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ee9734 Niklas Polke 2026-08-03 23:19:16
Create Bytes Bytearray
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# Bytes Bytearray
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bytes/bytearray can contain numbers between 0 and 255
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## Overview
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| What | How |
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| - | - |
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| `bytes` | immutable byte sequence |
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| `bytes(10)` | create bytes of length 10 |
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| `bytes[0]` | get first byte |
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| - | - |
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| `bytearray` | mutable byte sequence |
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| `bytearray(10)` | create bytearray of length 10 |
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| `bytearray[0]` | get first byte |
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| - | - |
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| *bytes from bytearray* | `bytes(bytearray)` |
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| *bytearray from bytes* | `bytearray(bytes)` |
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| *copy from bytearrayOrBytes* | `bytearray(bytearrayOrBytes)` |
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handle both with one method:
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```python
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def method(data: bytearray | bytes): # accept both types
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mydata = bytearray(data) # copy of bytes or bytearray
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```