劉任昌Python集合set清單list元組tuple字典dictionary

w3schools練習截圖

w3schools程式碼

#劉任昌集合set{},元組tuple(), 串列或清單list[],
#字典dict{key:value,鍵:值}
d = {2330:"台積電",2317:"鴻海",2454:"聯發科",6505:"台塑化"}
s = {"台積電", "鴻海", "聯發科","台塑化"}
t = ("台積電", "鴻海", "聯發科","台塑化")
list = ["台積電", "鴻海", "聯發科","台塑化"]
print(type(d),type(s),type(d),type(list))
print("台灣市場價值最大三家公司集合set列出")
print(s)
#練習迴圈
for a in s:
    print(a)
print("聯發科位置:" + str(t.index("聯發科")))
"""整個區塊註解前後加上連續三個引號, str將數字轉成字串 才能 和其他字串相接the set list is unordered, meaning: the items will appear in a random order.
# Refresh this page to see the change in the result.
"""

w3schools集合方法

Python has a set of built-in methods that you can use on sets.

Method	Description
add()	Adds an element to the set
clear()	Removes all the elements from the set
copy()	Returns a copy of the set
difference()	Returns a set containing the difference between two or more sets
difference_update()	Removes the items in this set that are also included in another, specified set
discard()	Remove the specified item
intersection()	Returns a set, that is the intersection of two other sets
intersection_update()	Removes the items in this set that are not present in other, specified set(s)
isdisjoint()	Returns whether two sets have a intersection or not
issubset()	Returns whether another set contains this set or not
issuperset()	Returns whether this set contains another set or not
pop()	Removes an element from the set
remove()	Removes the specified element
symmetric_difference()	Returns a set with the symmetric differences of two sets
symmetric_difference_update()	inserts the symmetric differences from this set and another
union()	Return a set containing the union of sets
update()	Update the set with the union of this set and others

w3schools串列或清單方法

Python has a set of built-in methods that you can use on lists.

Method	Description
append()	Adds an element at the end of the list
clear()	Removes all the elements from the list
copy()	Returns a copy of the list
count()	Returns the number of elements with the specified value
extend()	Add the elements of a list (or any iterable), to the end of the current list
index()	Returns the index of the first element with the specified value
insert()	Adds an element at the specified position
pop()	Removes the element at the specified position
remove()	Removes the item with the specified value
reverse()	Reverses the order of the list
sort()	Sorts the list

w3schools集合方法

Python has two built-in methods that you can use on tuples.

Method	Description
count()	Returns the number of times a specified value occurs in a tuple
index()	Searches the tuple for a specified value and returns the position of where it was found

教學影片

影片224

影片225

心得