92 if not (from_query
and to_query):
95 measured = re.match(RE_MEASURE, from_query, re.VERBOSE)
96 if not (measured
and measured.group(
'number'), measured.group(
'unit')):
105 source_list, target_list = [], []
107 for symbol, si_name, from_si, to_si, orig_symbol
in symbol_to_si():
109 if symbol == measured.group(
'unit'):
110 source_list.append((si_name, to_si))
111 if symbol == to_query:
112 target_list.append((si_name, from_si, orig_symbol))
114 if not (source_list
and target_list):
117 source_to_si = target_from_si = target_symbol =
None
121 for source
in source_list:
122 for target
in target_list:
123 if source[0] == target[0]:
124 source_to_si = source[1]
125 target_from_si = target[1]
126 target_symbol = target[2]
128 if not (source_to_si
and target_from_si):
131 _locale = get_locale()
or 'en_US'
133 value = measured.group(
'sign') + measured.group(
'number') + (measured.group(
'E')
or '')
134 value = babel.numbers.parse_decimal(value, locale=_locale)
138 if isinstance(source_to_si, (float, int)):
139 value = float(value) * source_to_si
141 value = source_to_si(float(value))
145 if isinstance(target_from_si, (float, int)):
146 value = float(value) * target_from_si
148 value = target_from_si(float(value))
150 if measured.group(
'E'):
152 result = babel.numbers.format_scientific(value, locale=_locale)
154 result = babel.numbers.format_decimal(value, locale=_locale, format=
'#,##0.##########;-#')
156 return f
'{result} {target_symbol}'