def tune_token(a_token, allow_untyped_numbers=False, raise_error_if_no_corners=True, base_namespace=None):
if a_token.startswith("<"):
return IRI(remove_corners(a_uri=a_token,
raise_error_if_no_corners=raise_error_if_no_corners))
elif a_token.startswith('"'):
content, elem_type = parse_literal(an_elem=a_token,
base_namespace=base_namespace)
return Literal(content=content,
elem_type=elem_type)
elif a_token.startswith("_:"):
return BNode(identifier=a_token[2:])
elif a_token.strip() == "[]":
return BNode(identifier=a_token)
if allow_untyped_numbers:
try:
candidate_float = float(a_token)
if _is_integer(candidate_float):
return Literal(content=a_token.strip(),
elem_type=INTEGER_TYPE)
return Literal(content=a_token.strip(),
elem_type=FLOAT_TYPE)
except:
pass
content, elem_type = parse_unquoted_literal(a_token)
return Literal(content=content,
elem_type=elem_type)
def tune_subj(a_token, raise_error_if_no_corners=True):
if a_token.startswith("<"):
return IRI(remove_corners(a_uri=a_token,
raise_error_if_no_corners=raise_error_if_no_corners))
elif a_token.startswith("_:"):
return BNode(identifier=a_token[2:])
elif a_token.strip() == "[]":
return BNode(identifier=a_token)
else: # ???
raise ValueError("Unrecognized token in subject position: " + a_token)
def tune_subj(a_token):
if a_token.startswith("<"):
return IRI(remove_corners(a_token))
elif a_token.startswith('"'):
content, elem_type = parse_literal(a_token)
return Literal(content=content, elem_type=elem_type)
elif a_token.startswith("_:"):
return BNode(identifier=a_token[2:])
elif a_token.strip() == "[]":
return BNode(identifier=a_token)
else: # ???
content, elem_type = parse_unquoted_literal(a_token)
return Literal(content=content, elem_type=elem_type)
def create_IRI_from_string(an_str):
return IRI(content=an_str)