We recently encountered a troubling problem with python.
Wondering if anybody can explain if this is a bug or feature.
array1 = ['a','b','c']
test = array1
del test[2]
print(test)
print(array1)
What would you guess the output is?
It is
['a', 'b']
['a', 'b']
How does the RHS take the value of the left? Thanks,
This is a feature of lists, when you say test= array1 (you are providing an alias to the list), you can reach the desired solution by slicing the list instead.
array1 = ['a','b','c']
test = array1[:]
del test[2]
print(test)
print(array1)
It is not a bug, it is a very knowable feature of python. If you want to copy a list you have 2 options: option1: you can make a shallow copy of the list by putting the RHS in list() constructor. option2: you can make a deep copy of the list by using the import copy module, and then using the deepcopy method.
