Hi Mike, and welcome!
On 02/08/13 03:51, [email protected] wrote:
Hi all,
I'm trying to use dictionary key values as arguments being passed via
subprocess. The following is supposed to use argv arguments passed for the
target host, and direction to turn the ipmi interface up on or off. When I
run it I get an error about TypeError: format requires a mapping
Would you like us to guess which line gives that error? I love guessing games!
Ah, who am I fooling? Actually I hate them. Please don't expect us to guess
where the error is, and don't assume we're going to run your code and see the
same error.
- we might not get the same error, for many reasons
- or we might not be willing, or able, to run the code
In general, the most valuable piece of information Python will ever give you is the full
traceback it prints when an error occurs, starting with the line "Traceback"
and ending at the actual error message. Please copy and paste the entire traceback --
don't retype, simplify, summarize or abbreviate it.
In the meantime, I'm going to guess where your error might be:
script, targ, switch = argv
Here you assign targ to one of the items of argv. Unless you've done something
really weird elsewhere, targ will be a string.
def on():
turnOn = ['ipmitool', '-I', 'lan', '-U', '%(usern)s' % targ,
Here you call the % string interpolation operator and try to look up the name
'usern' from what ought to be a dict or other mapping, but is actually just a
string.
'%(passw)s' % targ,
And again.
'%(hostn)s' % targ,
And one more time.
You can replicate this error trivially:
py> '%(spam)s' % 'hello'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: format requires a mapping
Solution: targ is a string, not a mapping. You need to convert it into a
mapping.
If anyone suggests you use eval(targ), hit them with a halibut. eval() is not
safe with untrusted data, and can execute arbitrary code. Instead, you can
either parse targ yourself, or try using ast.literal_eval.
--
Steven
_______________________________________________
Tutor maillist - [email protected]
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
