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...all instances of a Python 2.X construct are incorrect in Python 3000, and most or all instances of the Python 3000 construct are incorrect in Python 2.X. So for example, changing the meaning of the for-loop else-clause from "executed when the loop was not broken out of" to "executed when the loop had zero iterations" would mean that all Python 2.X for-loop else-clauses would be broken, and there would be no way to use a for-loop else-clause in a Python-3000-appropriate manner. Thus a PEP for suc...
...all). The parser is not smart enough to backtrack once it sees the colon. This is my least favorite alternative. Extended Syntax There is one additional concern that needs to be addressed syntactically. Often two or more values need to be treated the same. In C, this done by writing multiple case labels together without any code between them. The "fall through" semantics then mean that these are all handled by the same code. Since the Python switch will not have fall-through semantics (w...
...ally to own Python-related Intellectual Property. Zope Corporation is a sponsoring member of the PSF. All Python releases are Open Source (see http://www.opensource.org for the Open Source Definition). Historically, most, but not all, Python releases have also been GPL-compatible; the table below summarizes the various releases. Release Derived Year Owner GPL- from compatible? (1) 0.9.0 thru 1.2 1...
...ally to own Python-related Intellectual Property. Zope Corporation is a sponsoring member of the PSF. All Python releases are Open Source (see http://www.opensource.org for the Open Source Definition). Historically, most, but not all, Python releases have also been GPL-compatible; the table below summarizes the various releases. Release Derived Year Owner GPL- from compatible? (1) 0.9.0 thru 1.2 ...