| What is Python? Executive Summary |
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| |
| Python is an interpreted, object-oriented, high-level programming |
| language with dynamic semantics. Its high-level built in data |
| structures, combined with dynamic typing and dynamic binding, make it |
| very attractive for rapid application development, as well as for use |
| as a scripting or glue language to connect existing components |
| together. Python's simple, easy to learn syntax emphasizes |
| readability and therefore reduces the cost of program maintenance. |
| Python supports modules and packages, which encourages program |
| modularity and code reuse. The Python interpreter and the extensive |
| standard library are available in source or binary form without charge |
| for all major platforms, and can be freely distributed. |
| |
| Often, programmers fall in love with Python because of the increased |
| productivity it provides. Since there is no compilation step, the |
| edit-test-debug cycle is incredibly fast. Debugging Python programs is |
| easy: a bug or bad input will never cause a segmentation fault. |
| Instead, when the interpreter discovers an error, it raises an |
| exception. When the program doesn't catch the exception, the |
| interpreter prints a stack trace. A source level debugger allows |
| inspection of local and global variables, evaluation of arbitrary |
| expressions, setting breakpoints, stepping through the code a line at |
| a time, and so on. The debugger is written in Python itself, |
| testifying to Python's introspective power. On the other hand, often |
| the quickest way to debug a program is to add a few print statements |
| to the source: the fast edit-test-debug cycle makes this simple |
| approach very effective. |