diff options
Diffstat (limited to 'Lib/locale.py')
| -rw-r--r-- | Lib/locale.py | 170 |
1 files changed, 126 insertions, 44 deletions
diff --git a/Lib/locale.py b/Lib/locale.py index cfc69b1..fd549bb 100644 --- a/Lib/locale.py +++ b/Lib/locale.py @@ -88,13 +88,16 @@ except ImportError: ### Number formatting APIs # Author: Martin von Loewis +# improved by Georg Brandl #perform the grouping from right to left -def _group(s): - conv=localeconv() - grouping=conv['grouping'] - if not grouping:return (s, 0) - result="" +def _group(s, monetary=False): + conv = localeconv() + thousands_sep = conv[monetary and 'mon_thousands_sep' or 'thousands_sep'] + grouping = conv[monetary and 'mon_grouping' or 'grouping'] + if not grouping: + return (s, 0) + result = "" seps = 0 spaces = "" if s[-1] == ' ': @@ -103,63 +106,142 @@ def _group(s): s = s[:sp] while s and grouping: # if grouping is -1, we are done - if grouping[0]==CHAR_MAX: + if grouping[0] == CHAR_MAX: break # 0: re-use last group ad infinitum - elif grouping[0]!=0: + elif grouping[0] != 0: #process last group - group=grouping[0] - grouping=grouping[1:] + group = grouping[0] + grouping = grouping[1:] if result: - result=s[-group:]+conv['thousands_sep']+result + result = s[-group:] + thousands_sep + result seps += 1 else: - result=s[-group:] - s=s[:-group] + result = s[-group:] + s = s[:-group] if s and s[-1] not in "0123456789": # the leading string is only spaces and signs - return s+result+spaces,seps + return s + result + spaces, seps if not result: - return s+spaces,seps + return s + spaces, seps if s: - result=s+conv['thousands_sep']+result + result = s + thousands_sep + result seps += 1 - return result+spaces,seps - -def format(f,val,grouping=0): - """Formats a value in the same way that the % formatting would use, + return result + spaces, seps + +def format(percent, value, grouping=False, monetary=False, *additional): + """Returns the locale-aware substitution of a %? specifier + (percent). + + additional is for format strings which contain one or more + '*' modifiers.""" + # this is only for one-percent-specifier strings and this should be checked + if percent[0] != '%': + raise ValueError("format() must be given exactly one %char " + "format specifier") + if additional: + formatted = percent % ((value,) + additional) + else: + formatted = percent % value + # floats and decimal ints need special action! + if percent[-1] in 'eEfFgG': + seps = 0 + parts = formatted.split('.') + if grouping: + parts[0], seps = _group(parts[0], monetary=monetary) + decimal_point = localeconv()[monetary and 'mon_decimal_point' + or 'decimal_point'] + formatted = decimal_point.join(parts) + while seps: + sp = formatted.find(' ') + if sp == -1: break + formatted = formatted[:sp] + formatted[sp+1:] + seps -= 1 + elif percent[-1] in 'diu': + if grouping: + formatted = _group(formatted, monetary=monetary)[0] + return formatted + +import re, operator +_percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?' + r'(?P<modifiers>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]') + +def format_string(f, val, grouping=False): + """Formats a string in the same way that the % formatting would use, but takes the current locale into account. Grouping is applied if the third parameter is true.""" - result = f % val - fields = result.split(".") - seps = 0 - if grouping: - fields[0],seps=_group(fields[0]) - if len(fields)==2: - result = fields[0]+localeconv()['decimal_point']+fields[1] - elif len(fields)==1: - result = fields[0] + percents = list(_percent_re.finditer(f)) + new_f = _percent_re.sub('%s', f) + + if isinstance(val, tuple): + new_val = list(val) + i = 0 + for perc in percents: + starcount = perc.group('modifiers').count('*') + new_val[i] = format(perc.group(), new_val[i], grouping, False, *new_val[i+1:i+1+starcount]) + del new_val[i+1:i+1+starcount] + i += (1 + starcount) + val = tuple(new_val) + elif operator.isMappingType(val): + for perc in percents: + key = perc.group("key") + val[key] = format(perc.group(), val[key], grouping) else: - raise Error, "Too many decimal points in result string" + # val is a single value + val = format(percents[0].group(), val, grouping) + + return new_f % val + +def currency(val, symbol=True, grouping=False, international=False): + """Formats val according to the currency settings + in the current locale.""" + conv = localeconv() - while seps: - # If the number was formatted for a specific width, then it - # might have been filled with spaces to the left or right. If - # so, kill as much spaces as there where separators. - # Leading zeroes as fillers are not yet dealt with, as it is - # not clear how they should interact with grouping. - sp = result.find(" ") - if sp==-1:break - result = result[:sp]+result[sp+1:] - seps -= 1 + # check for illegal values + digits = conv[international and 'int_frac_digits' or 'frac_digits'] + if digits == 127: + raise ValueError("Currency formatting is not possible using " + "the 'C' locale.") + + s = format('%%.%if' % digits, abs(val), grouping, monetary=True) + # '<' and '>' are markers if the sign must be inserted between symbol and value + s = '<' + s + '>' + + if symbol: + smb = conv[international and 'int_curr_symbol' or 'currency_symbol'] + precedes = conv[val<0 and 'n_cs_precedes' or 'p_cs_precedes'] + separated = conv[val<0 and 'n_sep_by_space' or 'p_sep_by_space'] + + if precedes: + s = smb + (separated and ' ' or '') + s + else: + s = s + (separated and ' ' or '') + smb + + sign_pos = conv[val<0 and 'n_sign_posn' or 'p_sign_posn'] + sign = conv[val<0 and 'negative_sign' or 'positive_sign'] + + if sign_pos == 0: + s = '(' + s + ')' + elif sign_pos == 1: + s = sign + s + elif sign_pos == 2: + s = s + sign + elif sign_pos == 3: + s = s.replace('<', sign) + elif sign_pos == 4: + s = s.replace('>', sign) + else: + # the default if nothing specified; + # this should be the most fitting sign position + s = sign + s - return result + return s.replace('<', '').replace('>', '') def str(val): """Convert float to integer, taking the locale into account.""" - return format("%.12g",val) + return format("%.12g", val) -def atof(string,func=float): +def atof(string, func=float): "Parses a string as a float according to the locale settings." #First, get rid of the grouping ts = localeconv()['thousands_sep'] @@ -179,10 +261,10 @@ def atoi(str): def _test(): setlocale(LC_ALL, "") #do grouping - s1=format("%d", 123456789,1) + s1 = format("%d", 123456789,1) print s1, "is", atoi(s1) #standard formatting - s1=str(3.14) + s1 = str(3.14) print s1, "is", atof(s1) ### Locale name aliasing engine |