs)
File "C:\Users\JM Dela Cruz\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\mysql\connector\connection.py", line 137, in __init__
self.connect(**kwargs)
File "C:\Users\JM Dela Cruz\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\mysql\connector\abstracts.py", line 1095, in connect
self._open_connection()
File "C:\Users\JM Dela Cruz\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\mysql\connector\connection.py", line 533, in _open_connection
self._socket.open_connection()
File "C:\Users\JM Dela Cruz\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\mysql\connector\network.py", line 569, in open_connection
raise InterfaceError(
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on '198.168.101.42:3306' (10060 A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond)
My Python Code :
import mysql.connector
mydb = mysql.connector.connect(
host="198.168.101.42",
user="vsearch",
password="vsearchpasswd",
database="classicmodels",
port="3306"
)
mycursor = mydb.cursor()
_SQL="Select * From employees"
myresult = mycursor.execute(_SQL)
print(myresult.fetchall())
I am aware that this question has been asked multiple times, but I haven't found a question that pertains to the same issue I am dealing with. I have a MySQL database hosted on Google Cloud SQL. I am running a python script out of a Google Cloud VM to connect to the database to run queries. Everything used to run fine, but now I am getting the following error on my initial connection to the server.
File "/usr/local/lib/python3.5/dist-packages/pymysql/__init__.py", line 94, in Connect
return Connection(*args, **kwargs)
File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 327, in __init__
self.connect()
File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 597, in connect
self._get_server_information()
File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 966, in _get_server_information
packet = self._read_packet()
File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 656, in _read_packet
packet_header = self._read_bytes(4)
File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 702, in _read_bytes
CR.CR_SERVER_LOST, "Lost connection to MySQL server during query")
pymysql.err.OperationalError: (2013, 'Lost connection to MySQL server during query')
And here is the code I am using to connect to the server
connection = pymysql.connect(host='127.0.0.1',
user='xxxxxx',
password='xxxxxx',
database='foobar',
cursorclass=pymysql.cursors.DictCursor,
max_allowed_packet=16777216,
connect_timeout=100)
Initially, my connection code did not have the max_allowed_packet and connect_timeout, and it was working fine. After some research into my issue, these seemed to resolve others' issues, but it hasn't resolved mine.
You must add wait_timeout and start by 10000 and then see.
The other will not help, but i added iy you have another timeout that will not be catch by connection and wait timeout
interactive_timeout Number of seconds the server waits for activity on an interactive connection before closing it
wait_timeout Number of seconds the server waits for activity on a connection before closing it
It seems
use a mysql command right after the connection
SET session wait_timeout=300;
We have a HDInsight cluster with some tables in HIVE. I want to query these tables from Python 3.6 from a client machine (outside Azure).
I have tried using PyHive, pyhs2 and also impyla but I am running into various problems with all of them.
Does anybody have a working example of accessing a HDInsight HIVE from Python?
I have very little experience with this, and don't know how to configure PyHive (which seems the most promising), especially regarding authorization.
With impyla:
from impala.dbapi import connect
conn = connect(host='redacted.azurehdinsight.net',port=443)
cursor = conn.cursor()
cursor.execute('SELECT * FROM cs_test LIMIT 100')
print(cursor.description) # prints the result set's schema
results = cursor.fetchall()
This gives:
Traceback (most recent call last):
File "C:/git/ml-notebooks/impyla.py", line 3, in <module>
cursor = conn.cursor()
File "C:\Users\chris\Anaconda3\lib\site-packages\impala\hiveserver2.py", line 125, in cursor
session = self.service.open_session(user, configuration)
File "C:\Users\chris\Anaconda3\lib\site-packages\impala\hiveserver2.py", line 995, in open_session
resp = self._rpc('OpenSession', req)
File "C:\Users\chris\Anaconda3\lib\site-packages\impala\hiveserver2.py", line 923, in _rpc
response = self._execute(func_name, request)
File "C:\Users\chris\Anaconda3\lib\site-packages\impala\hiveserver2.py", line 954, in _execute
.format(self.retries))
impala.error.HiveServer2Error: Failed after retrying 3 times
With Pyhive:
from pyhive import hive
conn = hive.connect(host="redacted.azurehdinsight.net",port=443,auth="NOSASL")
#also tried other auth-types, but as i said, i have no clue here
This gives:
Traceback (most recent call last):
File "C:/git/ml-notebooks/PythonToHive.py", line 3, in <module>
conn = hive.connect(host="redacted.azurehdinsight.net",port=443,auth="NOSASL")
File "C:\Users\chris\Anaconda3\lib\site-packages\pyhive\hive.py", line 64, in connect
return Connection(*args, **kwargs)
File "C:\Users\chris\Anaconda3\lib\site-packages\pyhive\hive.py", line 164, in __init__
response = self._client.OpenSession(open_session_req)
File "C:\Users\chris\Anaconda3\lib\site-packages\TCLIService\TCLIService.py", line 187, in OpenSession
return self.recv_OpenSession()
File "C:\Users\chris\Anaconda3\lib\site-packages\TCLIService\TCLIService.py", line 199, in recv_OpenSession
(fname, mtype, rseqid) = iprot.readMessageBegin()
File "C:\Users\chris\Anaconda3\lib\site-packages\thrift\protocol\TBinaryProtocol.py", line 134, in readMessageBegin
sz = self.readI32()
File "C:\Users\chris\Anaconda3\lib\site-packages\thrift\protocol\TBinaryProtocol.py", line 217, in readI32
buff = self.trans.readAll(4)
File "C:\Users\chris\Anaconda3\lib\site-packages\thrift\transport\TTransport.py", line 60, in readAll
chunk = self.read(sz - have)
File "C:\Users\chris\Anaconda3\lib\site-packages\thrift\transport\TTransport.py", line 161, in read
self.__rbuf = BufferIO(self.__trans.read(max(sz, self.__rbuf_size)))
File "C:\Users\chris\Anaconda3\lib\site-packages\thrift\transport\TSocket.py", line 117, in read
buff = self.handle.recv(sz)
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host
According to the offical document Understand and resolve errors received from WebHCat on HDInsight, it said as below.
What is WebHCat
WebHCat is a REST API for HCatalog, a table, and storage management layer for Hadoop. WebHCat is enabled by default on HDInsight clusters, and is used by various tools to submit jobs, get job status, etc. without logging in to the cluster.
So a workaround way is to use WebHCat to run the Hive QL in Python, please refer to the Hive document to learn & use it. As reference, there is a similar MSDN thread discussed about it.
Hope it helps.
Technically you should be able to use the Thrift connector and pyhive but I haven't had any success with this. However I have successfully used the JDBC connector using JayDeBeAPI.
First you need to download the JDBC driver.
http://central.maven.org/maven2/org/apache/hive/hive-jdbc/1.2.1/hive-jdbc-1.2.1-standalone.jar
http://repo1.maven.org/maven2/org/apache/httpcomponents/httpclient/4.4/httpclient-4.4.jar
http://central.maven.org/maven2/org/apache/httpcomponents/httpcore/4.4.4/httpcore-4.4.4.jar
I put mine in /jdbc and used JayDeBeAPI with the following connection string.
edit: You need to add /jdbc/* to your CLASSPATH environment variable.
import jaydebeapi
conn = jaydebeapi.connect("org.apache.hive.jdbc.HiveDriver",
"jdbc:hive2://my_ip_or_url:443/;ssl=true;transportMode=http;httpPath=/hive2",
[username, password],
"/jdbc/hive-jdbc-1.2.1.jar")
I am using Python Pymysql to connect to AWS RDS db.
This was working all these days but now I am not able to connect to the db.
However when I am using the same machine and same credentials it does connect through Mysql workbench, but through pycharm this does not work.,
Code :
configParser = ConfigParser.RawConfigParser()
configFilePath = r'docs/credentials.cfg'
configParser.read(configFilePath)
User = configParser.get('aws-config','user')
Pswd = configParser.get('aws-config','pswd')
Host = configParser.get('aws-config','hostdps')
Databs = configParser.get('aws-config','databs')
db = pymysql.connect(host=Host, user=User, password=Pswd, db=Databs, charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor,local_infile=True)
Error :
File "/usr/local/lib/python2.7/dist-packages/pymysql/__init__.py", line 90, in Connect
return Connection(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 688, in __init__
self.connect()
File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 906, in connect
self._request_authentication()
File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1114, in _request_authentication
auth_packet = self._read_packet()
File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 961, in _read_packet
packet_header = self._read_bytes(4)
File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 995, in _read_bytes
"Lost connection to MySQL server during query (%s)" % (e,))
pymysql.err.OperationalError: (2013, 'Lost connection to MySQL server during query ([Errno 104] Connection reset by peer)')
How to make sure that this does not happen on production? (prevent such failures in the future).
why u not use connection pool for these?
connection pool can auto manage connection,so can fix this.
U can try any python mysql pool .
pool example
for this this link
or directly use github handy code .PyMysqlPool
I'm trying to use MySQL Connection/Python to connect to my database.
Here's the output I'm getting:
Traceback (most recent call last):
File "bh2000.py", line 33, in <module>
cnx = mysql.connector.connect(**config)
File "/Library/Python/2.7/site-packages/mysql/connector/__init__.py", line 155, in connect
return MySQLConnection(*args, **kwargs)
File "/Library/Python/2.7/site-packages/mysql/connector/connection.py", line 123, in __init__
self.connect(**kwargs)
File "/Library/Python/2.7/site-packages/mysql/connector/connection.py", line 430, in connect
self._open_connection()
File "/Library/Python/2.7/site-packages/mysql/connector/connection.py", line 393, in _open_connection
self._socket.open_connection()
File "/Library/Python/2.7/site-packages/mysql/connector/network.py", line 375, in open_connection
errno=2003, values=(self.get_address(), _strioerror(err)))
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'host xxx.db.1and1.com:3306' (8 nodename nor servname provided, or not known)
Here's the code I'm using:
import mysql.connector
cnx = mysql.connector.connect(user='xxx', password='xxx',
host='xxx.db.1and1.com',
database='xxx')
cnx.close()
Where am I going wrong?
Did you specify the correct port?
Is your MySQL server running?
Is a firewall blocking access?
Try removing anonymous user account from your MySQL server?
Default port if not specified is 3306. Otherwise there is nothing wrong with your code. The problem is with your MySQL server or the connection is being blocked by your firewall or the server firewall. Make sure port 3306 is open and not blocked.
db = mysql.connector.connect(user='xxx', password='xxx', host='xxx.db.1and1.com', port=3306)
I believe the answer is because the hosting service you use, 1and1.com, uses a firewall that blocks all outside access to their databases. You have to run the code from a url that they host or it will not work.
I use the same server and had to figure this out the hard way myself. Below is a copy of what they have on one of their pages:
Access to the database via your website/presence only Please always
establish the connection to your database via your website/presence.
For security reasons, it is not possible to access the database
directly, for example via your local computer (external ODBC
connection).
To protect your data, your MySQL database is located on a dedicated
database server that is protected by a firewall.
Add a port argument in the command.
cnx = mysql.connector.connect(user='myuser',
password='mypassword', host='localhost', port='3306', database='mydb')
I got the same error. Once crosscheck the details you have entered. The host must be in the format 127.0.0.1. There should not be any / after the url.
Use localhost instead of IP, if you are working on same server.
myConnection = mysql.connector.connect(user='uname', password='pass', host='localhost', port='3306', database='databasename')