[issue29584] 2D list with Bugs when defined by using Multiplication

[Yaowei Zhang]

Changes by Yaowei Zhang :


--
components: Library (Lib)
nosy: Yaowei Zhang
priority: normal
severity: normal
status: open
title: 2D list with Bugs when defined by using Multiplication
versions: Python 3.5

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[issue29584] 2D list with Bugs when defined by using Multiplication

[Yaowei Zhang]

New submission from Yaowei Zhang:

#If we define a list by:
nums = [[0]*3]*3
#nums = [[0,0,0],[0,0,0],[0,0,0]]
nums[0][1] = 1
print(mums)
# the result is
[[0,1,0],[0,1,0],[0,1,0]]
#I think it is because all the line use the same list variable, but it suppose 
#not.

--
components: +Build -Library (Lib)
type:  -> behavior

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