def Update(self):
"""
Update (recompute enriched pathways) the widget state.
"""
if not self.data:
return
self.error(0)
self.information(0)
# XXX: Check data in setData, do not even allow this to be executed if
# data has no genes
try:
genes = self.GeneNamesFromData(self.data)
except ValueError:
self.error(0, "Cannot extract gene names from input.")
genes = []
if not self.useAttrNames and any("," in gene for gene in genes):
genes = reduce(add, (split_and_strip(gene, ",")
for gene in genes),
[])
self.information(0,
"Separators detected in input gene names. "
"Assuming multiple genes per instance.")
self.queryGenes = genes
self.information(1)
reference = None
if self.useReference and self.refData:
reference = self.GeneNamesFromData(self.refData)
if not self.useAttrNames \
and any("," in gene for gene in reference):
reference = reduce(add, (split_and_strip(gene, ",")
for gene in reference),
[])
self.information(1,
"Separators detected in reference gene "
"names. Assuming multiple genes per "
"instance.")
org_code = self.SelectedOrganismCode()
from orangecontrib.bioinformatics.ncbi.gene import GeneMatcher
gm = GeneMatcher(kegg.to_taxid(org_code))
gm.genes = genes
gm.run_matcher()
mapped_genes = {gene: str(ncbi_id) for gene, ncbi_id in gm.map_input_to_ncbi().items()}
def run_enrichment(org_code, genes, reference=None, progress=None):
org = kegg.KEGGOrganism(org_code)
if reference is None:
reference = org.get_ncbi_ids()
# This is here just to keep widget working without any major changes.
# map not needed, geneMatcher will not work on widget level.
unique_genes = genes
unique_ref_genes = dict([(gene, gene) for gene in set(reference)])
taxid = kegg.to_taxid(org.org_code)
# Map the taxid back to standard 'common' taxids
# (as used by 'geneset') if applicable
r_tax_map = dict((v, k) for k, v in
kegg.KEGGGenome.TAXID_MAP.items())
if taxid in r_tax_map:
taxid = r_tax_map[taxid]
# We use the kegg pathway gene sets provided by 'geneset' for
# the enrichment calculation.
kegg_api = kegg.api.CachedKeggApi()
linkmap = kegg_api.link(org.org_code, "pathway")
converted_ids = kegg_api.conv(org.org_code, 'ncbi-geneid')
kegg_sets = relation_list_to_multimap(linkmap, dict((gene.upper(), ncbi.split(':')[-1])
for ncbi, gene in converted_ids))
kegg_sets = geneset.GeneSets(input=kegg_sets)
pathways = pathway_enrichment(
kegg_sets, unique_genes.values(),
unique_ref_genes.keys(),
callback=progress
)
# Ensure that pathway entries are pre-cached for later use in the
# list/tree view
kegg_pathways = kegg.KEGGPathways()
kegg_pathways.pre_cache(
pathways.keys(), progress_callback=progress
)
return pathways, org, unique_genes, unique_ref_genes
self.progressBarInit()
self.setEnabled(False)
self.infoLabel.setText("Retrieving...\n")
progress = concurrent.methodinvoke(self, "setProgress", (float,))
self._enrichTask = concurrent.Task(
function=lambda:
run_enrichment(org_code, mapped_genes, reference, progress)
)
self._enrichTask.finished.connect(self._onEnrichTaskFinished)
self._executor.submit(self._enrichTask)
class Annotations:
""" :class:`Annotations` object holds the annotations.
:param str organism:
an organism specifier (e.g. ``'9606'``). Annotations for that organism will be loaded.
:param ontology: :class:`Ontology` object for annotations
:type ontology: :class:`Ontology`
"""
def __init__(self, organism, ontology=None, progress_callback=None):
self.ontology = ontology
#: A dictionary mapping a gene (gene_id) to a set of all annotations of that gene.
self.gene_annotations = defaultdict(list)
#: A dictionary mapping a GO term id to a set of annotations that are directly annotated to that term
self.term_anotations = defaultdict(list)
self.all_annotations = defaultdict(list)
self._gene_names = None
self._gene_names_dict = None
self.gene_matcher = GeneMatcher(organism)
#: A list of all :class:`AnnotationRecords` instances.
self.annotations = []
self.header = ''
self.taxid = organism
self._ontology = None
try:
path = serverfiles.localpath_download(
DOMAIN,
FILENAME_ANNOTATION.format(organism),
progress_callback=progress_callback)
except FileNotFoundError:
raise taxonomy.UnknownSpeciesIdentifier(organism)
self._parse_file(path)
@property
def ontology(self):
return self._ontology
@ontology.setter
def ontology(self, ontology):
""" Set the ontology to use in the annotations mapping.
"""
self.all_annotations = defaultdict(list)
self._ontology = ontology
def _ensure_ontology(self):
if self.ontology is None:
self.ontology = Ontology()
def _parse_file(self, file_path):
with open(file_path, 'r') as anno_file:
self.header = anno_file.readline()
for line in anno_file.readlines():
self.add_annotation(AnnotationRecord.from_string(line))
def add_annotation(self, a):
""" Add a single :class:`AnotationRecord` instance to this object.
"""
if not isinstance(a, AnnotationRecord):
a = AnnotationRecord(a)
if not a.gene_id or not a.go_id or a.qualifier == 'NOT':
return
self.gene_annotations[int(a.gene_id)].append(a)
self.term_anotations[a.go_id].append(a)
self.annotations.append(a)
self.all_annotations = defaultdict(list)
def map_to_ncbi_id(self, genes):
""" Run gene name matching and return only known genes """
self.gene_matcher.genes = genes
self.gene_matcher.run_matcher()
if self.gene_matcher:
return {
input_gene: ncbi_id
for input_gene, ncbi_id in
self.gene_matcher.map_input_to_ncbi().items()
if self.gene_annotations[ncbi_id]
}
def map_from_ncbi_id(self):
if self.gene_matcher:
return {
ncbi_id: input_gene
for input_gene, ncbi_id in
self.gene_matcher.map_input_to_ncbi().items()
if self.gene_annotations[ncbi_id]
}
def _collect_annotations(self, go_id, visited):
""" Recursive function collects and caches all annotations for id
"""
if go_id not in self.all_annotations and go_id not in visited:
if go_id in self.ontology.reverse_alias_mapper:
annotations = [
self.term_anotations.get(alt_id, [])
for alt_id in self.ontology.reverse_alias_mapper[go_id]
] + [self.term_anotations[go_id]]
else:
annotations = [self.term_anotations[go_id]
] # annotations for this term alone
visited.add(go_id)
for typeId, child in self.ontology[go_id].related_to:
aa = self._collect_annotations(child, visited)
if type(aa) == set:
annotations.append(
aa) # if it was already reduced in get_all_annotations
else:
annotations.extend(aa)
self.all_annotations[go_id] = annotations
return self.all_annotations[go_id]
def get_annotations_by_go_id(self, go_id):
""" Return a set of all annotations (instances of :obj:`AnnotationRecord`)
for GO term `id` and all it's subterms.
Args:
go_id (:obj:`str`): GO term id
"""
self._ensure_ontology()
id = self.ontology.alias_mapper.get(go_id, go_id)
if id not in self.all_annotations or type(
self.all_annotations[id]) == list:
annot_set = set()
for annots in self._collect_annotations(id, set()):
annot_set.update(annots)
self.all_annotations[id] = annot_set
return self.all_annotations[id]
def get_genes_by_go_term(self, go_id, evidence_codes=None):
""" Return a list of genes annotated by specified `evidence_codes`
to GO term 'id' and all it's subterms."
:param str go_id: GO term id
:param list-of-strings evidence_codes:
List of evidence codes to consider when matching annotations
to terms.
"""
evidence_codes = set(evidence_codes or evidenceDict.keys())
annotations = self.get_annotations_by_go_id(go_id)
return list(
set([
int(ann.gene_id) for ann in annotations
if ann.evidence in evidence_codes
]))
def genes(self):
return set([int(ann.gene_id) for ann in self.annotations])
def get_enriched_terms(self,
genes,
reference=None,
evidence_codes=None,
slims_only=False,
aspect=None,
prob=statistics.Binomial(),
use_fdr=True,
progress_callback=None):
""" Return a dictionary of enriched terms, with tuples of
(list_of_genes, p_value, reference_count) for items and term
ids as keys. P-Values are FDR adjusted if use_fdr is True (default).
Args:
genes: List of genes
reference: List of genes (if None all genes included in the annotations will be used).
evidence_codes: List of evidence codes to consider.
slims_only: If `True` return only slim terms.
aspect: Which aspects to use. Use all by default;
one of Process (biological process),
Function (molecular function) or
Component (cellular component)
prob:
use_fdr:
progress_callback:
"""
all_genes = set(genes)
if not reference:
reference = all_genes
if aspect is None:
aspects_set = {'Process', 'Component', 'Function'}
elif isinstance(aspect, str):
aspects_set = {aspect}
else:
aspects_set = aspect
evidence_codes = set(evidence_codes or evidenceDict.keys())
annotations = [
ann for gene in genes for ann in self.gene_annotations[gene]
if ann.evidence in evidence_codes and ann.aspect in aspects_set
]
ref_annotations = set([
ann for gene in reference for ann in self.gene_annotations[gene]
if ann.evidence in evidence_codes and ann.aspect in aspects_set
])
annotations_dict = defaultdict(set)
for ann in annotations:
annotations_dict[ann.go_id].add(ann)
self._ensure_ontology()
if slims_only and not self.ontology.slims_subset:
warnings.warn(
"Unspecified slims subset in the ontology! "
"Using 'goslim_generic' subset", UserWarning)
self.ontology.set_slims_subset('goslim_generic')
terms = annotations_dict.keys()
filtered_terms = [term for term in terms if term in self.ontology]
if len(terms) != len(filtered_terms):
term_diff = set(terms) - set(filtered_terms)
warnings.warn(
"%s terms in the annotations were not found in the "
"ontology." % ",".join(map(repr, term_diff)), UserWarning)
terms = self.ontology.extract_super_graph(filtered_terms)
res = {}
milestones = progress_bar_milestones(len(terms), 100)
unmatch = self.map_from_ncbi_id()
for i, term in enumerate(terms):
if slims_only and term not in self.ontology.slims_subset:
continue
all_annotations = self.get_annotations_by_go_id(term).intersection(
ref_annotations)
all_annotated_genes = set(
[int(ann.gene_id) for ann in all_annotations])
mapped_genes = all_genes.intersection(all_annotated_genes)
if len(reference) > len(all_annotated_genes):
mapped_reference_genes = reference.intersection(
all_annotated_genes)
else:
mapped_reference_genes = all_annotated_genes.intersection(
reference)
res[term] = ([unmatch[gene] for gene in mapped_genes],
prob.p_value(len(mapped_genes), len(reference),
len(mapped_reference_genes),
len(genes)), len(mapped_reference_genes))
if progress_callback and i in milestones:
progress_callback(100.0 * i / len(terms))
if use_fdr:
res = sorted(res.items(), key=lambda x: x[1][1])
res = dict([(id, (genes, p, ref))
for (id, (genes, _, ref)), p in zip(
res, statistics.FDR([p for _, (_, p, _) in res]))])
return res
def get_annotated_terms(self,
genes,
direct_annotation_only=False,
evidence_codes=None,
progress_callback=None):
""" Return all terms that are annotated by genes with evidence_codes.
"""
genes = [genes] if type(genes) == str else genes
match = self.map_to_ncbi_id(genes)
unmatch = self.map_from_ncbi_id()
genes = set([match[gene] for gene in genes])
evidence_codes = set(evidence_codes or evidenceDict.keys())
annotations = [
ann for gene in genes for ann in self.gene_annotations[gene]
if ann.evidence in evidence_codes
]
dd = defaultdict(set)
for ann in annotations:
dd[ann.go_id].add(unmatch[int(ann.gene_id)])
if not direct_annotation_only:
self._ensure_ontology()
terms = dd.keys()
filtered_terms = [term for term in terms if term in self.ontology]
if len(terms) != len(filtered_terms):
term_diff = set(terms) - set(filtered_terms)
warnings.warn(
"%s terms in the annotations were not found in the "
"ontology." % ",".join(map(repr, term_diff)), UserWarning)
terms = self.ontology.extract_super_graph(filtered_terms)
for i, term in enumerate(terms):
term_annotations = self.get_annotations_by_go_id(
term).intersection(annotations)
dd[term].update(
[unmatch[int(ann.gene_id)] for ann in term_annotations])
return dict(dd)
def __add__(self, iterable):
""" Return a new Annotations object with combined annotations
"""
return Annotations([a for a in self] + [a for a in iterable],
ontology=self.ontology)
def __iadd__(self, iterable):
""" Add annotations to this instance
"""
self.extend(iterable)
return self
def __contains__(self, item):
return item in self.annotations
def __iter__(self):
""" Iterate over all AnnotationRecord objects in annotations
"""
return iter(self.annotations)
def __len__(self):
""" Return the number of annotations
"""
return len(self.annotations)
def __getitem__(self, index):
""" Return the i-th annotation record
"""
return self.annotations[index]
def __getslice__(self, *args):
return self.annotations.__getslice__(*args)
def add(self, line):
""" Add one annotation
"""
self.add_annotation(line)
def append(self, line):
""" Add one annotation
"""
self.add_annotation(line)
def extend(self, lines):
""" Add multiple annotations
"""
for line in lines:
self.add_annotation(line)
