With Guido's 'do': [notice that count is rebindable in the thunk]
class iterclose:
def __init__(self,iterwclose):
self.iter = iterwclose
def __call__(self,thunk):
try:
for x in self.iter:
thunk(x)
finally:
self.iter.close()
count = 0
do iterclose(open('blah.txt')): (line):
if line.find('Python') >=0:
count += 1
print line,
----
class autoclose1:
def __init__(self,file):
self.file = file
def __call__(self,thunk):
try:
thunk(self.file)
finally:
self.file.close()
count = 0
do autoclose1(open('blah.txt')): (myfile):
for line in myfile:
if line.find('Python') >=0:
count += 1
print line,
----
class autoclose2:
def __init__(self,file):
self.file = file
def __call__(self,thunk):
try:
thunk()
finally:
self.file.close()
count = 0
myfile = open('blah.txt')
do autoclose2(open('blah.txt')):
for line in myfile:
if line.find('Python') >=0:
count += 1
print line,
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