Keyword substitution in string

[Ondrej Krajicek]

Hello,

in my application, I want to do keyword substituion in
a string from a dictionary. The problem is indeed
easy to solve, but seems quite common to me, so I wonder
wheter there is already a function in Python which
does just that.

I want to substitute values for keywords in strings,
the keywords and values are stored in a dictionary.

Something like this:

def subst(string, dict):
...

where:

subst('Hello, <key1> <key2>!', {'key1': 'Python', 'key2': 'rules' })

gives:

'Hello, Python rules!'

The keyword quoting style does not matter.

Thanks,

Ondra

--
____________________________\\--//_________________________
Ondrej Krajicek \\// kr******@ics.muni.cz
Institute of Computer Science,||Masaryk University Brno, CR
_____________________________//\\__________________________

[Tim Jarman]

On 12 Aug 2004, at 18:43, Ondrej Krajicek wrote:

Hello,

in my application, I want to do keyword substituion in
a string from a dictionary. The problem is indeed
easy to solve, but seems quite common to me, so I wonder
wheter there is already a function in Python which
does just that.

I want to substitute values for keywords in strings,
the keywords and values are stored in a dictionary.

Something like this:

def subst(string, dict):
...

where:

subst('Hello, <key1> <key2>!', {'key1': 'Python', 'key2': 'rules' })

gives:

'Hello, Python rules!'

The keyword quoting style does not matter.

Thanks,

Ondra

Yes - so common they already thought of it! See Library Reference
2.3.6.1 or here: http://docs.python.org/lib/typesseq-strings.html for
an example of exactly what you want.

HTH

Tim J

[Christopher T King]

On Thu, 12 Aug 2004, Ondrej Krajicek wrote:

in my application, I want to do keyword substituion in
a string from a dictionary. The problem is indeed
easy to solve, but seems quite common to me, so I wonder
wheter there is already a function in Python which
does just that.
Indeed there is:
subst('Hello, <key1> <key2>!', {'key1': 'Python', 'key2': 'rules' })

gives:

'Hello, Python rules!'

'Hello, %(key1)s %(key2)s!' % {'key1': 'Python', 'key2': 'rules'}

gives:

'Hello, Python rules!'

:)

Aside from the (key) after the %, this works just like normal %
substitution.

[Simon Dahlbacka]

"Ondrej Krajicek" <kr******@ics.muni.cz> wrote in message
news:I2********@news.muni.cz...

Hello,

in my application, I want to do keyword substituion in
a string from a dictionary. The problem is indeed
easy to solve, but seems quite common to me, so I wonder
wheter there is already a function in Python which
does just that.

I want to substitute values for keywords in strings,
the keywords and values are stored in a dictionary.

Something like this:

def subst(string, dict):
...

where:

subst('Hello, <key1> <key2>!', {'key1': 'Python', 'key2': 'rules' })

gives:

'Hello, Python rules!'

The keyword quoting style does not matter.

Are you aware of:

"Hello %(key1)s %(key2)s!" % {"key1":"Python", "key2":"rules"}

?