Disassembling strings and turning them into function parameters

[mercuryprey@gmail.com]

Hi,
I'm pretty new to Python, to programming overall...so how would I make
something where the user inputs multiple words in a string - like
"connect 123.123.123.123 21 user password" or similar, and then I can
split this string up to pass these arguments to a function like
ftp_connect(ip, port, user, pw) etc...? I have no idea how to "break"
the string up so I can get these out of it..


thanks for answers,
munin

[Peter Hansen]

Re: Disassembling strings and turning them into function parameters

mercuryprey@gma il.com wrote:[color=blue]
> Hi,
> I'm pretty new to Python, to programming overall...so how would I make
> something where the user inputs multiple words in a string - like
> "connect 123.123.123.123 21 user password" or similar, and then I can
> split this string up to pass these arguments to a function like
> ftp_connect(ip, port, user, pw) etc...? I have no idea how to "break"
> the string up so I can get these out of it..[/color]

The .split() method of strings should work for you.

If you need more, provide more background... and maybe
let us know that this isn't homework. ;-)

-Peter

[Fredrik Lundh]

Re: Disassembling strings and turning them into function parameters

<mercuryprey@gm ail.com> wrote:
[color=blue]
> I'm pretty new to Python, to programming overall...so how would I make
> something where the user inputs multiple words in a string - like
> "connect 123.123.123.123 21 user password" or similar, and then I can
> split this string up to pass these arguments to a function like
> ftp_connect(ip, port, user, pw) etc...? I have no idea how to "break"
> the string up so I can get these out of it..[/color]

you can use the split() method to split on whitespace:
[color=blue][color=green][color=darkred]
>>> s = "connect 123.123.123.123 21 user password"
>>> s.split()[/color][/color][/color]
['connect', '123.123.123.12 3', '21', 'user', 'password']

btw, the cmd module might be useful for your project:

http://effbot.org/librarybook/cmd.htm

http://docs.python.org/lib/module-cmd.html

</F>

[M.E.Farmer]

Re: Disassembling strings and turning them into function parameters

mercuryp...@gma il.com wrote:[color=blue]
> Hi,
> I'm pretty new to Python, to programming overall...so how would I[/color]
make[color=blue]
> something where the user inputs multiple words in a string - like
> "connect 123.123.123.123 21 user password" or similar, and then I can
> split this string up to pass these arguments to a function like
> ftp_connect(ip, port, user, pw) etc...? I have no idea how to "break"
> the string up so I can get these out of it..
>
>
> thanks for answers,
> munin[/color]

Ok well this is pretty basic but it sounds wrong on some level.
Maybe you should post some code, you will get better responses.
You could try something like:
Py>stuff = "connect 123.123.123.123 21 user password"
Py>parts_list = stuff.split()# can handle other seperators
Py>print parts_list
['connect', '123.123.123.12 3', '21', 'user', 'password']
Py>def StrFtp(userinfo ):
.... parts = userinfo.slpit( )
.... funktion, ip, port, usedr, pw = parts
.... funktion = funktion.lower( )
.... if funktion == 'connect'
.... return ftp_connect(ip, port, user, pw)
.... elif funktion == 'other_function _name_here':
.... return 'your other action here'
.... else:
.... return None

Py>ftpconnect = StrFtp("connect 123.123.123.123 21 user password")

Also add asserts and error checking all through the code for malformed
input.
hth,
M.E.Farmer

[mercuryprey@gmail.com]

Re: Disassembling strings and turning them into function parameters

Hey,
that's exactly what I need! Thanks for your help, the others too of
course :) Didn't expect to get answers so quickly..