Nested dictionaries trouble

IamIan iansan at gmail.com
Fri Apr 20 01:35:42 CEST 2007


Thank you again for the great suggestions. I have one final question
about creating a httpMonths dictionary like {'Jan':'01' , 'Feb':'02' ,
etc} with a minimal amount of typing. My code follows (using Python
2.3.4):

import calendar

# Create years list, formatting as strings
years = map(str, xrange(1990,2051))

# Create months list with three letter abbreviations
months = list(calendar.month_abbr)

# Create monthTotals dictionary with default value of zero
monthTotals = dict.fromkeys(months[1:],0)

# Create yearTotals dictionary with years for keys
# and copies of the monthTotals dictionary for values
yearTotals = dict([(year, monthTotals.copy()) for year in years])

# Create httpMonths dictionary to map month abbreviations
# to Apache numeric month representations
httpMonths =
{"Jan":"01","Feb":"02","Mar":"03","Apr":"04","May":"05","Jun":"06","Jul":"07","Aug":"08","Sep":"09","Oct":"10","Nov":"11","Dec":"12"}

It is this last step I'm referring to. I got close with:
httpMonths = {}
for month in months[1:]:
  httpMonths[month] = str(len(httpMonths)+1)

but the month numbers are missing the leading zero for 01-09. Thanks!

Ian




More information about the Python-list mailing list