On Sep 9, 2009, at 4:50 PM, r wrote:
On Sep 9, 3:18 pm, David C Ullrich <dullr...@sprynet.com> wrote:
(snip)
These days I've actually got the syntax and spelling memorized -
I can type "close()" without needing to look it up!
+1
You are so right David! I think some people around here need to look
up "code reuse". Here are a couple of simple templates for our friends
to study...
def read_file(fname, mode='rb'):
'''open file and return contents'''
try:
f = open(fname, mode)
s = f.read()
return s
except:
return 0
finally:
f.close()
def write_file(fname, s, mode='wb'):
'''open file, truncate, and write string'''
try:
f = open(fname, mode)
f.write(s)
return 1
except:
return 0
finally:
f.close()
Unfortunately, both of these simple templates have the following
problem -- if open fails, a NameError will be raised from the finally
block.
def read_file(fname, mode='rb'):
'''open file and return contents'''
f = open(fname, mode)
try:
return f.read()
finally:
f = f.close()
I removed the except block because I prefer exceptions to error codes.
def write_file(fname, s, mode='wb'):
'''open file, truncate, and write string'''
f = open(fname, mode)
try:
f.write(s)
finally:
f = f.close()
In addition to fixing the latent bug in the second simple template, I
took the opportunity to correct your heinous violation of command-
query separation.
Charles Yeomans
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