Can not identify some LHR item records

[Frank Scaturro]

For some reason, there are some item records that pymarc is having trouble identifying them and the 583 field that they have. The bib comes back with no items attached.

I'm using this code to identify LHR item records....
record_type = record.leader[6]
record_type in ['u', 'x']:  

Frank

[Ed Summers]

Hi Frank,

Are you able to share a record that exhibits this problem?

//Ed

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[Frank Scaturro]

Hi Ed,  this is from the original mrk file that contains all types of 583  print holdings. (shortened snippet shown below))  the top is the bib and the bottom is the LHR. Also the 004 having the  bib number in it was from the move to oclc. Its not something I can rely on for every record. And the goal is to identify the exitance of  $fEAST records and then send the bibs to a new file called EAST.mrc

=LDR  02921cam a2200481 i 4500
=001  ocm00001752\
=003  OCoLC
=005  20250423213018.0
=008  690328m19681969inu\\\\\\b\\\\001\0\eng\\
=010  \\$a   68027576

 

=LDR  00564cv  a2200169zi 4500
=001  359332255
=003  OCoLC
=004  ocm00001752\
=007  zu
=008  2105050u\\\\8\\\0001aaeng0241213
=014  1\$a.b11324144$bZIH
=583  1\$acommitted to retain$c20160630$d20310630$fEAST$uhttp://eastlibraries.org/retained-materials$zEAST$5NHemH

[Andy Kohler]

Hi Frank -

I may be misunderstanding, but if your code is looking for LDR/06 in ['u', 'x']

> record_type = record.leader[6]
> record_type in ['u', 'x']:

Then given your sample records (showing LDR only)

=LDR  02921cam a2200481 i 4500

=LDR  00564cv  a2200169zi 4500

The bib record has LDR/06 = a, and the LHR has LDR/06 = v.  Neither matches ['u', 'x'], 

--Andy 

[Frank Scaturro]

Hi Andy, 

it was as simple as adding a "v" for matching. What I find strange though, is that I still have to check every leader to manually identify the BIB and the LHR. I originally thought that type leg work was built into pymarc.

Frank

[Andrew Hankinson]

It depends what you mean by "leg work." 

You could use the `type_of_record` property on the Leader object:

https://gitlab.com/pymarc/pymarc/-/blob/main/pymarc/leader.py?ref_type=heads#L120

record_type = record.leader.type_of_record  # equivalent to record.leader[6]

What sort of "automatic" determination would you expect? 

-Andrew

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