NumPy: Convert numpy datetime64 to Timestamp
NumPy DateTime: Exercise-7 with Solution
Write a NumPy program to convert numpy datetime64 to Timestamp.
Sample Solution:-
Python Code:
import numpy as np
from datetime import datetime
dt = datetime.utcnow()
print("Current date:")
print(dt)
dt64 = np.datetime64(dt)
ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
print("Timestamp:")
print(ts)
print("UTC from Timestamp:")
print(datetime.utcfromtimestamp(ts))
Sample Output:
Current date: 2017-04-01 08:01:12.722055 Timestamp: 1491033672.72 UTC from Timestamp: 2017-04-01 08:01:12.722055
Pictorial Presentation:
Python-Numpy Code Editor:
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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")
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