Python sets methods explanation and visualization

Python sets methods

add()

Adds an element to the set.

smileys = {“😀”, “🙂”, “😉”, “🤩”}
smileys.add(“😇”)

# output
{‘😉’, ‘🙂’, ‘😀’, ‘🤩’, ‘😇’}

clear()

Removes all the elements from the set.

smileys = {“😀”, “🙂…


This content originally appeared on DEV Community and was authored by DEV Community

Python sets methods

add()

  • Adds an element to the set. 
smileys = {"😀", "🙂", "😉", "🤩"}
smileys.add("😇")

# output
{'😉', '🙂', '😀', '🤩', '😇'}

clear()

  • Removes all the elements from the set. 
smileys = {"😀", "🙂", "😉", "🤩"}
smileys.clear()

# output
set()

copy()

  • Returns a copy of the set. 
smileys = {"😀", "🙂", "😉", "🤩"}
x = smileys.copy()

# output
{'😀', '😉', '🙂', '🤩'}

difference()

  • Returns a set containing the difference between two or more sets. 
smileys = {"😀", "🙂", "😉", "🤩"}
emojis = {"😀", "🙂", "😉", "😍", "🤩", "😇"}
x = emojis.difference(smileys)

# output
{'😍', '😇'}

difference_update()

  • Removes the items in this set that are also included in another, specified set.
  • The difference_update() method is different from the difference() method, because the difference() method returns a new set.
  • without the unwanted items, and the difference_update() method removes the unwanted items from the original set. 
emojis = {"😀", "🙂", "😉", "😍", "🤩", "😇"}
smileys = {"😀", "🙂", "🤩"}
emojis.difference_update(smileys)

# output
{'😉', '😇', '😍'}

discard()

  • Remove the specified item. 
smileys = {"😀", "🙂", "😉", "🤩"}
smileys.discard("😉")

# output
{'😀', '🙂', '🤩'}

intersection()

  • Returns a set, that is the intersection of two or more sets. 
smileys = {"😀", "🙂", "😉", "🤩"}
emojis = {"😉", "😍", "😇"}

x = smileys.intersection(emojis)

# output
{'😉'}

intersection_update()

  • method removes the items that is not present in both sets (or in all sets if the comparison is done between more than two sets).
  • The intersection_update() method is different from the intersection() method, because the intersection() method returns a new set.
  • without the unwanted items, and the intersection_update() method removes the unwanted items from the original set. 
smileys = {"😀", "🙂", "😉", "🤩", "😇"}
emojis = {"😉", "😍", "😇"}

smileys.difference_update(emojis)

# output
{'🤩', '🙂', '😀'}

isdisjoint()

  • Returns whether two sets have a intersection or not 
smileys = {"😀", "🙂", "😇"}
emojis = {"😉", "😍", "🤩"}

x = smileys.isdisjoint(emojis)

# output
True

issubset()

  • method returns True if all items in the set exists in the specified set, otherwise it retuns False. 
smileys = {"😀", "🙂", "😇"}
emojis = {"😉", "😍", "🤩"}

x = smileys.issubset(emojis)

# output
False

pop()

  • Removes an element from the set.
  • Note: Because the set() is unordered we cannot ensure what element will be removed. 
smileys = {"😀", "🙂", "😉", "🤩", "😇"}
x = smileys.pop()

# output 1
🙂
# output 2
🤩
# output 3
😉

remove()

  • Removes the specified element. 
smileys = {"😀", "🙂", "😉", "🤩", "😇"}
smileys.remove("😉")

# output
{'😀', '🙂', '😇', '🤩'}

symmetric_difference()

  • method returns a set that contains all items from both set, but not the items that are present in both sets. -Meaning: The returned set contains a mix of items that are not present in both sets. 
smileys = {"😀", "🙂", "😉", "🤩", "😇"}
emojis = {"😉", "😍", "🤩"}

x = smileys.symmetric_difference(emojis)

# output
{'😇', '🙂', '😀', '😍'}

symmetric_difference_update()

  • method updates the original set by removing items that are present in both sets, and inserting the other items. 
smileys = {"😀", "🙂", "😉", "🤩", "😇"}
emojis = {"😉", "😍", "🤩", "😇"}

smileys.symmetric_difference_update(emojis)

# output
{'😍', '🙂', '😀'}

union()

  • method returns a set that contains all items from the original set, and all items from the specified set(s).
  • Note: It will remove the same element from the original set. 
smileys = {"😀", "🙂", "😇", "😉"}
emojis = {"😉", "😍", "🤩", "😇"}

x = smileys.union(emojis)

# output
{'😇', '😉', '😀', '🙂', '😍', '🤩'}

update()

  • method updates the current set, by adding items from another set (or any other iterable). 
smileys = {"😀", "🙂"}
emojis = {"😉", "😍", "🤩", "😇"}

smileys.update(emojis)

# output
{'😍', '🙂', '🤩', '😇', '😉', '😀'}

All the best to you.


This content originally appeared on DEV Community and was authored by DEV Community


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