def fromFile(cls, inputFileName, taxons = None, dataset = None):
"""Decides file type and reads relevant data."""
debug("Reading gene associations file %s...%s" % (inputFileName, ("" if dataset is None else " Dataset size is %d." % len(dataset))))
#open = gzip.open if inputFileName.endswith(".gz") else __builtins__.open
if inputFileName.endswith('.pickle') or inputFileName.endswith('.pickle_reserved'):
# Serialized data = much faster
with open(inputFileName, 'rb') as f:
associations, alltaxons = pickle.load(f)
else:
associations = defaultdict(set)
alltaxons = set()
with open(inputFileName, 'rb') as associationFile:
for line in associationFile.read().decode('utf8').splitlines():
if line.startswith('!'): continue
line = line.split('\t')
taxon = {int(x.split(':')[1]) for x in line[12].split('|')}
alltaxons.update(taxon)
gene = Gene.canonicalName(line[2])
term = line[4]
if (taxons is None or taxons.intersection(taxon)) and \
(dataset is None or gene in dataset):
associations[term].add(gene)
debug("Finished reading gene associations file %s... " % inputFileName)
#if dataset is not None:
# d = dataset.difference(allgenes)
# if d:
# debug("Missing genes: %s!!!" % ", ".join(d))
return cls(associations, alltaxons, dataset)
def serialize(self, fName):
"""Serializes data to a file = faster future use."""
debug("Serializing gene associations to file %s..." % fName)
data = (self.associations, self.alltaxons)
with open(fName, 'wb') as f:
pickle.dump(data, f)
debug("Finished serializing gene associations to file %s..." % fName)
def serialize(self, fName):
"""Serializes data to a file = faster future use."""
debug("Serializing gene associations to file %s..." % fName)
data = (self.associations, self.alltaxons)
with open(fName, 'wb') as f:
pickle.dump(data, f)
debug("Finished serializing gene associations to file %s..." % fName)
def dotExport(self):
""" Export as a graph to the DOT format for graphical presentation."""
debug("Exporting ontology to dot.")
def nodename(t): return t.replace(":", "")
for direction in ("parents", "children"):
dotFile = self.inputFileName.parent / (self.inputFileName.stem +"_"+direction+ '.dot')
with dotFile.open('w') as output:
print("digraph ontology {", file=output)
print('overlap="false";', file=output)
print('root="%s";' % nodename(self.root), file=output)
for term, props in self.ontology.items():
name = props['name']
if not name:
continue
if ',' in name:
name = name.replace(', ', r',\n')
else:
name = name.replace('binding', r'\nbinding').replace('activity',r'\nactivity').replace(r' \n',r'\n')
print('%s [fontsize=8,label="%s"]' % (nodename(term), name), file=output)
for term, props in self.ontology.items():
for related in props[direction]:
print('%s -> %s' % (nodename(term), nodename(related)), file=output)
print("}", file=output)
for fmt in ('ps', 'png'):
outFile = dotFile.parent / (dotFile.stem + '.' + fmt)
#print(" ".join(['dot', '-T'+fmt, str(dotFile), '-o', str(outFile)]))
try:
subprocess.Popen(['dot', '-T'+fmt, str(dotFile), '-o', str(outFile).replace(".","_dot.")])
subprocess.Popen(['twopi', '-T'+fmt, str(dotFile), '-o', str(outFile).replace(".","_twopi.")])
except IOError:
pass
debug("Finished dot export.")
def fromFile(cls, inputFileName, taxons=None, dataset=None):
"""Decides file type and reads relevant data."""
debug("Reading gene associations file %s...%s" %
(inputFileName,
("" if dataset is None else " Dataset size is %d." %
len(dataset))))
#open = gzip.open if inputFileName.endswith(".gz") else __builtins__.open
if inputFileName.endswith('.pickle') or inputFileName.endswith(
'.pickle_reserved'):
# Serialized data = much faster
with open(inputFileName, 'rb') as f:
associations, alltaxons = pickle.load(f)
else:
associations = defaultdict(set)
alltaxons = set()
with open(inputFileName, 'rb') as associationFile:
for line in associationFile.read().decode('utf8').splitlines():
if line.startswith('!'): continue
line = line.split('\t')
taxon = {int(x.split(':')[1]) for x in line[12].split('|')}
alltaxons.update(taxon)
gene = Gene.canonicalName(line[2])
term = line[4]
if (taxons is None or taxons.intersection(taxon)) and \
(dataset is None or gene in dataset):
associations[term].add(gene)
debug("Finished reading gene associations file %s... " % inputFileName)
#if dataset is not None:
# d = dataset.difference(allgenes)
# if d:
# debug("Missing genes: %s!!!" % ", ".join(d))
return cls(associations, alltaxons, dataset)
def completeTest(self, treelikerArgs, processes=1):
self.generateExamplesUnified()
bestClassifiers = []
terms = self.termsByDepth(
) # This sorting is needed later in bnet learning
treeliker = TreeLikerWrapper(self, *treelikerArgs)
def processTerm(term):
return term, treeliker.runTermTest(term)
nets = defaultdict(dict)
allresults = tuple(parallel_map_dill(processes, processTerm, terms))
combis = set()
for term, learned in allresults:
for clfName, i in learned:
combis.add((term, clfName))
#for clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation in folds:
if clfName in nets[i]:
net = nets[i][clfName]
else:
net = BayesNet(i, clfName, self)
nets[i][clfName] = net
net.generateCPD(
term
) #, clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation)
for i, byClf in sorted(nets.items()):
for clfName, net in byClf.items():
net.bake()
net.predict()
debug("Generating plots.")
#for term, learned in allresults:
# for clfName, folds in learned.items():
plt.figure(figsize=(6, 12))
for term, clfName in combis:
plt.clf()
termN = self[term]['name']
cvdir = getTermPath(termN)
#folds2 = [(nets[i][clfName].nodeAsClf(term),)+f[1:] for i,f in enumerate(folds)]
s1 = plt.subplot(211, adjustable='box', aspect=1)
s1.axis('equal')
#s1.legend(loc='center left', bbox_to_anchor=(1, 0.5))
plotRoc(termN, clfName, termN)
s2 = plt.subplot(212, adjustable='box', aspect=1)
s2.axis('equal')
#s2.legend(loc='center left', bbox_to_anchor=(1, 0.5))
plotRoc(termN,
clfName,
"Bayes correction",
clfs=(nets[i][clfName].nodeAsClf(term)
for i in range(NUM_FOLDS)))
#plotRoc("Bayes correction", folds2)
print(str(cvdir / (clfName.replace(" ", "_") + '_roc.png')))
plt.savefig(str(cvdir / (clfName.replace(" ", "_") + '_roc.png')))
plt.savefig(str(cvdir / (clfName.replace(" ", "_") + '_roc.ps')))
debug("Finished complete test.")
def completeTest(self, treelikerArgs, processes = 1):
self.generateExamplesUnified()
bestClassifiers = []
terms = self.termsByDepth() # This sorting is needed later in bnet learning
treeliker = TreeLikerWrapper(self, *treelikerArgs)
def processTerm(term):
return term, treeliker.runTermTest(term)
nets = defaultdict(dict)
allresults = tuple(parallel_map_dill(processes, processTerm, terms))
combis = set()
for term, learned in allresults:
for clfName, i in learned:
combis.add((term,clfName))
#for clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation in folds:
if clfName in nets[i]:
net = nets[i][clfName]
else:
net = BayesNet(i, clfName, self)
nets[i][clfName] = net
net.generateCPD(term)#, clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation)
for i, byClf in sorted(nets.items()):
for clfName, net in byClf.items():
net.bake()
net.predict()
debug("Generating plots.")
#for term, learned in allresults:
# for clfName, folds in learned.items():
plt.figure(figsize = (6,12))
for term,clfName in combis:
plt.clf()
termN = self[term]['name']
cvdir = getTermPath(termN)
#folds2 = [(nets[i][clfName].nodeAsClf(term),)+f[1:] for i,f in enumerate(folds)]
s1 = plt.subplot(211, adjustable='box', aspect=1)
s1.axis('equal')
#s1.legend(loc='center left', bbox_to_anchor=(1, 0.5))
plotRoc(termN, clfName, termN)
s2 = plt.subplot(212, adjustable='box', aspect=1)
s2.axis('equal')
#s2.legend(loc='center left', bbox_to_anchor=(1, 0.5))
plotRoc(termN, clfName, "Bayes correction",
clfs = (nets[i][clfName].nodeAsClf(term) for i in range(NUM_FOLDS) ))
#plotRoc("Bayes correction", folds2)
print(str(cvdir/(clfName.replace(" ","_")+'_roc.png')))
plt.savefig(str(cvdir/(clfName.replace(" ","_")+'_roc.png')))
plt.savefig(str(cvdir/(clfName.replace(" ","_")+'_roc.ps')))
debug("Finished complete test.")
def __init__(self, inputFileName, namespace='molecular_function'):
"""Constructor, reads and parses the ontology OBO file."""
debug("Reading ontology file %s... " % inputFileName)
self.root = None
self.namespace = namespace
ontology = defaultdict(lambda: defaultdict(list))
self.inputFileName = Path(inputFileName)
with self.inputFileName.open() as go:
terms = groupby(go.read().splitlines(), lambda x: x != '')
for b, term in terms:
term = list(term)
if not b or term[0] != '[Term]': continue
nonlists = ('id', 'def', 'name', 'namespace', 'is_obsolete')
# Do some deciphering here...
term = defaultdict(
list,
[(a, [y[1]
for y in b][0 if a in nonlists else slice(None)])
for a, b in groupby([x.split(': ', 1)
for x in term[1:]], lambda x: x[0])])
# Filter terms by namespace, discard obsolete terms
if term['namespace'] != namespace or term[
'is_obsolete'] == 'true':
continue
# Decide root node
if term['name'] == namespace:
assert self.root is None
self.root = term['id']
# Save the term to ontology
ontology[term['id']]['name'] = term['name'].replace(
'_', ' ') # FIXME KDYBY BLBLO, ODEBRAT replace
for ref in term['is_a']:
refid, refname = ref.split(' ! ')
ontology[refid]['children'].append(term['id'])
ontology[term['id']]['parents'].append(refid)
# This is used by Bayes nets
ontology[term['id']]['node'] = defaultdict(
dict) # fold : clfName : node
ontology[term['id']]['clf'] = defaultdict(
dict) # fold : clfName : Classifier
self.ontology = {**ontology}
self.associations = None
self.geneFactory = GeneFactory()
debug("Initialized ontology for file %s... " % inputFileName)
def _runTreeLiker(self, resultPath, batchPath):
if not rerun and (resultPath / '0' / 'test.arff.bz2').is_file():
return
cmd = ["java", "-cp", self.treeliker, "ida.ilp.treeLiker.TreeLikerMain", "-batch", batchPath.name]
if self.maxMemory is not None:
cmd.insert(1, '-Xmx'+self.maxMemory)
debug("Starting treeliker for "+resultPath.name)
if not resultPath.is_dir():
resultPath.mkdir()
with subprocess.Popen(cmd, stdout = subprocess.PIPE, bufsize = 1, universal_newlines=True, cwd=str(resultPath)) as treelikerProc:
prev = 0
i = 1
for _line in treelikerProc.stdout:
line = '\r%d : %s' % (i, _line.rstrip())
if _line.startswith('Fold') and dp.utils.verbosity == 1:
debug("%s: %s" % (batchPath.name, _line))
elif dp.utils.verbosity >= 2:
#debug(line.ljust(prev), end=_line.startswith('Fold'))
debug(_line.strip())
prev = len(line)
if _line.startswith('Processing'):
i+=1
if dp.utils.verbosity >= 2:
sys.stderr.write("\n")
debug("Finished treeliker for "+resultPath.name)
def _runTreeLiker(self, resultPath, batchPath):
if not rerun and (resultPath / '0' / 'test.arff.bz2').is_file():
return
cmd = [
"java", "-cp", self.treeliker, "ida.ilp.treeLiker.TreeLikerMain",
"-batch", batchPath.name
]
if self.maxMemory is not None:
cmd.insert(1, '-Xmx' + self.maxMemory)
debug("Starting treeliker for " + resultPath.name)
if not resultPath.is_dir():
resultPath.mkdir()
with subprocess.Popen(cmd,
stdout=subprocess.PIPE,
bufsize=1,
universal_newlines=True,
cwd=str(resultPath)) as treelikerProc:
prev = 0
i = 1
for _line in treelikerProc.stdout:
line = '\r%d : %s' % (i, _line.rstrip())
if _line.startswith('Fold') and dp.utils.verbosity == 1:
debug("%s: %s" % (batchPath.name, _line))
elif dp.utils.verbosity >= 2:
#debug(line.ljust(prev), end=_line.startswith('Fold'))
debug(_line.strip())
prev = len(line)
if _line.startswith('Processing'):
i += 1
if dp.utils.verbosity >= 2:
sys.stderr.write("\n")
debug("Finished treeliker for " + resultPath.name)
def dotExport(self):
""" Export as a graph to the DOT format for graphical presentation."""
debug("Exporting ontology to dot.")
def nodename(t):
return t.replace(":", "")
for direction in ("parents", "children"):
dotFile = self.inputFileName.parent / (self.inputFileName.stem +
"_" + direction + '.dot')
with dotFile.open('w') as output:
print("digraph ontology {", file=output)
print('overlap="false";', file=output)
print('root="%s";' % nodename(self.root), file=output)
for term, props in self.ontology.items():
name = props['name']
if not name:
continue
if ',' in name:
name = name.replace(', ', r',\n')
else:
name = name.replace('binding', r'\nbinding').replace(
'activity', r'\nactivity').replace(r' \n', r'\n')
print('%s [fontsize=8,label="%s"]' %
(nodename(term), name),
file=output)
for term, props in self.ontology.items():
for related in props[direction]:
print('%s -> %s' % (nodename(term), nodename(related)),
file=output)
print("}", file=output)
for fmt in ('ps', 'png'):
outFile = dotFile.parent / (dotFile.stem + '.' + fmt)
#print(" ".join(['dot', '-T'+fmt, str(dotFile), '-o', str(outFile)]))
try:
subprocess.Popen([
'dot', '-T' + fmt,
str(dotFile), '-o',
str(outFile).replace(".", "_dot.")
])
subprocess.Popen([
'twopi', '-T' + fmt,
str(dotFile), '-o',
str(outFile).replace(".", "_twopi.")
])
except IOError:
pass
debug("Finished dot export.")
def runTermTest(self, term):
term = self.ontology[term]['name']
debug("Preparing for TreeLiker on term %s." % term)
resultPath = getTermPath(term)
batchPath = resultPath / 'batch.treeliker'
datasetPath = resultPath / 'dataset.txt'
batchFile = "set(algorithm, relf_grounding_counting)\n" \
"set(verbosity, %d)\n" \
"set(output_type, train_test)\n" \
"set(examples, '%s')\n" \
"set(template, [%s])\n" \
"set(use_sampling, true)\n" \
"set(num_samples, %d)\n" \
"set(sample_size, %d)\n" \
"set(covered_class, '%s')\n\n" % (
dp.utils.verbosity,
datasetPath.name,
self.template,
self.samples,
self.sample_size,
term)
with datasetPath.open() as ds:
dataSetLen = len([*ds]) # Counts lines
for i, (train, test) in enumerate(
cross_validation.KFold(dataSetLen, NUM_FOLDS)):
path = resultPath / str(i)
if not path.is_dir():
path.mkdir()
batchFile += "set(output, '%s')\n" \
"set(train_set, [%s])\n" \
"set(test_set, [%s])\n" \
"work(yes)\n" % (
path.name,
",".join(map(str,train)),
",".join(map(str,test)))
with batchPath.open('w') as bf:
bf.write(batchFile)
self._runTreeLiker(resultPath, batchPath)
return learningTest(resultPath)
def runTermTest(self, term):
term = self.ontology[term]['name']
debug("Preparing for TreeLiker on term %s." % term)
resultPath = getTermPath(term)
batchPath = resultPath / 'batch.treeliker'
datasetPath = resultPath / 'dataset.txt'
batchFile = "set(algorithm, relf_grounding_counting)\n" \
"set(verbosity, %d)\n" \
"set(output_type, train_test)\n" \
"set(examples, '%s')\n" \
"set(template, [%s])\n" \
"set(use_sampling, true)\n" \
"set(num_samples, %d)\n" \
"set(sample_size, %d)\n" \
"set(covered_class, '%s')\n\n" % (
dp.utils.verbosity,
datasetPath.name,
self.template,
self.samples,
self.sample_size,
term)
with datasetPath.open() as ds:
dataSetLen = len([*ds]) # Counts lines
for i, (train, test) in enumerate(cross_validation.KFold(dataSetLen, NUM_FOLDS)):
path = resultPath / str(i)
if not path.is_dir():
path.mkdir()
batchFile += "set(output, '%s')\n" \
"set(train_set, [%s])\n" \
"set(test_set, [%s])\n" \
"work(yes)\n" % (
path.name,
",".join(map(str,train)),
",".join(map(str,test)))
with batchPath.open('w') as bf:
bf.write(batchFile)
self._runTreeLiker(resultPath, batchPath)
return learningTest(resultPath)
def shrink(self, toSize, minTermAssociations):
random.seed(0)
debug("Shrinking associations")
allgenes = sorted(self.associations[self.ontology.root])
size = len(allgenes)
while size > toSize:
todel = random.choice(allgenes)
allgenes.remove(todel)
self.delgene(todel)
self.ontology.deleteSmallTerms(minTermAssociations)
allgenes = sorted(self.associations[self.ontology.root])
size = len(allgenes)
self.ontology.genes = allgenes
debug("Finished shrinking associations. Left with %d genes." % (size))
def shrink(self, toSize, minTermAssociations):
random.seed(0)
debug("Shrinking associations")
allgenes = sorted(self.associations[self.ontology.root])
size = len(allgenes)
while size > toSize:
todel = random.choice(allgenes)
allgenes.remove(todel)
self.delgene(todel)
self.ontology.deleteSmallTerms(minTermAssociations)
allgenes = sorted(self.associations[self.ontology.root])
size = len(allgenes)
self.ontology.genes = allgenes
debug("Finished shrinking associations. Left with %d genes." % (size))
def __init__(self, inputFileName, namespace = 'molecular_function'):
"""Constructor, reads and parses the ontology OBO file."""
debug("Reading ontology file %s... " % inputFileName)
self.root = None
self.namespace = namespace
ontology = defaultdict(lambda: defaultdict(list))
self.inputFileName = Path(inputFileName)
with self.inputFileName.open() as go:
terms = groupby(go.read().splitlines(), lambda x: x != '')
for b, term in terms:
term = list(term)
if not b or term[0] != '[Term]': continue
nonlists = ('id', 'def', 'name', 'namespace', 'is_obsolete')
# Do some deciphering here...
term = defaultdict(list, [
(a, [y[1] for y in b][0 if a in nonlists else slice(None)])
for a,b in groupby(
[x.split(': ', 1) for x in term[1:]],
lambda x: x[0])])
# Filter terms by namespace, discard obsolete terms
if term['namespace'] != namespace or term['is_obsolete'] == 'true':
continue
# Decide root node
if term['name'] == namespace:
assert self.root is None
self.root = term['id']
# Save the term to ontology
ontology[term['id']]['name'] = term['name'].replace('_', ' ') # FIXME KDYBY BLBLO, ODEBRAT replace
for ref in term['is_a']:
refid, refname = ref.split(' ! ')
ontology[refid]['children'].append(term['id'])
ontology[term['id']]['parents'].append(refid)
# This is used by Bayes nets
ontology[term['id']]['node'] = defaultdict(dict) # fold : clfName : node
ontology[term['id']]['clf'] = defaultdict(dict) # fold : clfName : Classifier
self.ontology = {**ontology}
self.associations = None
self.geneFactory = GeneFactory()
debug("Initialized ontology for file %s... " % inputFileName)
def generateExamplesUnified(self):
#return
debug("Generating unified datasets.")
terms = self.termsByDepth(False)
#rootname = self.ontology[self.root]['name']
with ExitStack() as stack: # Closes all files when exited
files = [(term, stack.enter_context((getTermPath(term) / 'dataset.txt').open('w')))
for term
in (self[t]['name'] for t in self.ontology.keys())
]#if term != rootname]
#for i, geneName in enumerate(self.genes):
for geneName in self.genes:
#debug("%d. Writing gene %s." % (i, geneName))
gene = self.geneFactory.getGene(geneName)
repg = ", ".join(gene.logicalRepresentation())
for term, output in files:
if geneName not in self.associations[term]:
term = '~'+term
e = '"%s" %s' % (term, repg)
print(e, file=output)
def getSecStr(self):
name, strand = self.name.split("_")
name = name.upper()
try:
s = tuple([MAPPING[a] for a in self.ss["%s:%s:sequence" % (name, strand)]])
if s != self.sequence:
debug("WARNING: Different sequences for %s" % (self.name,))
debug(str(s))
debug(str(self.sequence))
self.secstr = self.ss["%s:%s:secstr" % (name, strand)]
except KeyError:
debug("WARNING: missing secondary structure info %s" % (self.name,))
self.secstr = None
self.dump()
def generateExamplesUnified(self):
#return
debug("Generating unified datasets.")
terms = self.termsByDepth(False)
#rootname = self.ontology[self.root]['name']
with ExitStack() as stack: # Closes all files when exited
files = [
(term,
stack.enter_context(
(getTermPath(term) / 'dataset.txt').open('w')))
for term in (self[t]['name'] for t in self.ontology.keys())
] #if term != rootname]
#for i, geneName in enumerate(self.genes):
for geneName in self.genes:
#debug("%d. Writing gene %s." % (i, geneName))
gene = self.geneFactory.getGene(geneName)
repg = ", ".join(gene.logicalRepresentation())
for term, output in files:
if geneName not in self.associations[term]:
term = '~' + term
e = '"%s" %s' % (term, repg)
print(e, file=output)
def getSecStr(self):
name, strand = self.name.split("_")
name = name.upper()
try:
s = tuple([
MAPPING[a] for a in self.ss["%s:%s:sequence" % (name, strand)]
])
if s != self.sequence:
debug("WARNING: Different sequences for %s" % (self.name, ))
debug(str(s))
debug(str(self.sequence))
self.secstr = self.ss["%s:%s:secstr" % (name, strand)]
except KeyError:
debug("WARNING: missing secondary structure info %s" %
(self.name, ))
self.secstr = None
self.dump()
def fromXML(cls, fullName):
"""Generates protein data from stored XML file. Downloads it if not present."""
name = Gene.canonicalName(fullName, False)
fname = cls.xmlname(name)
sequence = []
structure = defaultdict(
dict) # structure[seq_id][seq_position] == coordinates
sequences = defaultdict(dict)
strand2seq = {}
# Download data if not stored on disc
if not fname.is_file():
debug("Downloading file for gene %s... " % name, False)
req = Request(
cls.XML_URL % name,
headers={
'User-Agent':
'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'
})
with fname.open('wb') as f:
f.write(urlopen(req).read())
#debug("Done.")
# Parse the file
debug("Parsing XML for gene %s... " % name)
tag_stack = []
elem_stack = []
pp_seq_id = None
with gzip.open(str(fname), 'r') as f:
#fcntl.lockf(f.fileno(), fcntl.LOCK_EX)
doc = ElementTree.iterparse(f, ('start', 'end'))
#next(doc) # Skip root element
_, root = next(doc)
XMLNS = root.tag[:root.tag.find("}") + 1]
path_atom = [XMLNS + 'atom_siteCategory', XMLNS + 'atom_site']
path_seq = [
XMLNS + 'entity_poly_seqCategory', XMLNS + 'entity_poly_seq'
]
path_poly = [XMLNS + 'entity_polyCategory', XMLNS + 'entity_poly']
whitespace = re.compile(r'\s+')
for event, elem in doc:
if event == 'start':
tag_stack.append(elem.tag)
elem_stack.append(elem)
elif event == 'end':
if tag_stack == path_atom:
# elem[11] = <PDBx:label_atom_id>, elem[5] = <PDBx:auth_atom_id>
if elem[11].text == 'CA' and elem[5].text == 'CA':
# elem[13] = <PDBx:label_entity_id>
seq_id = elem[13].text
# elem[14] = <PDBx:label_seq_id>, elem[{1,2,3}] = <PDBx:Cartn_{xyz}>
label_seq_id = elem[14].text
if label_seq_id is not None:
coordinates = [
float(elem[i].text) for i in (1, 2, 3)
]
seq_pos = int(elem[14].text) - 1
structure[seq_id][seq_pos] = tuple(coordinates)
elem_stack[-2].remove(elem)
elif tag_stack == path_poly:
seq_type = elem.find(XMLNS + 'type').text
if seq_type.startswith(
'polypeptide'): # elem[5] = <PDBx:type>
seq = elem.find(
XMLNS + 'pdbx_seq_one_letter_code_can').text
sequence = [
MAPPING[c]
for c in re.sub(whitespace, '', seq)
]
seq_id = elem.attrib['entity_id']
strand_ids = elem.find(XMLNS +
'pdbx_strand_id').text
strand2seq.update({
strand_id: seq_id
for strand_id in strand_ids.split(',')
})
sequences[seq_id] = sequence
elem_stack[-2].remove(elem)
#elif tag_stack == path_seq:
# entity_id="1" shoud be the polypeptide sequence, I hope, but I'm not sure. FIXME
# There can also be e.g. polynucleotide sequences
# if elem.attrib['entity_id'] == '1':
# sequence.append(elem.attrib['mon_id'].lower())
# elem_stack[-2].remove(elem)
if tag_stack: tag_stack.pop()
if elem_stack: elem_stack.pop()
#atomQuery = "./%satom_siteCategory/%satom_site[%slabel_atom_id='N'][%sauth_atom_id='N'][%slabel_entity_id='1']" % ((XMLNS,) * 5)
#seqQuery = "./%sentity_poly_seqCategory/%sentity_poly_seq[@entity_id='1']" % ((XMLNS,) * 2)
#debug("Done.")
for strand, seq in strand2seq.items():
yield cls(name + '_' + strand, tuple(sequences[seq]),
tuple(structure[seq].items()))
def learningTest(cvdir):
debug("Starting learning in node %s." % cvdir.name)
clasfifiers = (
#TOOD, use third dict for params
#("Bagged SVM", lambda: BaggingClassifier(SVC(C=0.1,probability=True))),
#("LabelPropagation RBF", LabelPropagation),
#("LabelSpreading RBF", LabelSpreading),
#("LabelSpreading-7nn", lambda: LabelSpreading(kernel='knn')),
#("LabelPropagation-7nn", lambda: LabelPropagation(kernel='knn')),
#!("AdaBoost-DecisionTree", AdaBoostClassifier),
#("5-NN", lambda: KNeighborsClassifier(p=1, algorithm='kd_tree')),
#!("Random Forest", RandomForestClassifier),
#("SGD", lambda: SGDClassifier(n_iter=100,alpha=0.01,loss="modified_huber")),
("RBF SVM C=1",
lambda: SVC(shrinking=False, tol=1e-5, probability=True)),
#("RBF SVM C=0.5", lambda : SVC(C=0.1,probability=True)),
#("RBF SVM C=2", lambda : SVC(C=10,probability=True)),
#("RBF SVM C=inf", lambda : SVC(C=numpy.inf,probability=True)),
#("Linear SVM C=1", lambda: SVC(kernel='linear',probability=True)),
#("Quadratic SVM C=1", lambda: SVC(kernel='poly', degree=2,probability=True)),
#("Cubic SVM C=1", lambda: SVC(kernel='poly', degree=3,probability=True)),
)
scaler = StandardScaler(copy=False)
with (cvdir / 'scores.txt').open('w') as output:
print('Cross Validation results for file term %s:' % cvdir.name,
file=output)
print(
'Confusion Matrix: [[True positive, False postive], [False negative, True negative]]',
file=output)
counts = Counter((re.search(r'^"(.*?)"', l).groups()[0]
for l in (cvdir / 'dataset.txt').open()
if l.strip() != ''))
print('Dataset entry counts: ' + ", ".join(
("%s = %d" % item for item in sorted(counts.items()))),
file=output)
#alldata = defaultdict(list)
alldata = []
for i, (g_train, g_test) in zip(range(NUM_FOLDS), getGenes(cvdir)):
foldDir = cvdir / str(i)
train = foldDir / 'train.arff'
test = foldDir / 'test.arff'
X_train, y_train, _ = readArff(train)
X_test, y_test, _ = readArff(test)
assert len(g_train) == len(y_train) and len(g_test) == len(y_test)
# Preprocess
#envelope = EllipticEnvelope(contamination=0.05)
#envelope.fit(X_train)
#inliers = envelope.predict(X_train) == 1
X_train = scaler.fit_transform(X_train)
X_test = scaler.transform(X_test)
norms = [numpy.linalg.norm(x) for x in X_train]
#print(numpy.mean(norms))
#print(numpy.median(norms))
#print(numpy.max(norms))
#print(numpy.min(norms))
#print(numpy.sqrt(numpy.cov(norms)))
plotPCA(X_train, y_train, X_test, y_test, foldDir)
splitIndex = round(len(y_test) * VALIDATION_RATIO)
X_validation, y_validation, g_validation = X_test[:
splitIndex], y_test[:
splitIndex], g_test[:
splitIndex]
X_test, y_test, g_test = X_test[splitIndex:], y_test[
splitIndex:], g_test[splitIndex:]
assert len(g_train) == len(y_train) and len(g_test) == len(y_test)
#plotLDA(X_train, X_test, y_train, y_test, foldDir)
for name, Clf in clasfifiers:
alldata.append((name, i))
serFile = foldDir / (name + ".pickle.bz2")
if serFile.is_file() and not rerun:
continue
debug("Fitting clasifier %s for fold %d of %d in node %s." %
(name, i + 1, NUM_FOLDS, cvdir.name))
if cvdir.name != 'molecular_function':
clf = Clf()
else:
clf = DummyClassifier(strategy='constant',
constant=POSTIVE_LABEL)
clf.decision_function = lambda a: [1.0] * len(a)
print('Testing the classifier %s:' % name, file=output)
if clf.__module__.startswith('sklearn.semi_supervised'):
y_train = -y_train
y_test = -y_test
pos = (y_train == POSTIVE_LABEL)
neg = (y_train == NEGATIVE_LABEL)
posWeight = numpy.sum(neg) / len(y_train)
negWeight = numpy.sum(pos) / len(y_train)
sample_weight = posWeight * pos + negWeight * neg
try:
#clf.fit(X_train, y_train)
clf.fit(X_train, y_train, sample_weight=sample_weight)
except TypeError:
clf.fit(X_train, y_train)
y_pred = clf.predict(X_test)
#compare = numpy.empty((len(y_pred),2))
#compare[:,0] = y_test
#compare[:,1] = y_pred
#print(compare)
pos = (y_test == POSTIVE_LABEL)
neg = (y_test == NEGATIVE_LABEL)
#prec = precision_score(y_test, y_pred, average='weighted')
#reca = recall_score(y_test, y_pred, average='weighted')
score = accuracy_score(
y_test[pos], y_pred[pos]) * posWeight + accuracy_score(
y_test[neg], y_pred[neg]) * negWeight
conf = confusion_matrix(y_test, y_pred)
if len(conf) == 1:
conf = numpy.array([[conf[0][0], 0], [0, 0]])
print("Fold %d score: %.2f, confusion matrix: %s" %
(i, score * 100.0, conf.tolist()),
file=output)
clf.conf = conf
clf.fold = i
clf.name = name
clf.cvdir = cvdir
clf.X_train = X_train
clf.X_test = X_test
clf.X_validation = X_validation
clf.y_train = y_train
clf.y_test = y_test
clf.y_validation = y_validation
clf.g_train = g_train
clf.g_test = g_test
clf.g_validation = g_validation
#alldata[name].append((clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation))
with bz2.open(str(serFile), 'wb') as ser:
ser.write(dill.dumps(clf))
debug(
"Finished fitting clasifier %s for fold %d of %d in node %s."
% (name, i + 1, NUM_FOLDS, cvdir.name))
#for clfName, folds in alldata.items():
# plotRoc(clfName, folds, cvdir)
# plotPrc(clfName, folds, cvdir)
# Musí to být tady, protože funkce výše mohou objekt ještě upravovat
# for i, (clf,_,_,_,_,_,_,_,_,_) in enumerate(folds):
# foldDir = cvdir / str(i)
# with (foldDir / (name.replace(' ','')+'.pickle')).open('wb') as ser:
# pickle.dump(clf, ser)
debug("Finished learning in node %s." % cvdir.name)
return alldata
def fromXML(cls, fullName):
"""Generates protein data from stored XML file. Downloads it if not present."""
name = Gene.canonicalName(fullName, False)
fname = cls.xmlname(name)
sequence = []
structure = defaultdict(dict) # structure[seq_id][seq_position] == coordinates
sequences = defaultdict(dict)
strand2seq = {}
# Download data if not stored on disc
if not fname.is_file():
debug("Downloading file for gene %s... " % name, False)
req = Request(
cls.XML_URL % name,
headers={
"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36"
},
)
with fname.open("wb") as f:
f.write(urlopen(req).read())
# debug("Done.")
# Parse the file
debug("Parsing XML for gene %s... " % name)
tag_stack = []
elem_stack = []
pp_seq_id = None
with gzip.open(str(fname), "r") as f:
# fcntl.lockf(f.fileno(), fcntl.LOCK_EX)
doc = ElementTree.iterparse(f, ("start", "end"))
# next(doc) # Skip root element
_, root = next(doc)
XMLNS = root.tag[: root.tag.find("}") + 1]
path_atom = [XMLNS + "atom_siteCategory", XMLNS + "atom_site"]
path_seq = [XMLNS + "entity_poly_seqCategory", XMLNS + "entity_poly_seq"]
path_poly = [XMLNS + "entity_polyCategory", XMLNS + "entity_poly"]
whitespace = re.compile(r"\s+")
for event, elem in doc:
if event == "start":
tag_stack.append(elem.tag)
elem_stack.append(elem)
elif event == "end":
if tag_stack == path_atom:
# elem[11] = <PDBx:label_atom_id>, elem[5] = <PDBx:auth_atom_id>
if elem[11].text == "CA" and elem[5].text == "CA":
# elem[13] = <PDBx:label_entity_id>
seq_id = elem[13].text
# elem[14] = <PDBx:label_seq_id>, elem[{1,2,3}] = <PDBx:Cartn_{xyz}>
label_seq_id = elem[14].text
if label_seq_id is not None:
coordinates = [float(elem[i].text) for i in (1, 2, 3)]
seq_pos = int(elem[14].text) - 1
structure[seq_id][seq_pos] = tuple(coordinates)
elem_stack[-2].remove(elem)
elif tag_stack == path_poly:
seq_type = elem.find(XMLNS + "type").text
if seq_type.startswith("polypeptide"): # elem[5] = <PDBx:type>
seq = elem.find(XMLNS + "pdbx_seq_one_letter_code_can").text
sequence = [MAPPING[c] for c in re.sub(whitespace, "", seq)]
seq_id = elem.attrib["entity_id"]
strand_ids = elem.find(XMLNS + "pdbx_strand_id").text
strand2seq.update({strand_id: seq_id for strand_id in strand_ids.split(",")})
sequences[seq_id] = sequence
elem_stack[-2].remove(elem)
# elif tag_stack == path_seq:
# entity_id="1" shoud be the polypeptide sequence, I hope, but I'm not sure. FIXME
# There can also be e.g. polynucleotide sequences
# if elem.attrib['entity_id'] == '1':
# sequence.append(elem.attrib['mon_id'].lower())
# elem_stack[-2].remove(elem)
if tag_stack:
tag_stack.pop()
if elem_stack:
elem_stack.pop()
# atomQuery = "./%satom_siteCategory/%satom_site[%slabel_atom_id='N'][%sauth_atom_id='N'][%slabel_entity_id='1']" % ((XMLNS,) * 5)
# seqQuery = "./%sentity_poly_seqCategory/%sentity_poly_seq[@entity_id='1']" % ((XMLNS,) * 2)
# debug("Done.")
for strand, seq in strand2seq.items():
yield cls(name + "_" + strand, tuple(sequences[seq]), tuple(structure[seq].items()))
def learningTest(cvdir):
debug("Starting learning in node %s." % cvdir.name)
clasfifiers = (
#TOOD, use third dict for params
#("Bagged SVM", lambda: BaggingClassifier(SVC(C=0.1,probability=True))),
#("LabelPropagation RBF", LabelPropagation),
#("LabelSpreading RBF", LabelSpreading),
#("LabelSpreading-7nn", lambda: LabelSpreading(kernel='knn')),
#("LabelPropagation-7nn", lambda: LabelPropagation(kernel='knn')),
#!("AdaBoost-DecisionTree", AdaBoostClassifier),
#("5-NN", lambda: KNeighborsClassifier(p=1, algorithm='kd_tree')),
#!("Random Forest", RandomForestClassifier),
#("SGD", lambda: SGDClassifier(n_iter=100,alpha=0.01,loss="modified_huber")),
("RBF SVM C=1", lambda: SVC(shrinking=False, tol=1e-5,probability=True)),
#("RBF SVM C=0.5", lambda : SVC(C=0.1,probability=True)),
#("RBF SVM C=2", lambda : SVC(C=10,probability=True)),
#("RBF SVM C=inf", lambda : SVC(C=numpy.inf,probability=True)),
#("Linear SVM C=1", lambda: SVC(kernel='linear',probability=True)),
#("Quadratic SVM C=1", lambda: SVC(kernel='poly', degree=2,probability=True)),
#("Cubic SVM C=1", lambda: SVC(kernel='poly', degree=3,probability=True)),
)
scaler = StandardScaler(copy=False)
with (cvdir / 'scores.txt').open('w') as output:
print('Cross Validation results for file term %s:' % cvdir.name, file=output)
print('Confusion Matrix: [[True positive, False postive], [False negative, True negative]]', file=output)
counts = Counter(
(re.search(r'^"(.*?)"', l).groups()[0]
for l in (cvdir / 'dataset.txt').open()
if l.strip() != ''))
print('Dataset entry counts: ' +
", ".join(
("%s = %d" % item
for item
in sorted(counts.items()))),
file = output)
#alldata = defaultdict(list)
alldata = []
for i, (g_train, g_test) in zip(range(NUM_FOLDS), getGenes(cvdir)) :
foldDir = cvdir / str(i)
train = foldDir / 'train.arff'
test = foldDir / 'test.arff'
X_train, y_train, _ = readArff(train)
X_test , y_test, _ = readArff(test)
assert len(g_train) == len(y_train) and len(g_test) == len(y_test)
# Preprocess
#envelope = EllipticEnvelope(contamination=0.05)
#envelope.fit(X_train)
#inliers = envelope.predict(X_train) == 1
X_train = scaler.fit_transform(X_train)
X_test = scaler.transform(X_test)
norms = [numpy.linalg.norm(x) for x in X_train]
#print(numpy.mean(norms))
#print(numpy.median(norms))
#print(numpy.max(norms))
#print(numpy.min(norms))
#print(numpy.sqrt(numpy.cov(norms)))
plotPCA(X_train, y_train, X_test, y_test, foldDir)
splitIndex = round(len(y_test)*VALIDATION_RATIO)
X_validation, y_validation, g_validation = X_test[:splitIndex], y_test[:splitIndex], g_test[:splitIndex]
X_test, y_test, g_test = X_test[splitIndex:], y_test[splitIndex:], g_test[splitIndex:]
assert len(g_train) == len(y_train) and len(g_test) == len(y_test)
#plotLDA(X_train, X_test, y_train, y_test, foldDir)
for name, Clf in clasfifiers:
alldata.append(( name, i))
serFile = foldDir / (name + ".pickle.bz2")
if serFile.is_file() and not rerun:
continue
debug("Fitting clasifier %s for fold %d of %d in node %s." % (name, i+1, NUM_FOLDS, cvdir.name))
if cvdir.name != 'molecular_function':
clf = Clf()
else:
clf = DummyClassifier(strategy='constant', constant=POSTIVE_LABEL)
clf.decision_function = lambda a: [1.0]*len(a)
print('Testing the classifier %s:' % name, file=output)
if clf.__module__.startswith('sklearn.semi_supervised'):
y_train = - y_train
y_test = - y_test
pos = (y_train == POSTIVE_LABEL)
neg = (y_train == NEGATIVE_LABEL)
posWeight = numpy.sum(neg) / len(y_train)
negWeight = numpy.sum(pos) / len(y_train)
sample_weight = posWeight*pos + negWeight*neg
try:
#clf.fit(X_train, y_train)
clf.fit(X_train, y_train, sample_weight = sample_weight)
except TypeError:
clf.fit(X_train, y_train)
y_pred = clf.predict(X_test)
#compare = numpy.empty((len(y_pred),2))
#compare[:,0] = y_test
#compare[:,1] = y_pred
#print(compare)
pos = (y_test == POSTIVE_LABEL)
neg = (y_test == NEGATIVE_LABEL)
#prec = precision_score(y_test, y_pred, average='weighted')
#reca = recall_score(y_test, y_pred, average='weighted')
score = accuracy_score(y_test[pos], y_pred[pos])*posWeight + accuracy_score(y_test[neg], y_pred[neg])*negWeight
conf = confusion_matrix(y_test, y_pred)
if len(conf) == 1:
conf = numpy.array([[conf[0][0], 0],[0,0]])
print("Fold %d score: %.2f, confusion matrix: %s" % (i, score*100.0, conf.tolist()), file=output)
clf.conf = conf
clf.fold = i
clf.name = name
clf.cvdir = cvdir
clf.X_train = X_train
clf.X_test = X_test
clf.X_validation = X_validation
clf.y_train = y_train
clf.y_test = y_test
clf.y_validation = y_validation
clf.g_train = g_train
clf.g_test = g_test
clf.g_validation = g_validation
#alldata[name].append((clf, X_train, y_train, X_test, y_test, X_validation, y_validation, g_train, g_test, g_validation))
with bz2.open(str(serFile), 'wb') as ser:
ser.write(dill.dumps(clf))
debug("Finished fitting clasifier %s for fold %d of %d in node %s." % (name, i+1, NUM_FOLDS, cvdir.name))
#for clfName, folds in alldata.items():
# plotRoc(clfName, folds, cvdir)
# plotPrc(clfName, folds, cvdir)
# Musí to být tady, protože funkce výše mohou objekt ještě upravovat
# for i, (clf,_,_,_,_,_,_,_,_,_) in enumerate(folds):
# foldDir = cvdir / str(i)
# with (foldDir / (name.replace(' ','')+'.pickle')).open('wb') as ser:
# pickle.dump(clf, ser)
debug("Finished learning in node %s." % cvdir.name)
return alldata
