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Python: Select all the Sundays of a specified year

Python Datetime: Exercise-15 with Solution

Write a Python program to select all the Sundays of a specified year.

Sample Solution:

Python Code:

from datetime import date, timedelta

def all_sundays(year):
# January 1st of the given year
       dt = date(year, 1, 1)
# First Sunday of the given year       
       dt += timedelta(days = 6 - dt.weekday())  
       while dt.year == year:
          yield dt
          dt += timedelta(days = 7)
          
for s in all_sundays(2020):
   print(s)
   

Sample Output:

2020-01-05                                                                                                    
2020-01-12                                                                                                    
2020-01-19                                                                                                    
2020-01-26                                                                                                    
2020-02-02     
-----
2020-12-06                                                                                                    
2020-12-13                                                                                                    
2020-12-20                                                                                                    
2020-12-27   

Flowchart:

Flowchart: Select all the Sundays of a specified year.

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Previous: Write a Python program to find the date of the first Monday of a given week.
Next: Write a program to add year(s) with a given date and display the new date.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m