Add Python code conventions to CODECONVENTIONS.
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Code conventions
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Python code conventions
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=======================
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When writing new code, please adhere to the following conventions.
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Python code follows [PEP 8](http://legacy.python.org/dev/peps/pep-0008/).
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Naming conventions:
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- Module names are short and all lowercase; eg pyb, stm.
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- Class names are CamelCase, with abreviations all uppercase; eg I2C, not
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I2c.
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- Function and method names are all lowercase with words separated by
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a single underscore as necessary to improve readability; eg mem_read.
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- Constants are all uppercase with words separated by a single underscore;
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eg GPIO_IDR.
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C code conventions
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==================
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When writing new C code, please adhere to the following conventions.
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White space:
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- Expand tabs to 4 spaces.
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@ -18,8 +32,10 @@ Braces:
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- For else-statements, put the else on the same line as the previous
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closing brace.
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Include directives:
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- Don't include within a header file.
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Header files:
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- Try to stick to the Plan 9 header style, where header files do not
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include other header files.
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- Don't protect a header file from multiple inclusion with #if directives.
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Type names and declarations:
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- When defining a type, put '_t' after it.
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