Charles Leviton wrote:
> I was recently given this task. it's a very IBM mainframe specific task
> so
> I'm not sure how to find equivalent terms in another environment. I will
> just use the mainframe terminology and hopefully y'all can figure out what
> I mean.
>
> Given a list of DBRM members create a JCL which has a series of bind
> statements for each DBRM.
>
> This is the tack I took. I have 3 input files
> a_ contains the fixed part of the JCL
> b_ contains the template for the bind statement.
> c_ contains the list of DBRMs
>
>
> This is the script I came up with...Would you critique it and let me know
> how I could have done it better?
Incremental changes that have not been mentioned:
You can use
with open(...) as fo:
...
instead of
fo = open(...)
...
fo.close()
> #create a series of bind statements
> fo = open('i:/text/jclout.txt', 'w')
> fi = open('i:/text/bindjclfirstpart.txt','rU')
> fibindjclvar = open('i:/text/bindjclvariable.txt','rU')
> filistofdbrms= open('i:/text/bindjcldbrmlist.txt','rU')
>
> varlines =[]
> varlines = fibindjclvar.readlines()
> for line in fi: #write out all the lines in the first part of JCL
> fo.write(line)
> fo.write('\n')
> varline = ''
> for dbrm in filistofdbrms:
dbrm will have a trailing newline that you probably need to strip:
dbrm = dbrm.strip()
> fo.write('\n')
> for index in range(0,9):
> if varlines[index].find('member') > 0:
find() is case-sensitive; you probably need find("MEMBER"). Also, find()
returns -1 when the token is not in the line. Because of the leeading spaces
in
> MEMBER
it doesn't matter here, but you should make it a habit to test
some_string.find(token) >= 0
or use the less errorprone variant
token in some_string
> varline = varlines[index] + '('+ dbrm + ')' + ' -'
> else:
> varline = varlines[index]
> fo.write(varline)
>
> fo.close()
> fi.close()
> fibindjclvar.close()
> filistofdbrms.close()
>
> The "variable" part of the bind statement is where I have to include the
> DBRM name. I look for the word 'member' in the template.
> Template looks like this (content of bindjclvariable.txt)
> BIND PACKAGE(PROD) -
> MEMBER
> OWNER(PRODOWNR) -
> QUALIFIER(PRODTBLS) -
> ISOLATION(CS) -
> EXPLAIN(YES) -
> ACTION(REPLACE) -
> CURRENTDATA(YES) -
> VALIDATE(BIND)
>
> Thanks!
Finally, throwing in some guesswork as I don't know JCL, here's how I would
attack your problem: Given
$ cat bindjcldbrmlist.txt
alpha
beta
$ cat bindjclfirstpart.txt
fixed
header
$ cat bindjclvariable.txt
BIND PACKAGE(PROD) -
MEMBER({0}) -
OWNER(PRODOWNR) -
QUALIFIER(PRODTBLS) -
ISOLATION(CS) -
EXPLAIN(YES) -
ACTION(REPLACE) -
CURRENTDATA(YES) -
VALIDATE(BIND)
$
the script
$ cat generate.py
with open('jclout.txt', 'w') as fo:
with open('bindjclfirstpart.txt','rU') as header:
fo.writelines(header)
with open('bindjclvariable.txt','rU') as fibindjclvar:
template = fibindjclvar.read()
with open('bindjcldbrmlist.txt','rU') as dbrms:
for dbrm in dbrms:
dbrm = dbrm.strip()
fo.write(template.format(dbrm))
produces the following output:
$ cat jclout.txt
fixed
header
BIND PACKAGE(PROD) -
MEMBER(alpha) -
OWNER(PRODOWNR) -
QUALIFIER(PRODTBLS) -
ISOLATION(CS) -
EXPLAIN(YES) -
ACTION(REPLACE) -
CURRENTDATA(YES) -
VALIDATE(BIND)
BIND PACKAGE(PROD) -
MEMBER(beta) -
OWNER(PRODOWNR) -
QUALIFIER(PRODTBLS) -
ISOLATION(CS) -
EXPLAIN(YES) -
ACTION(REPLACE) -
CURRENTDATA(YES) -
VALIDATE(BIND)
$
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