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Pandas: Calculate all Thursdays between two given days

Pandas Time Series: Exercise-21 with Solution

Write a Pandas program to calculate all Thursdays between two given days.

Sample Solution:

Python Code :

import pandas as pd
thursdays  = pd.date_range('2020-01-01', 
                           '2020-12-31', freq="W-THU")
print("All Thursdays between 2020-01-01 and 2020-12-31:\n")
print(thursdays.values)

Sample Output:

All Thursdays between 2020-01-01 and 2020-12-31:

['2020-01-02T00:00:00.000000000' '2020-01-09T00:00:00.000000000'
 '2020-01-16T00:00:00.000000000' '2020-01-23T00:00:00.000000000'
 '2020-01-30T00:00:00.000000000' '2020-02-06T00:00:00.000000000'
 '2020-02-13T00:00:00.000000000' '2020-02-20T00:00:00.000000000'
 '2020-02-27T00:00:00.000000000' '2020-03-05T00:00:00.000000000'
 '2020-03-12T00:00:00.000000000' '2020-03-19T00:00:00.000000000'
 '2020-03-26T00:00:00.000000000' '2020-04-02T00:00:00.000000000'
 '2020-04-09T00:00:00.000000000' '2020-04-16T00:00:00.000000000'
 '2020-04-23T00:00:00.000000000' '2020-04-30T00:00:00.000000000'
 '2020-05-07T00:00:00.000000000' '2020-05-14T00:00:00.000000000'
 '2020-05-21T00:00:00.000000000' '2020-05-28T00:00:00.000000000'
 '2020-06-04T00:00:00.000000000' '2020-06-11T00:00:00.000000000'
 '2020-06-18T00:00:00.000000000' '2020-06-25T00:00:00.000000000'
 '2020-07-02T00:00:00.000000000' '2020-07-09T00:00:00.000000000'
 '2020-07-16T00:00:00.000000000' '2020-07-23T00:00:00.000000000'
 '2020-07-30T00:00:00.000000000' '2020-08-06T00:00:00.000000000'
 '2020-08-13T00:00:00.000000000' '2020-08-20T00:00:00.000000000'
 '2020-08-27T00:00:00.000000000' '2020-09-03T00:00:00.000000000'
 '2020-09-10T00:00:00.000000000' '2020-09-17T00:00:00.000000000'
 '2020-09-24T00:00:00.000000000' '2020-10-01T00:00:00.000000000'
 '2020-10-08T00:00:00.000000000' '2020-10-15T00:00:00.000000000'
 '2020-10-22T00:00:00.000000000' '2020-10-29T00:00:00.000000000'
 '2020-11-05T00:00:00.000000000' '2020-11-12T00:00:00.000000000'
 '2020-11-19T00:00:00.000000000' '2020-11-26T00:00:00.000000000'
 '2020-12-03T00:00:00.000000000' '2020-12-10T00:00:00.000000000'
 '2020-12-17T00:00:00.000000000' '2020-12-24T00:00:00.000000000'
 '2020-12-31T00:00:00.000000000']

Python Code Editor:


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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