Re: [Tutor] connect to a remote machine - Linux
Thank you for the great explanation, Danny.. I was confused... Thank you all for your help! PatriciaOn 6/11/06, Danny Yoo [EMAIL PROTECTED] wrote: I'm sorry. I think I didn't explain myself well. My problem is not with the database.. The part I'm not sure how to do is connect to the remote computer..Hi Patricia,There's some confusion here.Let's get that out in the open. It sounds like you have a remote server.That server provides login shellservice through ssh, and this login shell service runs on port 22, Ithink.But if your server is running MySQL, it is very likely that it provides network access to that MySQL database through port 3306.I think you believe that ssh login access is required to access MySQL onyour remote network server.But this is not necessarily true: one can access MySQL remotely without having a login shell account into themachine.That is, rather than: Client Login through SSH Execute mysql clientwhich is three steps, the conventional route here is: Client Connect to networked MySQL using a database driver(MySQLdb)which is more direct.See: MySQLdb: http://sourceforge.net/projects/mysql-pythonas well as: http://www.devshed.com/c/a/Python/MySQL-Connectivity-With-Python/ However, this does mean that the remote MySQL server has to be set up witha separate MySQL username/password account.That is, MySQL keeps its ownset of usernames and passwords that can be separate from the shell logins.Also, mysqld --- the software that drives the MySQL server --- has to beenabled to work across tcp.That requirement sounds obvious enough, butit is not the default in the MySQL server installs I've seen lately, so double check this with your database system administrator.In short: youcan not automatically assume that having login access to the machine willgive you MySQL database access, and visa-versa.Does this make sense so far? I read somewhere that os.popen would work, but I'm not sure if that will do for meAlmost certainly no.popen is not for external database access.People have written databasedrivers to solve this problem for you already.It is perhaps possible to bend popen() in such a way to access MySQL, but this will involve anamount of work to get right, and there will be a lot of ways of getting itwrong.*grin*So I'd recommend changing this question from: How do I get popen() to access MySQL across a remote interface? to a more general: How do Iconnect to MySQL from Python?The link above to MySQLdb will give youthe software necessary to connect your client to a MySQL server, and the link to the Devshed article is a tutorial on how to use it effectively.Good luck! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] connect to a remote machine - Linux
On Sun, 2006-06-11 at 15:19 +, Patricia wrote: Hi All, I need to connect to a remote computer on the same network to store data into its mysql database, and I need to do this using python script. Although I've used mysql and python before, I have no idea how to access a remote computer with Python. Also, I would have to enter a passphrase and password to successfully connect to it.. I'd appreciate any help. Thanks!! Patricia ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] connect to a remote machine - Linux
On Sun, 2006-06-11 at 15:19 +, Patricia wrote:
Hi All,
I need to connect to a remote computer on the same network to store data into
its mysql database, and I need to do this using python script.
Although I've used mysql and python before, I have no idea how to access a
remote computer with Python. Also, I would have to enter a passphrase and
password to successfully connect to it..
I could not simply cut and paste working code, but this should get you
started. There is no programming difference in using a remote sql
server.
import MySQLdb
dbparms = {
'host':'dbserver.example.com', # name of sql server
# (localhost for your local computer)
'user':'dbusername',# your identifier
'passwd':'dbpassword', # your password
'db':'dbname_to_use', # initial database
}
conn = MySQLdb.connect( **dbparms)
I'd appreciate any help.
Thanks!!
Patricia
___
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Venix Corp
___
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Re: [Tutor] connect to a remote machine - Linux
Try looking at PyDO - This provides an interface between Python and your database. This allows you to change your database at a later time and not have to change any Python. The excerpt below is from: http://skunkweb.sourceforge.net/PyDO2/api/html/public/pydo-module.html PyDO (Python Data Objects) is an object-relational wrapper for relational databases. It provides a convenient API for retrieving and manipulating data without constraining in any way how the data is persisted at the RDBMS level. Supported databases are: * postgresql * mysql * sqlite * mssql * oracle -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Patricia Sent: Sunday, June 11, 2006 4:19 PM To: tutor@python.org Subject: [Tutor] connect to a remote machine - Linux Hi All, I need to connect to a remote computer on the same network to store data into its mysql database, and I need to do this using python script. Although I've used mysql and python before, I have no idea how to access a remote computer with Python. Also, I would have to enter a passphrase and password to successfully connect to it.. I'd appreciate any help. Thanks!! Patricia ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] connect to a remote machine - Linux
I'm sorry. I think I didn't explain myself well. My problem is not with the database.. The part I'm not sure how to do is connect to the remote computer..I read somewhere that os.popen would work, but I'm not sure if that willdo for me because I have to enter a passphrase and password to connect to the remote machine. Any ideas?? Thanks, Patricia On 6/11/06, Roy Mac [EMAIL PROTECTED] wrote: Try looking at PyDO - This provides an interface between Python and yourdatabase.This allows you to change your database at a later time and not have to change any Python.The excerpt below is from:http://skunkweb.sourceforge.net/PyDO2/api/html/public/pydo-module.html PyDO (Python Data Objects) is an object-relational wrapper forrelational databases.It provides a convenient API for retrieving andmanipulating data without constraining in any way how the data ispersisted at the RDBMS level.Supported databases are: * postgresql* mysql* sqlite* mssql* oracle-Original Message-From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED]] On BehalfOf PatriciaSent: Sunday, June 11, 2006 4:19 PMTo: tutor@python.orgSubject: [Tutor] connect to a remote machine - LinuxHi All, I need to connect to a remote computer on the same network to store datainto its mysql database, and I need to do this using python script.Although I've used mysql and python before, I have no idea how to access a remote computer with Python. Also, I would have to enter a passphrase andpassword to successfully connect to it..I'd appreciate any help.Thanks!!Patricia___ Tutor maillist-Tutor@python.orghttp://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] connect to a remote machine - Linux
(back on list)
On Sun, 2006-06-11 at 18:59 -0400, Patricia G. wrote:
I'm sorry. I think I didn't explain myself well. My problem is not
with the database.. The part I'm not sure how to do is connect to the
remote computer..
MySQL will accept connections from other computers. It listens on port
3306. There are network setup and security issues, but those would be
outside the scope of a Python database program.
I read somewhere that os.popen would work, but I'm not sure if that
will do for me because I have to enter a passphrase and password to
connect to the remote machine.
I presume that was using os.popen to talk to stdin/stdout files
connected to a telnet or ssh session established from outside Python.
That is likely to prove pretty clumsy for all but the simplest cases.
Any ideas??
Logging on to a remote computer should not have anything to do with
accessing a remote MySQL database.
ssh would probably be the preferred way to login to a remote computer.
http://www.lag.net/paramiko/
would appear to do the trick.
If you're stuck with telnet, the stdlib has a telnetlib module that
would help.
http://pexpect.sourceforge.net/
Provides an expect like module to help manage a terminal session
conversation.
In general, program-to-program interaction between computers works best
with protocols that were designed for programs. Telnet expects a person
who will interpret error strings, not type too quickly, and understand
(and wait for) prompts.
Obviously, I don't know your situation, but scripting remote terminal
sessions should be a last resort. (I used to do it a lot (15 - 20 years
ago) over serial connections where there was no alternative protocol.)
Thanks,
Patricia
On 6/11/06, Python [EMAIL PROTECTED] wrote:
On Sun, 2006-06-11 at 15:19 +, Patricia wrote:
Hi All,
I need to connect to a remote computer on the same network
to store data into
its mysql database, and I need to do this using python
script.
Although I've used mysql and python before, I have no idea
how to access a
remote computer with Python. Also, I would have to enter a
passphrase and
password to successfully connect to it..
I could not simply cut and paste working code, but this should
get you
started. There is no programming difference in using a remote
sql
server.
import MySQLdb
dbparms = {
'host':'dbserver.example.com', # name of sql server
# (localhost for your local
computer)
'user':'dbusername',# your identifier
'passwd':'dbpassword', # your password
'db':'dbname_to_use', # initial database
}
conn = MySQLdb.connect( **dbparms)
I'd appreciate any help.
Thanks!!
Patricia
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
--
Lloyd Kvam
Venix Corp
--
Lloyd Kvam
Venix Corp
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] connect to a remote machine - Linux
I'm sorry. I think I didn't explain myself well. My problem is not with the database.. The part I'm not sure how to do is connect to the remote computer.. Hi Patricia, There's some confusion here. Let's get that out in the open. It sounds like you have a remote server. That server provides login shell service through ssh, and this login shell service runs on port 22, I think. But if your server is running MySQL, it is very likely that it provides network access to that MySQL database through port 3306. I think you believe that ssh login access is required to access MySQL on your remote network server. But this is not necessarily true: one can access MySQL remotely without having a login shell account into the machine. That is, rather than: Client Login through SSH Execute mysql client which is three steps, the conventional route here is: Client Connect to networked MySQL using a database driver (MySQLdb) which is more direct. See: MySQLdb: http://sourceforge.net/projects/mysql-python as well as: http://www.devshed.com/c/a/Python/MySQL-Connectivity-With-Python/ However, this does mean that the remote MySQL server has to be set up with a separate MySQL username/password account. That is, MySQL keeps its own set of usernames and passwords that can be separate from the shell logins. Also, mysqld --- the software that drives the MySQL server --- has to be enabled to work across tcp. That requirement sounds obvious enough, but it is not the default in the MySQL server installs I've seen lately, so double check this with your database system administrator. In short: you can not automatically assume that having login access to the machine will give you MySQL database access, and visa-versa. Does this make sense so far? I read somewhere that os.popen would work, but I'm not sure if that will do for me Almost certainly no. popen is not for external database access. People have written database drivers to solve this problem for you already. It is perhaps possible to bend popen() in such a way to access MySQL, but this will involve an amount of work to get right, and there will be a lot of ways of getting it wrong. *grin* So I'd recommend changing this question from: How do I get popen() to access MySQL across a remote interface? to a more general: How do I connect to MySQL from Python? The link above to MySQLdb will give you the software necessary to connect your client to a MySQL server, and the link to the Devshed article is a tutorial on how to use it effectively. Good luck! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
