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Merge pull request #117 from native-api/png_pred_errors 

make ValueError's descriptive
pull/55/head
Yusuke Shinyama 2016-09-11 23:55:34 +09:00 committed by GitHub
parent f1dd9ea6d2 63c9378b8b
commit c753dbac4c
1 changed files with 2 additions and 2 deletions
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4
pdfminer/utils.py
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@ -11,7 +11,7 @@ from sys import maxint as INF
def apply_png_predictor(pred, colors, columns, bitspercomponent, data): def apply_png_predictor(pred, colors, columns, bitspercomponent, data):
if bitspercomponent != 8: if bitspercomponent != 8:
# unsupported # unsupported
raise ValueError(bitspercomponent) raise ValueError("Unsupported `bitspercomponent': %d"%bitspercomponent)
nbytes = colors*columns*bitspercomponent//8 nbytes = colors*columns*bitspercomponent//8
i = 0 i = 0
buf = b'' buf = b''
@ -43,7 +43,7 @@ def apply_png_predictor(pred, colors, columns, bitspercomponent, data):
line2 += chr(c) line2 += chr(c)
else: else:
# unsupported # unsupported
raise ValueError(ft) raise ValueError("Unsupported predictor value: %d"%ft)
buf += line2 buf += line2
line0 = line2 line0 = line2
return buf return buf