Python generates calendar instance resolution

This article demonstrates an example of how to implement a Python generated calendar. This example implements a calendar for a month to generate a 5x7 list of datetime dates, using python's built-in calendar module.

The results of the program are as follows:

python test.py 2014 09 
2014-08-31 2014-09-01 2014-09-02 2014-09-03 2014-09-04 2014-09-05 2014-09-06 
2014-09-07 2014-09-08 2014-09-09 2014-09-10 2014-09-11 2014-09-12 2014-09-13 
2014-09-14 2014-09-15 2014-09-16 2014-09-17 2014-09-18 2014-09-19 2014-09-20 
2014-09-21 2014-09-22 2014-09-23 2014-09-24 2014-09-25 2014-09-26 2014-09-27 
2014-09-28 2014-09-29 2014-09-30 2014-10-01 2014-10-02 2014-10-03 2014-10-04 

The python code is as follows:

#coding:utf-8
# Last modified: 2014-08-21 11:08:08 
import calendar 
import datetime 
import sys 
 
def getcal(y, m): 
 #  Starting Sunday  
 cal = calendar.Calendar(6) 
 if not isinstance(y, int): y = int(y) 
 if not isinstance(m, int): m = int(m) 
 if m == 1: # 1 in  
  py = y - 1; pm = 12; 
  ny = y; nm = 2 
 elif m == 12: # 12 in  
  py = y; pm = 11 
  ny = y + 1; nm = 1 
 else: 
  py = y; pm = m - 1 
  ny = y; nm = m + 1 
 pcal = cal.monthdayscalendar(py, pm) #  On January  
 ncal = cal.monthdayscalendar(ny, nm) #  Next month  
 ccal = cal.monthdayscalendar(y, m)  #  The current  
 w1 = ccal.pop(0) #  Take the first week  
 w2 = ccal.pop() #  Last week  
 wp = pcal.pop() #  Last week of last month  
 wn = ncal.pop(0) #  The first week of next month  
 #r1 = [datetime.date(y, m ,w1[i]) or wp[i] for i in range(7)] 
 r1 = [w1[i] and datetime.date(y, m, w1[i]) or datetime.date(py, pm, wp[i]) for i in range(7)] 
 r2 = [w2[i] and datetime.date(y, m, w2[i]) or datetime.date(ny, nm, wn[i]) for i in range(7)] 
 #  turn datetime 
 result = [] 
 result.append(r1) #  The first week  
 for c in ccal:  #  The other week  
  result.append([datetime.date(y,m,i) for i in c]) 
 result.append(r2) #  The last week  
 return result 
 
if __name__ == '__main__': 
 for w in getcal(sys.argv[1], sys.argv[2]): 
  for d in w: 
   print d, 
  print 

I hope the examples described in this article are helpful for your Python programming.