printing variables

[s99999999s2003@yahoo.com]

hi
say i have variables like these

var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..

bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :

print var1, var2, var3, var4 ......etc...
thanks

[John Machin]

Re: printing variables


s99999999s2003@ yahoo.com wrote:

hi
say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :
>
print var1, var2, var3, var4 ......etc...
thanks

| >>var1 = 1
| >>var2 = 2
| >>variant = 3
| >>variegated = 4
| >>' '.join(str(v) for k, v in locals().iterit ems() if
k.startswith('v ar'))
| '1 2 3 4'

*BUT* why do you start off with those things in separate variables
instead of in some container (list, dict, object simulating a "record"
or "struct", ...?

[Fredrik Lundh]

Re: printing variables

s99999999s2003@ yahoo.com wrote:

say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...

do you often (or always) treat these as a collection ? why not just put
the values in a list (or tuple) instead ?

</F>

[Fredrik Lundh]

Re: printing variables

s99999999s2003@ yahoo.com wrote:

say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...

do you often (or always) treat these as a collection ? why not just put
the values in a list (or tuple) instead ?

</F>

[Gary Herron]

Re: printing variables

s99999999s2003@ yahoo.com wrote:

hi
say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :
>
print var1, var2, var3, var4 ......etc...
thanks
>
>

If you really don't want an array (list, or tuple) of these (i.e.,
var[1], var[2], var[3], ...), then you can get at a dictionary that
contains all the local variables -- names and values -- like this:

>>var1 = "blah"
>>var2 = "blahblah"
>>var3 = "blahblahbl ah"
>>var4 = "...."
>>locals()

{'var4': '....', 'var1': 'blah', 'var3': 'blahblahblah', 'var2':
'blahblah', '__builtins__': <module '__builtin__' (built-in)>,
'__file__': '/home/gherron/.startup.py', '__name__': '__main__',
'__doc__': None}

>>for v,k in locals().items( ):

.... if v.startswith('v ar'):
.... print k
....
.....
blah
blahblahblah
blahblah

>>>

Gary Herron

[Dan Bishop]

Re: printing variables

On Oct 5, 9:47 pm, s99999999s2...@ yahoo.com wrote:

hi
say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :
>
print var1, var2, var3, var4 ......etc...

def print_vars(var_ dict, prefix=''):
var_names = sorted(name for name in var_dict if
name.startswith (prefix))
for name in var_names:
print var_dict[name],
print

def example():
var1 = 'blah'
var2 = 'blahblah'
var3 = 'spam'
var4 = 'eggs'
ignored_var = 'foo'
print_vars(loca ls(), 'var')

[s99999999s2003@yahoo.com]

Re: printing variables


Fredrik Lundh wrote:

s99999999s2003@ yahoo.com wrote:
>

say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...

>
do you often (or always) treat these as a collection ? why not just put
the values in a list (or tuple) instead ?
>
</F>

Thanks all for the answers. Yup, i think i will use dicts/tuples/lists
instead...

[MonkeeSage]

Re: printing variables

s99999999s2003@ yahoo.com wrote:

Thanks all for the answers. Yup, i think i will use dicts/tuples/lists
instead...

Even though you should be using some kind of container, you can still
do what you origianlly asked for with relative ease...you just have to
use the evil eval function (gasp!):

for i in xrange(5):
if i == 0: continue
print eval("var%d" % i)

Regards,
Jordan

[Gerrit Holl]

Re: printing variables

On 2006-10-06 04:50:33 +0200, s99999999s2003@ yahoo.com wrote:

say i have variables like these
>
var1 = "blah"
var2 = "blahblah"
var3 = "blahblahbl ah"
var4 = "...."
var5 = "..."..
>
bcos all the variable names start with "var", is there a way to
conveniently print those variables out...
eg print var* ??
i don't want to do :
>
print var1, var2, var3, var4 ......etc...

Don't do this:

>>import fnmatch
>>var1, var2, var3 = "foo", "bar", "baz"
>>for k in fnmatch.filter( locals(), "var*"):

.... print locals()[k]
....
foo
baz
bar

This is evil.
It's unpythonic.
This is yet another way to do it - QED.

Gerrit.

[hanumizzle]

Re: printing variables

On 10/6/06, Gerrit Holl <gerrit@nl.linu x.orgwrote:

>import fnmatch
>var1, var2, var3 = "foo", "bar", "baz"
>for k in fnmatch.filter( locals(), "var*"):

... print locals()[k]
...
foo
baz
bar
>
This is evil.
It's unpythonic.

It's so evil, Perl 4 would look upon it in scorn.

-- Theerasak