def handle_number(number):
if 'E' in number:
number, exp = number.split('E', 1)
else:
exp = None
if '@' in number:
if '.' in number and '0' in number:
raise ValueError(
'Significant digit patterns can not contain '
'"@" or "0"')
if '.' in number:
integer, fraction = number.rsplit('.', 1)
else:
integer = number
fraction = ''
int_prec = parse_precision(integer)
frac_prec = parse_precision(fraction)
if exp:
frac_prec = parse_precision(integer + fraction)
exp_plus = exp.startswith('+')
exp = exp.lstrip('+')
exp_prec = parse_precision(exp)
else:
exp_plus = None
exp_prec = None
grouping = parse_grouping(integer)
return (grouping, int_prec, frac_prec, exp_prec, exp_plus)
def test_parse_grouping():
assert numbers.parse_grouping('##') == (1000, 1000)
assert numbers.parse_grouping('#,###') == (3, 3)
assert numbers.parse_grouping('#,####,###') == (3, 4)
def test_parse_grouping():
assert numbers.parse_grouping('##') == (1000, 1000)
assert numbers.parse_grouping('#,###') == (3, 3)
assert numbers.parse_grouping('#,####,###') == (3, 4)
def parse_pattern(pattern):
"""Parse number format patterns"""
if isinstance(pattern, NumberPattern):
return pattern
def _match_number(pattern):
rv = number_re.search(pattern)
if rv is None:
raise ValueError('Invalid number pattern %r' % pattern)
return rv.groups()
# Do we have a negative subpattern?
pattern = CLEAN_CURRENCY_RE.sub('\\1', pattern.replace('\\', ''))
pattern = CLEAN_RE.sub('', pattern).strip().replace('_', ' ')
if ';' in pattern:
pattern, neg_pattern = pattern.split(';', 1)
# maybe zero and text pattern
neg_pattern = neg_pattern.split(';', 1)[0]
pos_prefix, number, pos_suffix = _match_number(pattern)
neg_prefix, _, neg_suffix = _match_number(neg_pattern)
# TODO Do not remove from neg prefix
neg_prefix = '-' + neg_prefix
else:
pos_prefix, number, pos_suffix = _match_number(pattern)
neg_prefix = '-' + pos_prefix
neg_suffix = pos_suffix
if 'E' in number:
number, exp = number.split('E', 1)
else:
exp = None
if '@' in number:
if '.' in number and '0' in number:
raise ValueError('Significant digit patterns can not contain '
'"@" or "0"')
if '.' in number:
integer, fraction = number.rsplit('.', 1)
else:
integer = number
fraction = ''
def parse_precision(p):
"""Calculate the min and max allowed digits"""
min = max = 0
for c in p:
if c in '@0':
min += 1
max += 1
elif c == '#':
max += 1
elif c in ',. ':
continue
else:
break
return min, max
int_prec = parse_precision(integer)
frac_prec = parse_precision(fraction)
if exp:
frac_prec = parse_precision(integer + fraction)
exp_plus = exp.startswith('+')
exp = exp.lstrip('+')
exp_prec = parse_precision(exp)
else:
exp_plus = None
exp_prec = None
grouping = parse_grouping(integer)
number_pattern = ColorNumberPattern(pattern, (pos_prefix, neg_prefix),
(pos_suffix, neg_suffix), grouping,
int_prec, frac_prec, exp_prec,
exp_plus)
return number_pattern
