Source code for spinn_front_end_common.interface.interface_functions.provenance_json_writer
# general imports
import os
import itertools
import json
import string
[docs]class ProvenanceJSONWriter(object):
""" Write provenance data into JSON
"""
__slots__ = []
VALID_CHARS = frozenset(
"-_.() {}{}".format(string.ascii_letters, string.digits))
def __call__(self, provenance_data_items, provenance_data_path):
# Group data by the first name
items = sorted(provenance_data_items, key=lambda item: item.names[0])
for name, group in itertools.groupby(
items, lambda item: item.names[0]):
filename = "".join(
c if c in self.VALID_CHARS else '_' for c in name)
# generate file path for xml
file_path = os.path.join(
provenance_data_path, "{}.json".format(filename))
count = 2
while os.path.exists(file_path):
file_path = os.path.join(
provenance_data_path, "{}_{}.json".format(filename, count))
count += 1
# Create a root node
root = dict()
# Go through the items and add them
for item in group:
# Add the "categories" for the item (any name between the first
# and last)
super_element = root
for cat_name in item.names[1:-1]:
if (cat_name in super_element and
isinstance(super_element[cat_name], dict)):
# If there is already a category of this name under the
# super element, use it
super_element = super_element[cat_name]
else:
# Otherwise, create a new category under the super
# element
super_element[cat_name] = dict()
super_element = super_element[cat_name]
# Add the item
super_element[item.names[-1]] = str(item.value)
# write json form into file provided
writer = open(file_path, "w")
json.dump(root, writer, indent=4, separators=(',', ': '))
writer.flush()
writer.close()