[issue9961] Identity Crisis! variable assignment using strftime fails comparison test.
Bill Hawkes williamhawke...@yahoo.com added the comment: Yes, it is working now. Thanks for the timely response. In looking at the tutorial, the only strings used with boolean operators ( | | == | = | = | !=) were strings of the numeric variety. I saw no examples using words. I know the datetime module has a function for enumerating the days of the week, but it starts with Monday and ends with Sunday. I needed to start with Sunday and end with Saturday. The first thing I found for checking letter-filled strings was the is operator. Perhaps a brief example of word comparisons in the tutorial would be useful. I know it would have helped me. I can't say I have a clear understanding of the difference between the is and == operators, but I can accept that there apparently is some difference and there are situations where that difference matters. Again, thanks for the quick response. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9961 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9961] Identity Crisis! variable assignment using strftime fails comparison test.
New submission from Bill Hawkes williamhawke...@yahoo.com:
See below. When variable assignment is used with strftime for the day of the
week, it fails comparison checks for the days of the week. Even when using the
str() function it still fails. Manual entry of variable assignment is required
for a successful comparison. This pretty well defeats the purpose of computer
programming (automation). There seems to be a real identity crisis here!
$ python3
Python 3.0rc1+ (py3k, Oct 28 2008, 09:23:29)
[GCC 4.3.2] on linux2
import time
from datetime import date
today = date.today()
print(This line will always print)
This line will always print
myday = today.fromordinal(today.toordinal() - 31)
printthis = myday.strftime(%m-%d-%y. %d %b %Y is a %A on the %d day of
%B.)
print(%s % printthis)
08-27-10. 27 Aug 2010 is a Friday on the 27 day of August.
# dow is Day Of Week variable
... dow = myday.strftime(%A)
chkval = dow
dow is chkval
True
print(dow is %s % dow)
dow is Friday
print(chkval is %s % chkval)
chkval is Friday
print(%s % dow)
Friday
print(%s % chkval)
Friday
dow is chkval
True
if dow is 'Sunday':
...cntbck = 0
... elif dow is 'Monday':
...cntbck = 1
... elif dow is 'Tuesday':
...cntbck = 2
... elif dow is 'Wednesday':
...cntbck = 3
... elif dow is 'Thursday':
...cntbck = 4
... elif dow is 'Friday':
...cntbck = 5
... elif dow is 'Saturday':
...cntbck = 6
... else:
...cntbck = 'undefined'
...print(What day is it? It is %s % dow)
...
What day is it? It is Friday
print('finished with script')
finished with script
dow is 'Friday'
False
dow = 'Friday'
dow is 'Friday'
True
chkval
'Friday'
dow
'Friday'
chkval is dow
False
chkval is 'Friday'
False
chkval
'Friday'
chkval = str(chkval)
chkval
'Friday'
chkval is 'Friday'
False
cntbck
'undefined'
--
components: Interpreter Core
messages: 117449
nosy: BillHawkes
priority: normal
severity: normal
status: open
title: Identity Crisis! variable assignment using strftime fails comparison
test.
type: behavior
versions: Python 3.1
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[issue9961] Identity Crisis! variable assignment using strftime fails comparison test.
Jean-Paul Calderone inva...@example.invalid added the comment: You mistakenly used is for these comparisons, rather than ==. The strftime involvement is a red herring. The real problem is the use of an /identity/ comparison rather than an /equality/ comparison. -- nosy: +exarkun resolution: - invalid status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9961 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
