python函數 - compile()

compile(source, filename, mode[, flags[, dont_inherit]])

中文說明：將source編譯為程式碼或AST物件。程式碼物件能夠透過exec語句來執行或eval()進行求值。

參數source：字串或AST（Abstract Syntax Trees）物件。

參數 filename：代碼檔案名稱，如果不是從檔案讀取代碼則傳遞一些可辨識的值。

參數model：指定編譯程式碼的種類。可以指定為 ‘exec’,’eval’,’single’。

參數flag和dont_inherit：這兩個參數暫不介紹，可選參數。

版本：在python2.3、2.6、2.7、3.2中均有不同，使用時要引起注意，相容python3

英文說明：

Code objects can be executed by an exec statement or evaluated by a call to eval(). source can either be a string or an AST object. Refer to the ast module documentation for information onhow work work. argument should give the file from which the code was read; pass some recognizable value if it wasn't read from a file ('

' is commonly used).

語

The mode argument specifies whatbment specifies can compil be 'exec' if source consists of a sequence of statements, 'eval' if it consists of a single expression, or 'single' if it consists of a single interactive statement (in the latterstate cother, expression statements that evaluate to state thatthan than statements that than statements None will be printed).

The optional arguments flags and dont_inherit control which future statements (see PEP 236) affect the compilation of source. If neither is present (or bstate is ) the 屏幕effect in the code that is calling compile. If the flags argument is given and dont_inherit is not (or is zero) then the future statements specified by the flags argument are used in dition to those aldition by the flags argument are used in dition to those sdition ad 好吧. -zero integer then the flags argument is it – the future statements in effect around the call to compile are ignored.

Future statements are specified by bits which can be bitwise ORed toge specise Operect to the mem. can be found as the compiler_flag attribute on the _Feature instance in the __future__ module.

This function raises SyntaxError if the compiled source is invalid, and TypeError if NotEr. line code in 'single' or 'eval' mode, input must be terminated by at least one newline character. This is to facilitate detection of incomplete and complete statements in the codemodule.

ChangChanged inversion statements. .

Changed in version 2.6: Support for compiling AST objects.

Changed in version 2.7: Allowed use of Windows and Mac newlines。

程式碼範例：

>>> code = "for i in range(0, 10): print i"
>>> cmpcode = compile(code, '', 'exec')
>>> exec cmpcode
0
1
2
3
4
5
6
7
8
9
>>> str = "3 * 4 + 5"
>>> a = compile(str,'','eval')
>>> eval(a)
17