Organizing Transactions, Python 3

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#python 3.5.2
from collections import OrderedDict
import json;

def get_formatted_transactions(parents, partials):
	d = OrderedDict();

for index, partial in enumerate(partials):
		if parents[index] in d:
			l = d[parents[index]]
			l.append(partial)
			d[parents[index]] = l;
		else:
			d[parents[index]] = [partial]

return d;

def get_groups(transactions):
	i = 1;
	groups = OrderedDict();

while transactions:
		group_name = "group" + str(i);
		groups[group_name] = {};
		keys = list(transactions.keys());

for key in keys:
			if transactions[key]:
				groups[group_name][key] = transactions[key].pop(0);
				if not transactions[key]:
					del transactions[key];
			else:
				del transactions[key]
		i += 1;

return groups;

def get_comma_separated_data(groups):
	new_dict = OrderedDict();
	for group_name in groups:
		d = groups[group_name]
		new_dict[group_name] = ",".join([str(value) + key  for value, key in zip(d.values(), d.keys())])

return new_dict;

# Starting point
if __name__ == "__main__":
	partials = [1,2,3,4,5,6,7,8,9,10];
	parents = ['a','b','c','d','a','d','f','c','c','a'];

transactions = get_formatted_transactions(parents, partials);
	# Pretty pritining ordered dictionary
	print(json.dumps(transactions, indent=4));

print("\n");

# Creating groups to organize transactions
	groups = get_groups(transactions)
	# Pretty printing
	print(json.dumps(groups, indent=4))

print("\n");

# Get comma separated form 
	comma_separated_data = get_comma_separated_data(groups);
	# Pretty printing
	print(json.dumps(comma_separated_data, indent=4));

"""
		{
		    "a": [
		        1,
		        5,
		        10
		    ],
		    "b": [
		        2
		    ],
		    "c": [
		        3,
		        8,
		        9
		    ],
		    "d": [
		        4,
		        6
		    ],
		    "f": [
		        7
		    ]
		}
		
		{
		    "group1": {
		        "a": 1,
		        "b": 2,
		        "c": 3,
		        "d": 4,
		        "f": 7
		    },
		    "group2": {
		        "a": 5,
		        "c": 8,
		        "d": 6
		    },
		    "group3": {
		        "a": 10,
		        "c": 9
		    }
		}

{
		    "group1": "1a,2b,3c,4d,7f",
		    "group2": "5a,8c,6d",
		    "group3": "10a,9c"
		}
"""

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Absolute running time: 0.18 sec, cpu time: 0.16 sec, memory peak: 7 Mb, absolute service time: 0,19 sec