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Added optional second arg to what(), giving the data read from the file 

(then f may be None).
This commit is contained in:
Guido van Rossum 1996-07-30 16:26:42 +00:00
parent 56a733856e
commit 81749b0754
1 changed files with 13 additions and 7 deletions
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20
Lib/imghdr.py
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@ -5,13 +5,19 @@
# Recognize sound headers #
#-------------------------#
def what(filename):
f = open(filename, 'r')
h = f.read(32)
for tf in tests:
res = tf(h, f)
if res:
return res
def what(filename, h=None):
if not h:
f = open(filename, 'r')
h = f.read(32)
else:
f = None
try:
for tf in tests:
res = tf(h, f)
if res:
return res
finally:
if f: f.close()
return None