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eef1d4e8b1
format(), str(), atof(), and atoi(). The last three are locale sensitive versions of the corresponding standard functions (only for numbers though); format() does general %[efg] formatting taking the locale into account, optionally with thousands grouping.
76 lines
2.0 KiB
Python
76 lines
2.0 KiB
Python
"Support for number formatting using the current locale settings"
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from _locale import *
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import string
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#perform the grouping from right to left
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def _group(s):
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conv=localeconv()
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grouping=conv['grouping']
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if not grouping:return s
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result=""
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while s and grouping:
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# if grouping is -1, we are done
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if grouping[0]==CHAR_MAX:
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break
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# 0: re-use last group ad infinitum
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elif grouping[0]!=0:
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#process last group
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group=grouping[0]
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grouping=grouping[1:]
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if result:
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result=s[-group:]+conv['thousands_sep']+result
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else:
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result=s[-group:]
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s=s[:-group]
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if s and result:
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result=s+conv['thousands_sep']+result
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return result
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def format(f,val,grouping=0):
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"""Formats a value in the same way that the % formatting would use,
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but takes the current locale into account.
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Grouping is applied if the third parameter is true."""
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result = f % val
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fields = string.splitfields(result,".")
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if grouping:
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fields[0]=_group(fields[0])
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if len(fields)==2:
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return fields[0]+localeconv()['decimal_point']+fields[1]
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elif len(fields)==1:
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return fields[0]
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else:
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raise Error,"Too many decimal points in result string"
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def str(val):
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"""Convert float to integer, taking the locale into account."""
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return format("%.12g",val)
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def atof(str,func=string.atof):
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"Parses a string as a float according to the locale settings."
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#First, get rid of the grouping
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s=string.splitfields(str,localeconv()['thousands_sep'])
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str=string.join(s,"")
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#next, replace the decimal point with a dot
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s=string.splitfields(str,localeconv()['decimal_point'])
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str=string.join(s,'.')
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#finally, parse the string
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return func(str)
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def atoi(str):
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"Converts a string to an integer according to the locale settings."
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return atof(str,string.atoi)
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def test():
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setlocale(LC_ALL,"")
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#do grouping
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s1=format("%d",123456789,1)
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print s1,"is",atoi(s1)
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#standard formatting
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s1=str(3.14)
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print s1,"is",atof(s1)
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if __name__=='__main__':
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test()
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