Possibly used before assignment pylint warning

[henryiii]

Vector Version

main

Python Version

Pylint

OS / Environment

Any

Describe the bug

This report is showing potentially problematic code:

************* Module vector.backends._numba_object
src/vector/backends/_numba_object.py:1502:12: E0606: Possibly using variable 'signature' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1510:31: E0606: Possibly using variable 'coord11' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1510:44: E0606: Possibly using variable 'coord12' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1510:57: E0606: Possibly using variable 'coord21' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1510:70: E0606: Possibly using variable 'coord22' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1520:24: E0601: Using variable 'coord13' before assignment (used-before-assignment)
src/vector/backends/_numba_object.py:1523:24: E0601: Using variable 'coord23' before assignment (used-before-assignment)
src/vector/backends/_numba_object.py:1534:24: E0601: Using variable 'coord14' before assignment (used-before-assignment)
src/vector/backends/_numba_object.py:1538:24: E0601: Using variable 'coord24' before assignment (used-before-assignment)
src/vector/backends/_numba_object.py:1663:12: E0606: Possibly using variable 'groupname' before assignment (possibly-used-before-assignment)
src/vector/backends/_numba_object.py:1665:12: E0606: Possibly using variable 'signature' before assignment (possibly-used-before-assignment)
************* Module vector.backends.numpy
src/vector/backends/numpy.py:190:19: E0606: Possibly using variable 'generic' before assignment (possibly-used-before-assignment)
src/vector/backends/numpy.py:369:28: E0606: Possibly using variable 'thisshape' before assignment (possibly-used-before-assignment)
************* Module vector._compute.lorentz.equal
src/vector/_compute/lorentz/equal.py:128:16: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/equal.py:129:19: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.add
src/vector/_compute/lorentz/add.py:121:17: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/add.py:122:17: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
src/vector/_compute/lorentz/add.py:157:16: E0601: Using variable 'to_tau' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.subtract
src/vector/_compute/lorentz/subtract.py:121:17: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/subtract.py:122:17: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
src/vector/_compute/lorentz/subtract.py:157:16: E0601: Using variable 'to_tau' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.isclose
src/vector/_compute/lorentz/isclose.py:161:16: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/isclose.py:162:16: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.boost_p4
src/vector/_compute/lorentz/boost_p4.py:735:16: E0606: Possibly using variable 'to_x' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/boost_p4.py:736:16: E0606: Possibly using variable 'to_y' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/boost_p4.py:737:16: E0601: Using variable 'to_z' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.boost_beta3
src/vector/_compute/lorentz/boost_beta3.py:349:16: E0606: Possibly using variable 'to_x' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/boost_beta3.py:350:16: E0606: Possibly using variable 'to_y' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/boost_beta3.py:351:16: E0601: Using variable 'to_z' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.dot
src/vector/_compute/lorentz/dot.py:115:12: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/dot.py:116:14: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.transform4D
src/vector/_compute/lorentz/transform4D.py:158:16: E0606: Possibly using variable 'to_x' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/transform4D.py:159:16: E0606: Possibly using variable 'to_y' before assignment (possibly-used-before-assignment)
src/vector/_compute/lorentz/transform4D.py:160:16: E0601: Using variable 'to_z' before assignment (used-before-assignment)
src/vector/_compute/lorentz/transform4D.py:161:16: E0601: Using variable 'to_t' before assignment (used-before-assignment)
************* Module vector._compute.lorentz.not_equal
src/vector/_compute/lorentz/not_equal.py:128:16: E0601: Using variable 'to_t1' before assignment (used-before-assignment)
src/vector/_compute/lorentz/not_equal.py:129:19: E0601: Using variable 'to_t2' before assignment (used-before-assignment)
************* Module vector._compute.spatial.cross
src/vector/_compute/spatial/cross.py:104:16: E0606: Possibly using variable 'to_x1' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/cross.py:105:16: E0606: Possibly using variable 'to_y1' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/cross.py:106:16: E0601: Using variable 'to_z1' before assignment (used-before-assignment)
src/vector/_compute/spatial/cross.py:107:16: E0606: Possibly using variable 'to_x2' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/cross.py:108:16: E0606: Possibly using variable 'to_y2' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/cross.py:109:16: E0601: Using variable 'to_z2' before assignment (used-before-assignment)
************* Module vector._compute.spatial.rotate_axis
src/vector/_compute/spatial/rotate_axis.py:123:16: E0606: Possibly using variable 'to_x1' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_axis.py:124:16: E0606: Possibly using variable 'to_y1' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_axis.py:125:16: E0601: Using variable 'to_z1' before assignment (used-before-assignment)
src/vector/_compute/spatial/rotate_axis.py:126:16: E0606: Possibly using variable 'to_x2' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_axis.py:127:16: E0606: Possibly using variable 'to_y2' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_axis.py:128:16: E0601: Using variable 'to_z2' before assignment (used-before-assignment)
************* Module vector._compute.spatial.rotate_euler
src/vector/_compute/spatial/rotate_euler.py:248:16: E0606: Possibly using variable 'to_x' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_euler.py:249:16: E0606: Possibly using variable 'to_y' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_euler.py:250:16: E0601: Using variable 'to_z' before assignment (used-before-assignment)
************* Module vector._compute.spatial.rotate_quaternion
src/vector/_compute/spatial/rotate_quaternion.py:95:16: E0606: Possibly using variable 'to_x' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_quaternion.py:96:16: E0606: Possibly using variable 'to_y' before assignment (possibly-used-before-assignment)
src/vector/_compute/spatial/rotate_quaternion.py:97:16: E0601: Using variable 'to_z' before assignment (used-before-assignment)

We should add assert statements at least to give nice errors on the branches where used-later variables are unset.

I've ignored the new check for now in #511.

Any additional but relevant log output

No response