23 lines
555 B
Markdown
23 lines
555 B
Markdown
---
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title: Initialize 2D list
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type: snippet
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language: python
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tags: [list]
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cover: succulent-7
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dateModified: 2020-11-02T19:28:05+02:00
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---
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Initializes a 2D list of given width and height and value.
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- Use a list comprehension and `range()` to generate `h` rows where each is a list with length `h`, initialized with `val`.
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- Omit the last argument, `val`, to set the default value to `None`.
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```py
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def initialize_2d_list(w, h, val = None):
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return [[val for x in range(w)] for y in range(h)]
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```
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```py
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initialize_2d_list(2, 2, 0) # [[0, 0], [0, 0]]
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```
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