Python: Find the elements in a given set that are not in another set
Python sets: Exercise-19 with Solution
Write a Python program to find the elements in a given set that are not in another set.
Sample Solution:
Python Code:
sn1 = {1,2,3,4,5}
sn2 = {4,5,6,7,8}
print("Original sets:")
print(sn1)
print(sn2)
print("Difference of sn1 and sn2 using difference():")
print(sn1.difference(sn2))
print("Difference of sn2 and sn1 using difference():")
print(sn2.difference(sn1))
print("Difference of sn1 and sn2 using - operator:")
print(sn1-sn2)
print("Difference of sn2 and sn1 using - operator:")
print(sn2-sn1)
Sample Output:
Original sets: {1, 2, 3, 4, 5} {4, 5, 6, 7, 8} Difference of sn1 and sn2 using difference(): {1, 2, 3} Difference of sn2 and sn1 using difference(): {8, 6, 7} Difference of sn1 and sn2 using - operator: {1, 2, 3} Difference of sn2 and sn1 using - operator: {8, 6, 7}
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Previous: Write a Python program to check if a given set is superset of itself and superset of another given set.
Next: Write a Python program to remove the intersection of a 2nd set from the 1st set.
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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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