[Python] Is there a simple way to delete a list element by value?

I want to remove a value from a list if it exists in the list (which it may not).

a = [1, 2, 3, 4]
b = a.index(6)

del a
print(a)


The above gives the error:

ValueError: list.index(x): x not in list


So I have to do this:

a = [1, 2, 3, 4]

try:
b = a.index(6)
del a
except:
pass

print(a)


But is there not a simpler way to do this?

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