Source code for spinn_front_end_common.interface.interface_functions.provenance_xml_writer
from spinn_front_end_common.utilities.helpful_functions \
import generate_unique_folder_name
# general imports
from lxml import etree
import itertools
import string
[docs]class ProvenanceXMLWriter(object):
""" Write provenance data into XML
"""
__slots__ = []
VALID_CHARS = frozenset(
"-_.() {}{}".format(string.ascii_letters, string.digits))
def __call__(self, provenance_data_items, provenance_data_path):
""" writes provenance in xml format
:param provenance_data_items: data items for provenance
:param provenance_data_path: the file path to store provenance in
:return: None
"""
# 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 = generate_unique_folder_name(
provenance_data_path, filename, ".xml")
# Create a root node
root = etree.Element("provenance_data_items", name=name)
# Keep track of sub-categories
categories = {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
cats = categories[root]
for cat_name in item.names[1:-1]:
if cat_name in cats:
# If there is already a category of this name under the
# super element, use it
super_element = cats[cat_name]
else:
# Otherwise, create a new category under the super
# element
super_element = etree.SubElement(
super_element, "provenance_data_items",
name=cat_name)
cats[cat_name] = super_element
categories[super_element] = dict()
# Get the next category for the next run of the loop
cats = categories[super_element]
# Add the item
element = etree.SubElement(
super_element, "provenance_data_item",
name=item.names[-1])
element.text = str(item.value)
# write xml form into file provided
with open(file_path, "w") as writer:
writer.write(etree.tostring(root, pretty_print=True))