codeop --- Compile Python code

Code source : Lib/codeop.py

The codeop module provides utilities upon which the Python read-eval-print loop can be emulated, as is done in the code module. As a result, you probably don't want to use the module directly; if you want to include such a loop in your program you probably want to use the code module instead.

Cette tâche se divise en deux parties :

  1. Being able to tell if a line of input completes a Python statement: in short, telling whether to print '>>>' or '...' next.

  2. Remembering which future statements the user has entered, so subsequent input can be compiled with these in effect.

The codeop module provides a way of doing each of these things, and a way of doing them both.

Pour ne faire que la première partie :

codeop.compile_command(source, filename='<input>', symbol='single')

Tries to compile source, which should be a string of Python code and return a code object if source is valid Python code. In that case, the filename attribute of the code object will be filename, which defaults to '<input>'. Returns None if source is not valid Python code, but is a prefix of valid Python code.

En cas de problème avec source, une exception est levée ; SyntaxError si la syntaxe Python est incorrecte, et OverflowError ou ValueError si un littéral invalide est rencontré.

The symbol argument determines whether source is compiled as a statement ('single', the default), as a sequence of statement ('exec') or as an expression ('eval'). Any other value will cause ValueError to be raised.

Note

Il est possible (quoique improbable) que l'analyseur s'arrête avant d'atteindre la fin du code source ; dans ce cas, les symboles venant après peuvent être ignorés au lieu de provoquer une erreur. Par exemple, une barre oblique inverse suivie de deux retours à la ligne peut être suivie par de la mémoire non-initialisée. Ceci sera corrigé quand l'interface de l'analyseur aura été améliorée.

class codeop.Compile

Instances of this class have __call__() methods identical in signature to the built-in function compile(), but with the difference that if the instance compiles program text containing a __future__ statement, the instance 'remembers' and compiles all subsequent program texts with the statement in force.

class codeop.CommandCompiler

Instances of this class have __call__() methods identical in signature to compile_command(); the difference is that if the instance compiles program text containing a __future__ statement, the instance 'remembers' and compiles all subsequent program texts with the statement in force.