# Name: CDate.py
# Purpose: Date and Calendar classes
#
# Author: Lorne White (email: lwhite1@planet.eon.net)
#
# Created:
# Version 0.2 08-Nov-1999
# Licence: wxWindows license
#----------------------------------------------------------------------------
# Updated: 01-Dec-2004
# Action: Cast the year variable to an integer under the Date Class
# Reason: When the year was compared in the isleap() function, if it was
# in a string format, then an error was raised.
import time
Month = {2: 'February', 3: 'March', None: 0, 'July': 7, 11:
'November', 'December': 12, 'June': 6, 'January': 1, 'September': 9,
'August': 8, 'March': 3, 'November': 11, 'April': 4, 12: 'December',
'May': 5, 10: 'October', 9: 'September', 8: 'August', 7: 'July', 6:
'June', 5: 'May', 4: 'April', 'October': 10, 'February': 2, 1:
'January', 0: None}
# Number of days per month (except for February in leap years)
mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
# Full and abbreviated names of weekdays
day_name = [ 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
day_abbr = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', ]
# Return number of leap years in range [y1, y2)
# Assume y1 <= y2 and no funny (non-leap century) years
def leapdays(y1, y2):
return (y2+3)/4 - (y1+3)/4
# Return 1 for leap years, 0 for non-leap years
def isleap(year):
return year % 4 == 0 and (year % 100 <> 0 or year % 400 == 0)
def FillDate(val):
s = str(val)
if len(s) < 2:
s = '0' + s
return s
def julianDay(year, month, day):
b = 0L
year, month, day = long(year), long(month), long(day)
if month > 12L:
year = year + month/12L
month = month%12
elif month < 1L:
month = -month
year = year - month/12L - 1L
month = 12L - month%12L
if year > 0L:
yearCorr = 0L
else:
yearCorr = 3L
if month < 3L:
year = year - 1L
month = month + 12L
if year*10000L + month*100L + day > 15821014L:
b = 2L - year/100L + year/400L
return (1461L*year - yearCorr)/4L + 306001L*(month + 1L)/10000L + day + 1720994L + b
def TodayDay():
date = time.localtime(time.time())
year = date[0]
month = date[1]
day = date[2]
julian = julianDay(year, month, day)
daywk = dayOfWeek(julian)
daywk = day_name[daywk]
return(daywk)
def FormatDay(value):
date = FromFormat(value)
daywk = DateCalc.dayOfWeek(date)
daywk = day_name[daywk]
return(daywk)
def FromJulian(julian):
julian = long(julian)
if (julian < 2299160L):
b = julian + 1525L
else:
alpha = (4L*julian - 7468861L)/146097L
b = julian + 1526L + alpha - alpha/4L
c = (20L*b - 2442L)/7305L
d = 1461L*c/4L
e = 10000L*(b - d)/306001L
day = int(b - d - 306001L*e/10000L)
if e < 14L:
month = int(e - 1L)
else:
month = int(e - 13L)
if month > 2:
year = c - 4716L
else:
year = c - 4715L
year = int(year)
return year, month, day
def dayOfWeek(julian):
return int((julian + 1L)%7L)
def daysPerMonth(month, year):
ndays = mdays[month] + (month == 2 and isleap(year))
return ndays
class now:
def __init__(self):
self.date = time.localtime(time.time())
self.year = self.date[0]
self.month = self.date[1]
self.day = self.date[2]
class Date:
def __init__(self, year, month, day):
self.julian = julianDay(year, month, day)
self.month = month
self.year = int(year)
self.day_of_week = dayOfWeek(self.julian)
self.days_in_month = daysPerMonth(self.month, self.year)
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