Is Jython the same language as Python?
Yes. Jython is an implementation of the Python language in Java. We strive to ensure that Jython remains as compatible with CPython as possible. The latest Jython release (2.2) implements the same language as CPython 2.2 and many of the CPython standard library modules. There are two incompatibilities with modern CPython that often catch newcomers. First, Jython 2.2 does not implement any features added to CPython in version 2.3 or later. This includes language features such as decorators, and library modules such as optparse. A more modern version of Jython is under active development. Second, Jython programs cannot use CPython extension modules written in C. These modules usually have files with the extension .pyc, .pyd or .dll. If you want to use such a module, you should look for an equivalent written in pure Python or Java. There are a number of other differences between the two implementations that are unlikely to go away. These range from the trivial – Jython’s code objects don’
