#切割部分
s = 'I love you more than i can say'
# 切割字串
# sep：指定按照什麼進行切割，預設按照空格切割
# maxsplit：指定最大切割次數，預設不限制次數
# ret = s.split(sep='abc', maxsplit=1)
# 從右邊進行切割
ret = s.rsplit(' ', maxsplit=7)#以空格切割
print(ret)
#等價於下面操作
s = 'I love you more than i can say'
ret = s.split()
print(ret)

s = 'Hello\nworld'
# 按照換行進行切割

print(s.splitlines())
 

s = 'I love you more than i can say'
ret = s.split()
print(ret)
#字串拼接
s2 = '*'.join(ret)
print(s2)#I*love*you*more*than*i*can*say

#查詢操作
s = 'Hi buddy, if you have something to say, than say; if you have nothing to say, than go.'

# 子串查詢：找到首次出現的位置，返回下標，找不到返回-1
ret = s.find('hello')
print(ret)#
 
-1
# 從後面查詢
ret = s.rfind('to')#70
print(ret)
print(s[70],s[71])#t o
# 統計子串出現的次數
ret = s.count('if')
print(ret)#2

#判斷部分
# 判斷是否已指定內容開頭

s = 'Hi buddy, if you have something to say, than say; if you have nothing to say, than go.'

ret = s.startswith('Hi')
print(ret)#True
# 判斷是否已指定內容結尾
ret 
 
= s.endswith('go.')
print(ret)#True

s = 'hellO worlD!'
# 轉換為全大寫
print(s.upper())#HELLO WORLD!
# 轉換為全小寫
print(s.lower())#hello world!
# 大小寫轉換
print(s.swapcase())#HELLo WORLd!
# 首字母大寫
print(s.capitalize())#Hello world!
# 每個單詞首字母大寫
print(s.title())#Hello World!
# 用指定的內容替換指定內容，還可以值替換次數
print(s.replace('l', 'L', 2))#heLLO worlD!

s = 'abcABC2'
# 是否是全大寫
print(s.isupper())#False
# 是否是全小寫
print(s.islower())#False
# 是否每個單詞首字母都大寫
print(s.istitle())#False
# 是否是全數字字元
print(s.isdecimal())#False
# 是否是全字母
print(s.isalpha())#False
# 是否全是字母或數字
print(s.isalnum())#False