Python: Generate a 3D array
Python List: Exercise - 13 with Solution
Write a Python program to generate a 3*4*6 3D array whose each element is *.
Pictorial Presentation:
Sample Solution:
Python Code:
array = [[ ['*' for col in range(6)] for col in range(4)] for row in range(3)]
print(array)
Sample Output:
[[['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', ' *', '*', '*', '*']], [['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*' , '*'], ['*', '*', '*', '*', '*', '*']], [['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*' , '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*']]]
Explanation:
array = [[ ['*' for col in range(6)] for col in range(4)] for row in range(3)]
In the above code -
- The outermost range(3) loop creates 3 outermost lists, which represent the first dimension of the 3D array.
- The second range(4) loop creates 4 sub-lists for each outermost list, representing the second dimension.
- The innermost range(6) loop creates 6 innermost lists for each sub-list, representing the third dimension.
- The ' * ' character is assigned to every element of the innermost list using the list comprehension.
So, the resulting array is a 3D array of size 3x4x6, with every element initialized to the character '*'.
Finally print() function prints the said array.
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Python: Tips of the Day
Given a predicate function, fn, and a prop string, this curried function will then take an object to inspect by calling the property and passing it to the predicate:
Example:
def tips_check_prop(fn, prop): return lambda obj: fn(obj[prop]) check_age = tips_check_prop(lambda x: x >= 25, 'age') user = {'name': 'Owen', 'age': 25} print(check_age(user))
Output:
True
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