#範例5-10：串列/數組/列表，list的List Comprehension（綜合表達式，推導式）
#推導式功用：可以把一個list(a1)，經過推導式，轉寫成第二個list（a2)
#https://www.w3schools.com/python/python_lists_comprehension.asp


#list的迴圈有3種：
#語法1：a3 = a1 + a2
#語法2：a1.extend(a2)

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#1.找出有字母o的同學
#Example:
#Based on a list of fruits, you want a new list, containing only the fruits with the letter "a" in the name.
a1 = ["tom","john","mike","jolin"]


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#2.找出名字有王的同學
a1 = ["張三王","李四","王五","林九王"]



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#3.找出名字不是王五的其它的同學
a1 = ["張三王","李四","王五","林九王"]


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#4.找出名字不是王五,李四的其它的同學
a1 = ["張三王","李四","王五","林九王"]



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#5.將全部同學姓名，轉成大寫
a1 = ["tom","john","mike","jolin"]



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#6.把張三王，改成張三
a1 = ["張三王","李四","王五","林九王"]





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#7.產生數字資料1，2，3......10




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#8.產生數字資料0，2，3......9




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#範例5-10：串列/數組/列表，list的List Comprehension（綜合表達式，推導式）
#推導式功用：可以把一個list(a1)，經過推導式，轉寫成第二個list（a2)
#https://www.w3schools.com/python/python_lists_comprehension.asp


#list的迴圈有3種：
#語法1：a3 = a1 + a2
#語法2：a1.extend(a2)

#1.找出有字母o的同學
#Example:
#Based on a list of fruits, you want a new list, containing only the fruits with the letter "a" in the name.
a1 = ["tom","john","mike","jolin"]
a2 = [item for item in a1 if 'o' in item]
print(a2)


#2.找出名字有王的同學
a1 = ["張三王","李四","王五","林九王"]
a2 = [item for item in a1 if '王' in item]
print()
print(a2)

#3.找出名字不是王五的其它的同學
a1 = ["張三王","李四","王五","林九王"]
a2 = [item for item in a1 if item != "王五"]
print()
print(a2)

#4.找出名字不是王五,李四的其它的同學
a1 = ["張三王","李四","王五","林九王"]
a2 = [item for item in a1 if item != "王五" and item != "李四"]
print()
print(a2)


#5.將全部同學姓名，轉成大寫
a1 = ["tom","john","mike","jolin"]
a2 = [item.upper() for item in a1]
print()
print(a2)


#6.把張三王，改成張三
a1 = ["張三王","李四","王五","林九王"]
a2 = [item if item !="張三王" else "張三" for item in a1 ]
#The expression in the example above says:
#"Return the item if it is not banana, if it is banana return orange".
#如果item不等於張三王則傳回item，否則傳回張三
print()
print(a2)


#7.產生數字資料1，2，3......10
a1 = [i for i in range(1,11,1)]
print()
print(a1)


#8.產生數字資料0，2，3......9
a1 = [i for i in range(10)]
print()
print(a1)


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