1.兩種解釋器
CPython由C寫成；
Jython由Java寫成 ，特點包括
只要有 Java 虛擬機， 就能運行Jython
擁有訪問 Java 包與類庫的能力
爲 Java 開發環境提供了腳本引擎
能夠很容易的測試 Java 類庫
提供訪問 Java 原生異常處理的能力
繼承了 JavaBeans 特性和內省能力
鼓勵 Python 到Java 的開發（反之亦然）
GUI 開發人員可以訪問 Java 的 AWT/Swing 庫
利用了 Java 原生垃圾收集器（CPython 未實現此功能）
2.交互式解釋器
>>> primary prompt:expecting the next Python statement
...secondary prompt:indicates that the interpreter is waiting for additional input to complete the current statement
主提示符下，'''表示要輸入多行
次提示符下，輸入if statement 回車後，縮進 然後輸入執行語句 最後空行回車表示輸入完成
3.print用法
>>>print variable #輸出 variable content
>>>variables #輸出 'variable content'
>>>_ #last evaluated expression
logfile = open('/tmp/mylog.txt', 'a')
print >> logfile, 'Fatal error: invalid input!' #redirect output to file named logfile
logfile.close()
>>> user = raw_input('Enter login name: ')#built-in function to obtain user input from command line
Enter login name: root
>>> print 'Your login is:', user
Your login is: root # comma seperate two variables
>>>print"%s words %d" %("python",10)
循環中，print item會爲每一個item添加換行符，而print item, 則會用空格代替換行
4.Lists and Tuples
lists and tuples can store different types of objects.
Lists are enclosed in brackets ( [ ] ) and their elements and size can be changed. Tuples are
enclosed in parentheses ( ( ) ) and cannot be updated (although their contents may be). Tuples can be thought of for now as “read-only” lists.
>>> aList = [1, 2, 3, 4]
>>> aList
[1, 2, 3, 4]
>>> aList[0]
1
>>> aList[2:]
[3, 4]
>>> aList[:3]
[1, 2, 3]
>>> aList[1] = 5
>>> aList
[1, 5, 3, 4]
Slice access to a tuple is similar, except it cannot be modified:
>>> aTuple = ('robots', 77, 93, 'try')
>>> aTuple
('robots', 77, 93, 'try')
>>> aTuple[:3]
('robots', 77, 93)
>>> aTuple[1] = 5
Traceback (innermost last):
File "<stdin>", line 1, in ?
TypeError: object doesn't support item assignment