A simple function to determine what format page a page in document has. Parameters provided are width and height in float or integer format.
Return is a string like "A4-P" or "Letter-L" when an exact fit is found. If not, information is provided as a string like "width x height (other), closest <format> width x height". The closest format in this case is determined by minimizing the sum of absolute differences of width and height with a table of official formats.
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | def find_close(w, h):
PaperSizes = { # add new: ensure that first number is <= second number
'A0': [2384, 3370],
'A1': [1684, 2384],
'A2': [1190, 1684],
'A3': [842, 1190],
'A4': [595, 842],
'A5': [420, 595],
'A6': [298, 420],
'A7': [210, 298],
'A8': [148, 210],
'B0': [2835, 4008],
'B1': [2004, 2835],
'B2': [1417, 2004],
'B3': [1001, 1417],
'B4': [709, 1001],
'B5': [499, 709],
'B6': [354, 499],
'B7': [249, 354],
'B8': [176, 249],
'B9': [125, 176],
'B10': [88, 125],
'C2': [1837, 578],
'C3': [578, 919],
'C4': [919, 649],
'C5': [649, 459],
'C6': [459, 323],
'Invoice': [396, 612],
'Executive': [522, 756],
'Letter': [612, 792],
'Legal': [612, 1008],
'Ledger': [792, 1224],
}
wi = int(round(w, 0))
hi = int(round(h, 0))
if w <= h:
w1 = wi
h1 = hi
else:
w1 = hi
h1 = wi
sw = str(w1)
sh = str(h1)
stab = [abs(w1-s[0])+abs(h1-s[1]) for s in PaperSizes.values()]
small = min(stab)
idx = stab.index(small)
f = PaperSizes.keys()[idx]
if w <= h:
ff = f + "-P"
ss = str(PaperSizes[f][0]) + " x " + str(PaperSizes[f][1])
else:
ff = f + "-L"
ss = str(PaperSizes[f][1]) + " x " + str(PaperSizes[f][0])
if small == 0: # exact fit
return ff
rtxt = "%s x %s (other), closest: %s = %s" # else show best fit
rtxt = rtxt % (sw, sh, ff, ss)
return rtxt
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The values for paper formats are in pixels and are based on official sources like DIN formats, and http://www.edsebooks.com/paper/papersize.html, etc.
Obviously, this list is not complete - there are hundreds of formats in this world, but contains most common formats of the "Western Hemissphere" only (by the author's estimation).
Feel free to add more formats to the dictionary. But please do let me know in such cases.
