def validate_chemical_formula(chemical_formula):
""" checks chemical formalae for plausibility """
# first we check if the formula seems like a chemical formula
m = re.match(chemical_formula)
if m is None:
raise ValidationError(u'%s does not seem to be a chemical formula' %
chemical_formula)
# we outsource the checking of individual atoms to the chemlib
result = checkatoms(chemical_formula)
if result != 0:
raise ValidationError(u'%s is not an atom' % result)
def get_chemical_formula(chemical_formula):
""" checks chemical formalae for plausibility """
# first we check if the formula seems like a chemical formula
m = atomregex.findall(chemical_formula)
if m is not None:
for form in m:
if checkatoms(form[0]):
return form[0]
return u''
def validate_chemical_formula(chemical_formula):
""" checks chemical formalae for plausibility """
# first we check if the formula seems like a chemical formula
m = re.match(chemical_formula)
if m is None:
raise ValidationError(u'%s does not seem to be a chemical formula' % chemical_formula)
# we outsource the checking of individual atoms to the chemlib
result = checkatoms(chemical_formula)
if result != 0:
raise ValidationError(u'%s is not an atom' % result)
