khaotik opened a new issue #20405: URL: https://github.com/apache/incubator-mxnet/issues/20405
## Description A minor issue: `mx.numpy_extension.savez` does not accept array-dict with a key starting with slash. This started to occur as soon as I upgraded to master fork. It is also inconsistent with numpy behavior. This function is used by `gluon.Block.save_parameters` methods. ### Error Message ```text Traceback (most recent call last): File "test.py", line 12, in <module> mx.numpy_extension.savez('/tmp/m_mx', **{param_name:m}) File "/media/LNXDATA/WKSP/dev/incubator-mxnet/python/mxnet/numpy_extension/utils.py", line 122, in savez check_call(_LIB.MXNDArraySave(c_str(file), mx_uint(len(handles)), handles, keys)) File "/media/LNXDATA/WKSP/dev/incubator-mxnet/python/mxnet/base.py", line 246, in check_call raise get_last_ffi_error() mxnet.base.MXNetError: Traceback (most recent call last): File "/home/khaotik/WKSP/dev/incubator-mxnet/src/serialization/cnpy.cc", line 333 MXNetError: Check failed: mz_zip_writer_add_read_buf_callback(archive, blob_name_npy.data(), npy_header_blob_read_callback, static_cast<void*>(&callback_data), size_to_add, nullptr, nullptr, 0, MZ_NO_COMPRESSION, nullptr, 0, nullptr, 0): invalid filename ``` ## To Reproduce ```python #!/usr/bin/env python import numpy as np import mxnet as mx m_npy = np.random.rand(256,256).astype('float32') m = mx.ndarray.from_numpy(m_npy) param_name = '/op/m' # starts with a slash np.savez('/tmp/m_np', **{param_name:m_npy}) # WORKS mx.numpy_extension.savez('/tmp/m_mx', **{param_name:m}) # BROKEN ``` ## What have you tried to solve it? In file `python/mxnet/numpy_extension/utils.py`, substitute `NDArraySave` with `NDArrayLegacySave` provides a temp fix. Also, the issue can be avoided by not using slash as parameter name prefix. ## Environment ubuntu 20.04 anaconda py 3.8.3 mxnet master branch commit cb5bd4ea8b6fc9b568c13747bdb006ac047b72b5 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@mxnet.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@mxnet.apache.org For additional commands, e-mail: issues-h...@mxnet.apache.org