#chp15.常用文字字串函數
#範例15-1：字串函數：基本篇
#https://www.w3schools.com/python/python_strings.asp
#https://www.w3school.com.cn/python/python_strings.asp

#觀念：python內定提供的重要文字基本函數有：
#（1）轉成大寫upper, 轉成小寫lower()， 文字長度len()
#（2）取代文字replace()，截取字串a1[開始編號:結束編號+1]
#（3）文字依據分隔符號轉成listsplit()


#1.----- 轉成大寫 a1.upper() ---------
#a1 = "how are you?"
#print(a1, "轉成大寫 = ")

#2.----- 轉成小寫 a1.lower() ---------
#a1 = "FINE, THANK YOU"
#print(a1, "轉成小寫 = ")

#3.----- 計算文字長度 len(a1) ---------
#a1 = "FINE, THANK YOU"
#print(a1, "的文字長度為 = ")


#4.----- 取代文字 a1.replace(舊字串, 新字串)---------
#a1 = "how are you?"
#print(a1, "取代how為where = ")


#5.----- 截取字串 a1[開始編號:結束編號+1]---------
#a1 = "how are you?"
#print(a1, "前3個字 = ")


#6.----- 截取字串 a1[開始編號:結束編號+1]---------
#a1 = "how are you?"
#print(a1, "最後3個字 = ")
#print(a1, "最後4個字 = ")
#print(a1, "最後4個字 = ")


#7.----- 多行的文字：使用3個雙引號/或單引號---------


#8.----- 刪除文字頭尾的空白: a1.strip()---------
#a1 = " how are you? "
print()

#9.----- 依據分隔符號（例如,)，將文字轉成list： a1.split()---------
#a1 = "john,tom,mike,jolin,peter"



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#chp15.常用文字字串函數
#範例15-1：字串函數：基本篇
#https://www.w3schools.com/python/python_strings.asp
#https://www.w3school.com.cn/python/python_strings.asp

#觀念：python內定提供的重要文字基本函數有：
#（1）轉成大寫upper, 轉成小寫lower()， 文字長度len()
#（2）取代文字replace()，截取字串a1[開始編號:結束編號+1]
#（3）文字依據分隔符號轉成listsplit()

#1.----- 轉成大寫 a1.upper() ---------
a1 = "how are you?"
print(a1, "轉成大寫 = ", a1.upper())

#2.----- 轉成小寫 a1.lower() ---------
a1 = "FINE, THANK YOU"
print(a1, "轉成小寫 = ", a1.lower())

#3.----- 計算文字長度 len(a1) ---------
a1 = "FINE, THANK YOU"
print(a1, "的文字長度為 = ", len(a1))


#4.----- 取代文字 a1.replace(舊字串, 新字串)---------
a1 = "how are you?"
print(a1, "取代how為where = ", a1.replace("how", "where"))


#5.----- 截取字串 a1[開始編號:結束編號+1]---------
a1 = "how are you?"
print(a1, "前3個字 = ", a1[0:3])


#6.----- 截取字串 a1[開始編號:結束編號+1]---------
a1 = "how are you?"
#print(a1, "最後3個字 = ", a1[-1:-4])
#print(a1, "最後4個字 = ", a1[-4:-1])
print(a1, "最後4個字 = ", a1[-4:])


#7.----- 多行的文字：使用3個雙引號/或單引號---------
a1 = """how are you?
Fine, thank you?
What is your name?
My name is peter."""
print(a1)


#8.----- 刪除文字頭尾的空白: a1.strip()---------
a1 = " how are you? "
print(a1.strip())

#9.----- 依據分隔符號（例如,)，將文字轉成list： a1.split()---------
a1 = "john,tom,mike,jolin,peter"
b1 = a1.split(',')
print(b1[0], b1[1])

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