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
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