python - Appending list elements to a symarray -


i'm trying add numpy arrays single array, code looks like:

m1=symarray('', 2) in range(0,len(countersum)):   if countersum[i]==1:     m1.append(gmcounter[i])

this give error

attributeerror: 'numpy.ndarray' object has no attribute 'append'

i have tried changing append vstack gives same error

if modify last line have m1=gcounter[i] works selects first element of gcounter meeting condition, , disregards afterwards.

does know how can resolve this?

i have seen thread append numpy array numpy array unable declare need append numpy array beforehand.

many thanks

@bakuriu correct, can not extend numpy array without copying. however, depending on application, can convert numpy array list , manipulate there:

m1 = sympy.symarray('', 2)  m2 = list(m1) x = sympy.symbols('x') m2.append(x)  print m2

this gives

>>> [_0, _1, x]

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