NumPy: Test digits only, lower case and upper case letters only
NumPy String: Exercise-17 with Solution
Write a NumPy program to check whether each element of a given array is composed of digits only, lower case letters only and upper case letters only.
Sample Solution:-
Python Code:
import numpy as np
x = np.array(['Python', 'PHP', 'JS', 'Examples', 'html5', '5'], dtype=np.str)
print("\nOriginal Array:")
print(x)
r1 = np.char.isdigit(x)
r2 = np.char.islower(x)
r3 = np.char.isupper(x)
print("Digits only =", r1)
print("Lower cases only =", r2)
print("Upper cases only =", r3)
Sample Input:
(['Python', 'PHP', 'JS', 'Examples', 'html5', '5'], dtype=np.str)
Sample Output:
Original Array: ['Python' 'PHP' 'JS' 'Examples' 'html5' '5'] Digits only = [False False False False False True] Lower cases only = [False False False False True False] Upper cases only = [False True True False False False]
Pictorial Presentation:
Python-Numpy 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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