-- 變數  message = "hello python word" print(message)
-- 練習 
vi simple_message.py #!/usr/bin/python3.4 message = "hello python crash cousor reader!" print(message)
vi simple_messages.py messages = "AAAAAA  hello python crash cousor reader!" print(messages) messages = "BBBBBBB  hello python crash cousor reader!" print(messages)
-- 首字母大寫 全部轉換為大寫 小寫 name = "habby yang" print(name.title()) print(name.upper()) print(name.lower())
-- 連線字串 fisrt_name = "king" middle_name = "of" last_name = "pop" full_name = fisrt_name + " " + middle_name + " " + last_name print(full_name)
-- \t 製表符 \n 換行 print("python") print("\tpython") print("\npython") print("\npython\n") print("languages:\n\tPython\n\tC\n\tJavascript")
-- 刪除空白 rstrip()  只能去除開頭和結尾的空白  左側 lstrip() 右側 rstrip() habby="         aaa bbb ccc      " habby.lstrip() habby.rstrip() habby.lstrip().rstrip()

-- 下面的語句在 Python 3 不能執行 只能在 Python 2 中執行  因為 Python3 將 print() 作為一個函式使用 不能直接列印內容 但是  name.print() 也是不能成功執行的 print "habby" name = 'habby_yang' name.print()

name = "habby yang" world1 = "hello" + " " + name + ",would you like to learn some python today?" world2 = "hello" + " " + name.title() + ",would you like to learn some python today?" world3 = "hello" + " " + name.upper() + ",would you like to learn some python today?" world4 = "hello" + " " + name.lower() + ",would you like to learn some python today?" print(world1) print(world2) print(world3) print(world4)
print("\n",world1,"\n",world2,"\n",world3,"\n",world4)
>>> print("\n",world1,"\n",world2,"\n",world3,"\n",world4)
 hello habby yang,would you like to learn some python today?  hello Habby Yang,would you like to learn some python today?  hello HABBY YANG,would you like to learn some python today?  hello habby yang,would you like to learn some python today?
myworld = 'I said,"my action brings my confidence!"' print(myworld)
-- 數字的字元轉換函式 age = 23 message = "happy " + str(age) + "rd BirsthDay!" print(message)

print(4+4) print(12-4) print(2*4) print(24/3)
age =  31 message = "happy,you are  " + str(age) + " years old!" print(message)