Processing multiple files in Python, and matching on fields -


i have number of csv files need compare 1 'master list', , determine, based on unique id, if these other files contain entries key.

what easiest way in python be? i.e kind of structures suggest read data into, , how suggest iterate through it?

here example of data , output looking for.

**master list**  unique id : file name : file version : responsible party  j578221 : expander : 1.23 : joe bloggs  kk89821 : top : 0.9 : mike smith   **location x**  region : file name : unique id  usa : acme expander : j578221  usa : acme tail : mk33431  **location z**  reqion : file name : unique id : date added  china : expander : j578221 : 03-04-2012  hk : acme top : kk89821 : 06-07-2012  **output:**  unique id : file name : file version : responsible party : in location x : in location z  j578221 : expander : 1.23 : joe bloggs : yes : yes  kk89821 : top : 0.9 : mike smith : no : yes

the easiest way might using regular expressions (see documentation here) retrieve key of each line in master file. (you might need evaluate structure of files first , modify expression if position of unique-id changes.)

store id list in dictionary key , use list value, indicating files in each of master keys included.

you afterwards filter dictionary ids (keys) 1 or multiple files or files containing 1 particular id.


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