Pandas: Sequences of fixed-frequency dates and time spans
Pandas Time Series: Exercise-23 with Solution
Write a Pandas program to generate sequences of fixed-frequency dates and time spans intervals.
Sample Solution:
Python Code :
import pandas as pd
print("Sequences of fixed-frequency dates and time spans (1 H):\n")
r1 = pd.date_range('2030-01-01', periods=10, freq='H')
print(r1)
print("\nSequences of fixed-frequency dates and time spans (3 H):\n")
r2 = pd.date_range('2030-01-01', periods=10, freq='3H')
print(r2)
Sample Output:
Sequences of fixed-frequency dates and time spans (1 H): DatetimeIndex(['2030-01-01 00:00:00', '2030-01-01 01:00:00', '2030-01-01 02:00:00', '2030-01-01 03:00:00', '2030-01-01 04:00:00', '2030-01-01 05:00:00', '2030-01-01 06:00:00', '2030-01-01 07:00:00', '2030-01-01 08:00:00', '2030-01-01 09:00:00'], dtype='datetime64[ns]', freq='H') Sequences of fixed-frequency dates and time spans (3 H): DatetimeIndex(['2030-01-01 00:00:00', '2030-01-01 03:00:00', '2030-01-01 06:00:00', '2030-01-01 09:00:00', '2030-01-01 12:00:00', '2030-01-01 15:00:00', '2030-01-01 18:00:00', '2030-01-01 21:00:00', '2030-01-02 00:00:00', '2030-01-02 03:00:00'], dtype='datetime64[ns]', freq='3H')
Python Code Editor:
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Previous: Write a Pandas program to find the all the business quarterly begin and end dates of a specified year.
Next: Write a Pandas program to generate time series combining day and intraday offsets intervals.
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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
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