Question

I’m experience strange issue while resulting the dict of dict in django template.

data = [{'hrs': 9.0, 'ld': u'pname', 'dn': u'TS', 'ist': u'TS', 'act': u'O', 'date': datetime.date(2011, 9, 19), 'id': 1119556},
 {'hrs': 9.0, 'ld': u'pname', 'dn': u'TS', 'ist': u'TS', 'act': u'Ti', 'date': datetime.date(2011, 9, 21), 'id': 1119558},
 {'hrs': 2.5, 'ld': u'pname', 'dn': u'TS', 'ist': u'dmin', 'act': u'POC', 'date': datetime.date(2011, 9, 20), 'id': 1119577},
 {'hrs': 0.5, 'ld': u'pname', 'dn': u'SMgr', 'ist': u'SMgr', 'act': u'PL', 'date': datetime.date(2011, 9, 20), 'id': 1119578},
 {'hrs': 2.0, 'ld': u'pname', 'dn': u'SMgr', 'ist': u'TS', 'act': u'Mting', 'date': datetime.date(2011, 9, 20), 'id': 1119579},
 {'hrs': 8.0, 'ld': u'sname', 'dn': u'holiday', 'ist': u'holiday', 'act': u'PL', 'date': datetime.date(2011, 9, 19), 'id': 1119455},
 {'hrs': 8.0, 'ld': u'sname', 'dn': u'holiday', 'ist': u'holiday', 'act': u'PL', 'date': datetime.date(2011, 9, 21), 'id': 1119457}, 
 {'hrs': 1.0, 'ld': u'sname', 'dn': u'TS', 'ist': u'TS', 'act': u'O', 'date': datetime.date(2011, 9, 20), 'id': 1119566},
 {'hrs': 7.0, 'ld': u'sname', 'dn': u'PD', 'ist': u'PD', 'act': u'LOP', 'date': datetime.date(2011, 9, 20), 'id': 1119567}]

Using this list of dict wrote below logic

results = collections.defaultdict(dict)

for fetch in data:
    user = fetch['ld']
    get_id = fetch['id']
    adata = '%s/%s/%s/%s' % (fetch['dn'], fetch['ist'], fetch['act'], fetch['hrs'])
    row = results[user]
    row['user'] = user
    dt = str(fetch['date'])
    row[dt] = adata

this give me below output

Results :

 {u'sname': {'2011-09-21': u'holiday/holiday/PL/8.0', '2011-09-20': u'PD/PD/LOP/7.0', 'user': u'sname', '2011-09-19': u'holiday/holiday/PL/8.0'},
 u'pname': {'2011-09-21': u'TS/TS/Ti/9.0', '2011-09-20': u'SMgr/TS/Mting/2.0', 'user': u'pname', '2011-09-19': u'TS/TS/O/9.0'}}

In General i need to get below output, but dict of dict print only date key value instead of of multiple key values on same date

Expected Output :

{u'sname': {'2011-09-21': u'holiday/holiday/PL/8.0', '2011-09-20': u'TS/TS/O/1.0', '2011-09-20': u'PD/PD/LOP/7.0', 'user': u'sname', '2011-09-19': u'holiday/holiday/PL/8.0'}, 
u'pname': {'2011-09-21': u'TS/TS/Trickle/9.0', '2011-09-20': u'TS/dmin/POC/2.5', '2011-09-20': u'SMgr/Smgr/PL/0.5', '2011-09-20': u'SMgr/TS/Mting/2.0' 'user': u'pname', '2011-09-19': u'TechSupport/TechSupport/O/9.0'}}

one i am using below below template tag for to hash the table

Template :

@register.filter
def hash(object, attr):
  gen_context = { 'object' : object }
  try:
    value = template.Variable('object.%s' % attr).resolve(gen_context)
  except template.VariableDoesNotExist:
    value = ' '
  return value

HTML :

<table>
   <thead>
   <th>S.No</th>
   <th>Name</th>
  {% for dates in week_dates %}
   <th>{{dates}}</th>
   {% endfor %}
  </thead>
    <tr>
{% for fetch in data.items %}
 <tr>
 <td>{{ forloop.counter }}</td>
 <td>{{ fetch.0 }}</td>
 {% for dates in week_dates %}
 <td>{{ fetch.1|hash:dates }}</td>
{% endfor %}                                          
 </tr>
 {% endfor %}
 </table>

Any help really appreciate it.

Please let me know if you need any more information.

Answer 1

As is explained in the tutorial AT LEAST ONCE, dictionary keys are unique. If you want to have multiple values for a key then you will have to fake it with a sequence.

{'foo': ['bar', 42]}