[Python_Bootcamp] Data Structures: List

이 글은 Dr. Angela Yu의 [Python_Bootcamp]를 수강하며 정리한 글입니다.

 

👉 기본 환경

- Language: Python

- IDE: Replit

 

 

Data Structures : List

Main Methods

list1 = ["a", "b", "c"]
list1.append("d")
# Add an item to the end of the list
print(list1)
# output: ['a', 'b', 'c', 'd']
 
 
list2 = [1, 2, 3]
# list2.extend(4);
# Extend the list by appending all the items from the iterable
# TypeError: 'int' object is not iterable
list2.extend("4")
print(list2)
# output: [1, 2, 3, '4']
 
 
list3 = ["ga", "na", "ra"]
list3.insert(2, "da")
# Insert an item at a given position.
print(list3)
# output: ['ga', 'na', 'da', 'ra']
 
 
list4 = ["do", "re", "mi"]
list4.remove("re")
# Remove the first item from the list whose value is equal to x.
# list4.remove("pa");
# ValueError: list.remove(x): x not in list
print(list4)
# output: ['do', 'mi']
 
 
list5 = ["a", "b", "c"]
list5.pop(1)
# Remove the item at the given position in the list, and return it.
# If no index is specified, a.pop() removes and returns the last item in the list.
print(list5)
# output: ['a', 'b']
 
 
list6 = [1, 2, 3]
list6.clear()
# Remove all items from the list.
print(list6)
# output: []
 
 
list7 = ["ga", "na", "ra", "na", "da", "ma", "ba", "na"]
index1 = list7.index("na")
# Return zero-based index in the list of the first item whose value is equal to x.
print(index1)
# output: 1
index2 = list7.index("na", 2)
# The optional arguments start and end are interpreted as in the slice notation and are used to limit the search to a particular subsequence of the list.
print(index2)
# output: 3
# index3 = list7.index("na", 5, 6);
# print(index3);
# ValueError: 'na' is not in list
 
 
list8 = ["do", "re", "mi", "mi"]
mi_cnt = list8.count("mi")
# Return the number of times x appears in the list.
print(mi_cnt)
# output: 2
 
 
list9 = ["1", "4", "3", "5", "2"]
list9.sort()
# Sort the items of the list in place.
print(list9)
# output: ['1', '2', '3', '4', '5']
list9.sort(reverse=True)
print(list9)
# output: ['5', '4', '3', '2', '1']
 
 
list10 = ["1", "4", "3", "5", "2"]
list10.reverse()
# Reverse the elements of the list in place.
print(list10)
# output: ['2', '5', '3', '4', '1']
 
 
list11 = ["apple", "banana", "car", "door", "elephant"];
list12 = list11.copy();
# Return a shallow copy of the list.
print(list12);
# output: ['apple', 'banana', 'car', 'door', 'elephant']
 

 

 

 

📚 참고 자료

5. Data Structures