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| 55 | <H1><A NAME="SECTION0021000000000000000000"></A><A NAME="compiler"></A> |
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| 57 | 19. Python compiler package |
| 58 | </H1> |
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| 60 | <P> |
| 61 | |
| 62 | <P> |
| 63 | The Python compiler package is a tool for analyzing Python source code |
| 64 | and generating Python bytecode. The compiler contains libraries to |
| 65 | generate an abstract syntax tree from Python source code and to |
| 66 | generate Python bytecode from the tree. |
| 67 | |
| 68 | <P> |
| 69 | The <tt class="module"><a href="module-compiler.html">compiler</a></tt> package is a Python source to bytecode |
| 70 | translator written in Python. It uses the built-in parser and |
| 71 | standard <tt class="module"><a href="module-parser.html">parser</a></tt> module to generated a concrete syntax |
| 72 | tree. This tree is used to generate an abstract syntax tree (AST) and |
| 73 | then Python bytecode. |
| 74 | |
| 75 | <P> |
| 76 | The full functionality of the package duplicates the builtin compiler |
| 77 | provided with the Python interpreter. It is intended to match its |
| 78 | behavior almost exactly. Why implement another compiler that does the |
| 79 | same thing? The package is useful for a variety of purposes. It can |
| 80 | be modified more easily than the builtin compiler. The AST it |
| 81 | generates is useful for analyzing Python source code. |
| 82 | |
| 83 | <P> |
| 84 | This chapter explains how the various components of the |
| 85 | <tt class="module"><a href="module-compiler.html">compiler</a></tt> package work. It blends reference material with |
| 86 | a tutorial. |
| 87 | |
| 88 | <P> |
| 89 | The following modules are part of the <tt class="module"><a href="module-compiler.html">compiler</a></tt> package: |
| 90 | |
| 91 | <P> |
| 92 | <table class='synopsistable' valign='baseline'> |
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| 94 | <td><b><tt class='module'><a href='module-compiler.html'>compiler</a></tt></b></td> |
| 95 | <td> </td> |
| 96 | <td class='synopsis'></td></tr> |
| 97 | <tr><td><b><tt class='module'><a href='module-compiler.ast.html'>compiler.ast</a></tt></b></td> |
| 98 | <td> </td> |
| 99 | <td class='synopsis'></td></tr> |
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| 101 | <td><b><tt class='module'><a href='module-compiler.visitor.html'>compiler.visitor</a></tt></b></td> |
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