Error importing with 32-bit windows 7

[LMBooth]

Hi there,

I've been playing with antropy on my main home machine and have come to use the same code on a 32-bit windows 7 machine which has inccured an import error.

Currently using Python 3.8.10 32-bit. Can this be fixed or is it likely i'm in need of going to a 64-bit version?

The traceback is as follow:

Python 3.8.10 (tags/v3.8.10:3d8993a, May  3 2021, 11:34:34) [MSC v.1928 32 bit (
Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import antropy
Traceback (most recent call last):
  File "C:\Python38\lib\site-packages\numba\core\errors.py", line 776, in new_er
ror_context
    yield
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 235, in lowe
r_block
    self.lower_inst(inst)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 380, in lowe
r_inst
    val = self.lower_assign(ty, inst)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 556, in lowe
r_assign
    return self.lower_expr(ty, value)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 1084, in low
er_expr
    res = self.lower_call(resty, expr)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 815, in lowe
r_call
    res = self._lower_call_normal(fnty, expr, signature)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 1055, in _lo
wer_call_normal
    res = impl(self.builder, argvals, self.loc)
  File "C:\Python38\lib\site-packages\numba\core\base.py", line 1194, in __call_
_
    res = self._imp(self._context, builder, self._sig, args, loc=loc)
  File "C:\Python38\lib\site-packages\numba\core\base.py", line 1224, in wrapper

    return fn(*args, **kwargs)
  File "C:\Python38\lib\site-packages\numba\np\unsafe\ndarray.py", line 31, in c
odegen
    res = _empty_nd_impl(context, builder, arrty, shapes)
  File "C:\Python38\lib\site-packages\numba\np\arrayobj.py", line 3468, in _empt
y_nd_impl
    arrlen_mult = builder.smul_with_overflow(arrlen, s)
  File "C:\Python38\lib\site-packages\llvmlite\ir\builder.py", line 50, in wrapp
ed
    raise ValueError("Operands must be the same type, got (%s, %s)"
ValueError: Operands must be the same type, got (i32, i64)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python38\lib\site-packages\antropy\__init__.py", line 4, in <module>
    from .fractal import *
  File "C:\Python38\lib\site-packages\antropy\fractal.py", line 304, in <module>

    def _dfa(x):
  File "C:\Python38\lib\site-packages\numba\core\decorators.py", line 226, in wr
apper
    disp.compile(sig)
  File "C:\Python38\lib\site-packages\numba\core\dispatcher.py", line 979, in co
mpile
    cres = self._compiler.compile(args, return_type)
  File "C:\Python38\lib\site-packages\numba\core\dispatcher.py", line 141, in co
mpile
    status, retval = self._compile_cached(args, return_type)
  File "C:\Python38\lib\site-packages\numba\core\dispatcher.py", line 155, in _c
ompile_cached
    retval = self._compile_core(args, return_type)
  File "C:\Python38\lib\site-packages\numba\core\dispatcher.py", line 168, in _c
ompile_core
    cres = compiler.compile_extra(self.targetdescr.typing_context,
  File "C:\Python38\lib\site-packages\numba\core\compiler.py", line 686, in comp
ile_extra
    return pipeline.compile_extra(func)
  File "C:\Python38\lib\site-packages\numba\core\compiler.py", line 428, in comp
ile_extra
    return self._compile_bytecode()
  File "C:\Python38\lib\site-packages\numba\core\compiler.py", line 492, in _com
pile_bytecode
    return self._compile_core()
  File "C:\Python38\lib\site-packages\numba\core\compiler.py", line 471, in _com
pile_core
    raise e
  File "C:\Python38\lib\site-packages\numba\core\compiler.py", line 462, in _com
pile_core
    pm.run(self.state)
  File "C:\Python38\lib\site-packages\numba\core\compiler_machinery.py", line 34
3, in run
    raise patched_exception
  File "C:\Python38\lib\site-packages\numba\core\compiler_machinery.py", line 33
4, in run
    self._runPass(idx, pass_inst, state)
  File "C:\Python38\lib\site-packages\numba\core\compiler_lock.py", line 35, in
_acquire_compile_lock
    return func(*args, **kwargs)
  File "C:\Python38\lib\site-packages\numba\core\compiler_machinery.py", line 28
9, in _runPass
    mutated |= check(pss.run_pass, internal_state)
  File "C:\Python38\lib\site-packages\numba\core\compiler_machinery.py", line 26
2, in check
    mangled = func(compiler_state)
  File "C:\Python38\lib\site-packages\numba\core\typed_passes.py", line 396, in
run_pass
    lower.lower()
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 138, in lowe
r
    self.lower_normal_function(self.fndesc)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 192, in lowe
r_normal_function
    entry_block_tail = self.lower_function_body()
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 221, in lowe
r_function_body
    self.lower_block(block)
  File "C:\Python38\lib\site-packages\numba\core\lowering.py", line 235, in lowe
r_block
    self.lower_inst(inst)
  File "C:\Python38\lib\contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
  File "C:\Python38\lib\site-packages\numba\core\errors.py", line 786, in new_er
ror_context
    raise newerr.with_traceback(tb)
numba.core.errors.LoweringError: Failed in nopython mode pipeline (step: native
lowering)
Operands must be the same type, got (i32, i64)

File "lib\site-packages\antropy\fractal.py", line 313:
def _dfa(x):
    <source elided>

    for i_n, n in enumerate(nvals):
    ^

During: lowering "array.70 = call empty_func.71(size_tuple.69, func=empty_func.7
1, args=(Var(size_tuple.69, fractal.py:313),), kws=[], vararg=None, target=None)
" at C:\Python38\lib\site-packages\antropy\fractal.py (313)
>>>

[raphaelvallat]

Hi @LMBooth,

Thanks for opening the issue. I believe the source of the error is in the Numba source code and not AntroPy (see also similar issue here). Indeed, I do not define the integer type anywhere in the _dfa function:

antropy/antropy/fractal.py

Lines 303 to 336 in 96c28d2

	@jit('f8(f8[:])', nopython=True)
	def _dfa(x):
	"""
	Utility function for detrended fluctuation analysis
	"""
	N = len(x)
	nvals = _log_n(4, 0.1 * N, 1.2)
	walk = np.cumsum(x - x.mean())
	fluctuations = np.zeros(len(nvals))
	for i_n, n in enumerate(nvals):
	d = np.reshape(walk[:N - (N % n)], (N // n, n))
	ran_n = np.array([float(na) for na in range(n)])
	d_len = len(d)
	trend = np.empty((d_len, ran_n.size))
	for i in range(d_len):
	slope, intercept = _linear_regression(ran_n, d[i])
	trend[i, :] = intercept + slope * ran_n
	# Calculate root mean squares of walks in d around trend
	# Note that np.mean on specific axis is not supported by Numba
	flucs = np.sum((d - trend) ** 2, axis=1) / n
	# https://github.com/neuropsychology/NeuroKit/issues/206
	fluctuations[i_n] = np.sqrt(np.mean(flucs))
	# Filter zero
	nonzero = np.nonzero(fluctuations)[0]
	fluctuations = fluctuations[nonzero]
	nvals = nvals[nonzero]
	if len(fluctuations) == 0:
	# all fluctuations are zero => we cannot fit a line
	dfa = np.nan
	else:
	dfa, _ = _linear_regression(np.log(nvals), np.log(fluctuations))
	return dfa

Therefore, I'm not sure if there's anything we can do in the AntroPy source code to fix this 😬

Thanks,
Raphael

[LMBooth]

Thankyou for your hasty reply! I thought this may have been the case, Luckily it was whilst i was on a temporary machine so will not be a persistant issue for me.

I'll close the issue, thanks again!