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#!/bin/env python
#Copyright ReportLab Europe Ltd. 2000-2004
#see license.txt for license details
#history http://www.reportlab.co.uk/cgi-bin/viewcvs.cgi/public/reportlab/trunk/reportlab/lib/units.py
__version__=''' $Id: units.py 2524 2005-02-17 08:43:01Z rgbecker $ '''
inch = 72.0
cm = inch / 2.54
mm = cm * 0.1
pica = 12.0
def toLength(s):
'''convert a string to a length'''
try:
if s[-2:]=='cm': return float(s[:-2])*cm
if s[-2:]=='in': return float(s[:-2])*inch
if s[-2:]=='pt': return float(s[:-2])
if s[-1:]=='i': return float(s[:-1])*inch
if s[-2:]=='mm': return float(s[:-2])*mm
if s[-4:]=='pica': return float(s[:-4])*pica
return float(s)
except:
raise ValueError, "Can't convert '%s' to length" % s
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