Chapter 3. The Python Interpreter
To develop software systems in Python, you produce text files that contain Python source code and documentation. You can use any text editor, including those in Integrated Development Environments (IDEs). You then process the source files with the Python compiler and interpreter. You can do this directly, or implicitly inside an IDE, or via another program that embeds Python. The Python interpreter also lets you execute Python code interactively, as do IDEs.
The python Program
Python interpreter program is run as
python includes both the interpreter
itself and the Python compiler, which is implicitly invoked, as
needed, on imported modules. Depending on your system, the program
may have to be in a directory listed in your
.BAT file, shortcut target, etc.) that runs
it. On Windows, you can also use Start
→ Programs → Python 2.2
→ Python (command line).
environment variables affect the
Some environment variables have the same effects as options passed to
python on the command line; these are documented
in the next section. A few provide settings not available via
The Python installation directory. A
libsubdirectory, containing the standard Python ...