kopia lustrzana https://github.com/peterhinch/micropython-samples
29 wiersze
862 B
Markdown
29 wiersze
862 B
Markdown
# Overriding built in library modules
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Some firmware builds include library modules as frozen bytecode. On occasion it
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may be necessary to replace such a module with an updated or modified
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alternative. The most RAM-efficient solution is to rebuild the firmware with
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the replacement implemented as frozen bytecode.
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For users not wishing to recompile there is an alternative. The module search
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order is defined in `sys.path`.
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```
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>>> import sys
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>>> sys.path
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['', '/flash', '/flash/lib']
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```
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The `''` entry indicates that frozen modules will be found before those in the
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filesystem. This may be overridden by issuing:
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```
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>>> import sys
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>>> sys.path.append(sys.path.pop(0))
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```
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This has the following outcome:
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```
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>>> sys.path
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['/flash', '/flash/lib', '']
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```
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Now modules in the filesystem will be compiled and executed in preference to
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those frozen as bytecode.
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