Christopher Spears wrote:
Hey,
I'm working on a problem out of Core Python Programming (2nd Edition).
Basically, I'm creating a class that formats dates. Here is what I have so far:
Consider reformatting the month_dict so each name and abbreviation is a
key. Then you can just look up the potential key rather than looping
thru all the keys. That is what dictionaries are for!:
month_dict = {"jan" : 1,
"january" : 1,
"feb" : 2,
"february" :2, etc ...}
...
except ValueError:
if month.lower() in month_dict:
month = month_dict[month.lower()]
else:
month = ""
The dict function is also handy here:
month_dict = dict(
jan = 1,
january = 1,
feb = 2,
february = 2, etc ...)
Consider using another dictionary for the formats:
format_dict = dict(
MDY = "%m/%d/%y",
MDYY = "%m/%d/%Y",
DMY = "%d/%m/%y",
DMYY = "%d/%m/%Y",
MODYY = "%b %d, %Y",)
#!/usr/bin/python
import time
class date_format(object):
def __init__(self, month, day, year):
month_dict = {("jan","january") : 1,
("feb","february") :2,
("mar", "march") : 3,
("apr", "april") : 4,
("may") : 5,
("jun", "june") : 6,
("jul", "july") : 7,
("aug", "august") : 8,
("sep", "september") : 9,
("oct", "october"): 10,
("nov", "november"): 11,
("dec", "december"): 12
}
try:
month = int(month)
except ValueError:
for eachKey in month_dict.keys():
if month.lower() in eachKey:
month = month_dict[eachKey]
else:
month = ""
if month=="" or day=="" or year=="":
self.date = time.localtime()
else:
self.date = (int(year), month, int(day), 0, 0, 0, 0, 1,
-1)
def display(self, format_indicator = None):
if format_indicator == 'MDY':
print time.strftime("%m/%d/%y",self.date)
elif format_indicator == 'MDYY':
print time.strftime("%m/%d/%Y",self.date)
elif format_indicator == 'DMY':
print time.strftime("%d/%m/%y",self.date)
elif format_indicator == 'DMYY':
print time.strftime("%d/%m/%Y",self.date)
elif format_indicator == 'MODYY':
print time.strftime("%b %d, %Y",self.date)
else:
print time.strftime("%a %b %d %Y",self.date)
if __name__ == "__main__":
print "Welcome to the Date Formatter!"
month = raw_input("Please enter a month: ")
day = raw_input("Please enter a day: ")
year = raw_input("Please enter a year: ")
date_obj = date_format(month, day, year)
format_indicator = raw_input("Enter a format indicator: ")
date_obj.display(format_indicator.upper())
I am having trouble dealing with the case where the user actually types in a
month's name instead of the number:
[EMAIL PROTECTED] ./chap13 180> python date_format_v01.py
Welcome to the Date Formatter!
Please enter a month (as a number): Oct
Please enter a day: 31
Please enter a year: 1976
Traceback (most recent call last):
File "date_format_v01.py", line 53, in ?
date_obj = date_format(month, day, year)
File "date_format_v01.py", line 24, in __init__
if month.lower() in eachKey:
AttributeError: 'int' object has no attribute 'lower'
Any suggestions?
-Chris
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_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
