python - How do I write a csv file from a dictionary with multiple values per key? -


i posted question part of question. need write csv file in gives me name of technician, date worked on tract, , number of tracts on date. found way needed data dictionary key being name of technician , value being date , count using cursor through arcmap find data, using code so:

desc = arcpy.describe(inlayer) fields =  desc.fields field in fields:     srow in cursor:         tech = srow.getvalue("technician")         moddate = srow.getvalue("modifieddate")         formdate = moddate.strftime("%m-%d-%y")         if tech == "elizabeth":             escontract = escontract + 1             eslist = []                         eslist.append(formdate)             estech.update(eslist)             date in estech.iteritems():                 if tech in listedtech:                     listedtech[tech].append(date)                 else:                     listedtech[tech] = [date]

where estech counter dictionary defined earlier , listedtech empty dictionary defined earier well.

listedtech when printed appear like: 

listedtech = {u'elizabeth': [('05-11-2015', 6), ('05-13-2015', 16), ('05-12-2015', 16)] , u'michael': [('05-11-2015', 3)]}

how take dictionary named listedtech , turn csv file?

update

i have made dictionary list of dictionary called nl. when print list of dictionaries, this:

nl = [{u'elizabeth': [('05-11-2015', 6), ('05-13-2015', 16), ('05-12-2015', 16)]} , {u'michael': [('05-11-2015', 3)]}]

however, having issues still getting csv. when did dictwriter, came out weird each technician had own column 1 row of associated values csv file looks

elizabeth | michael
('05-11-2015', 6), ('05-13-2015', 16), ('05-12-2015', 16) | ('05-11-2015', 3)

instead of how want in each value on different row. code used this:

with open(csvfilename, 'w') f:     fieldnames = ['elizabeth', 'michael']     dict_writer = csv.dictwriter(f, fieldnames = fieldnames)     dict_writer.writeheader()     dict_writer.writerows(nl)

what doing wrong?

you can use csv.dictwriter. docs:

import csv  open('names.csv', 'w') csvfile:     fieldnames = ['first_name', 'last_name']     writer = csv.dictwriter(csvfile, fieldnames=fieldnames)      writer.writeheader()     writer.writerow({'first_name': 'baked', 'last_name': 'beans'})     writer.writerow({'first_name': 'lovely', 'last_name': 'spam'})     writer.writerow({'first_name': 'wonderful', 'last_name': 'spam'})

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