100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
#!/bin/env python
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#Copyright ReportLab Europe Ltd. 2000-2004
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#see license.txt for license details
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#history http://www.reportlab.co.uk/cgi-bin/viewcvs.cgi/public/reportlab/trunk/reportlab/lib/formatters.py
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__version__=''' $Id: formatters.py 2385 2004-06-17 15:26:05Z rgbecker $ '''
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__doc__="""
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These help format numbers and dates in a user friendly way.
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Used by the graphics framework.
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"""
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import string, sys, os
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class Formatter:
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"Base formatter - simply applies python format strings"
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def __init__(self, pattern):
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self.pattern = pattern
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def format(self, obj):
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return self.pattern % obj
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def __repr__(self):
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return "%s('%s')" % (self.__class__.__name__, self.pattern)
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def __call__(self, x):
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return self.format(x)
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class DecimalFormatter(Formatter):
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"""lets you specify how to build a decimal.
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A future NumberFormatter class will take Microsoft-style patterns
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instead - "$#,##0.00" is WAY easier than this."""
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def __init__(self, places=2, decimalSep='.', thousandSep=None, prefix=None, suffix=None):
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self.places = places
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self.dot = decimalSep
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self.comma = thousandSep
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self.prefix = prefix
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self.suffix = suffix
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def format(self, num):
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# positivize the numbers
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sign=num<0
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if sign:
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num = -num
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places, sep = self.places, self.dot
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strip = places<=0
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if places and strip: places = -places
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strInt = ('%.' + str(places) + 'f') % num
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if places:
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strInt, strFrac = strInt.split('.')
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strFrac = sep + strFrac
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if strip:
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while strFrac and strFrac[-1] in ['0',sep]: strFrac = strFrac[:-1]
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else:
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strFrac = ''
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if self.comma is not None:
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strNew = ''
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while strInt:
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left, right = strInt[0:-3], strInt[-3:]
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if left == '':
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#strNew = self.comma + right + strNew
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strNew = right + strNew
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else:
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strNew = self.comma + right + strNew
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strInt = left
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strInt = strNew
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strBody = strInt + strFrac
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if sign: strBody = '-' + strBody
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if self.prefix:
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strBody = self.prefix + strBody
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if self.suffix:
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strBody = strBody + self.suffix
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return strBody
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def __repr__(self):
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return "%s(places=%d, decimalSep=%s, thousandSep=%s, prefix=%s, suffix=%s)" % (
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self.__class__.__name__,
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self.places,
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repr(self.dot),
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repr(self.comma),
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repr(self.prefix),
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repr(self.suffix)
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)
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if __name__=='__main__':
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def t(n, s, places=2, decimalSep='.', thousandSep=None, prefix=None, suffix=None):
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f=DecimalFormatter(places,decimalSep,thousandSep,prefix,suffix)
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r = f(n)
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print "places=%2d dot=%-4s comma=%-4s prefix=%-4s suffix=%-4s result=%10s %s" %(f.places, f.dot, f.comma, f.prefix, f.suffix,r, r==s and 'OK' or 'BAD')
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t(1000.9,'1,000.9',1,thousandSep=',')
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t(1000.95,'1,001.0',1,thousandSep=',')
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t(1000.95,'1,001',-1,thousandSep=',')
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t(1000.9,'1,001',0,thousandSep=',')
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t(1000.9,'1000.9',1)
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t(1000.95,'1001.0',1)
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t(1000.95,'1001',-1)
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t(1000.9,'1001',0)
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t(1000.1,'1000.1',1)
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t(1000.55,'1000.6',1)
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t(1000.449,'1000.4',-1)
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t(1000.45,'1000',0) |