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Pandas Datetime: Convert given datetime to timestamp

Pandas Datetime: Exercise-9 with Solution

Write a Pandas program to convert given datetime to timestamp.

Sample Solution :

Python Code :

import pandas as pd
import datetime as dt
import numpy as np
df = pd.DataFrame(index=pd.DatetimeIndex(start=dt.datetime(2019,1,1,0,0,1),
   end=dt.datetime(2019,1,1,10,0,1), freq='H'))\
   .reset_index().rename(columns={'index':'datetime'})
print("Sample datetime data:")
print(df.head(10))
df['ts'] = df.datetime.values.astype(np.int64) // 10 ** 9
print("\nConvert datetime to timestamp:")
print (df)

Sample Output:

Sample datetime data:
             datetime
0 2019-01-01 00:00:01
1 2019-01-01 01:00:01
2 2019-01-01 02:00:01
3 2019-01-01 03:00:01
4 2019-01-01 04:00:01
5 2019-01-01 05:00:01
6 2019-01-01 06:00:01
7 2019-01-01 07:00:01
8 2019-01-01 08:00:01
9 2019-01-01 09:00:01

Convert datetime to timestamp:
              datetime          ts
0  2019-01-01 00:00:01  1546300801
1  2019-01-01 01:00:01  1546304401
2  2019-01-01 02:00:01  1546308001
3  2019-01-01 03:00:01  1546311601
4  2019-01-01 04:00:01  1546315201
5  2019-01-01 05:00:01  1546318801
6  2019-01-01 06:00:01  1546322401
7  2019-01-01 07:00:01  1546326001
8  2019-01-01 08:00:01  1546329601
9  2019-01-01 09:00:01  1546333201
10 2019-01-01 10:00:01  1546336801

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