An idiom for code generation with exec

eliben eliben at gmail.com
Mon Jun 23 06:44:55 CEST 2008


Thanks for all the replies in this post. Just to conclude, I want to
post a piece of code I wrote to encapsulate function creation in this
way:

def create_function(code):
    """ Create and return the function defined in code.
    """
    m = re.match('\s*def\s+([a-zA-Z_]\w*)\s*\(', code)
    if m:
        func_name = m.group(1)
    else:
        return None

    d = {}
    exec code.strip() in globals(), d
    return d[func_name]

Although the 'def' matching in the beginning looks a bit shoddy at
first, it should work in all cases.

Eli







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