rapidsai / cudf

cuDF - GPU DataFrame Library
https://docs.rapids.ai/api/cudf/stable/
Apache License 2.0
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[BUG] 'data_type_detection' for JSON does not handle '+' sign #6449

Closed kaatish closed 4 years ago

kaatish commented 4 years ago

Describe the bug If an integer/float is encountered in a json file with a minus sign before it, it is handled here and here. The minus sign is ignored and the remaining string is checked against the pattern of a float etc.

The same is not done for a '+' sign as it is done in the case of csv here.

Steps/Code to reproduce bug Create temp.json as : {"col0":10,"col1":+234}. Attempting to read the file with out = cudf.read_json('temp.json', lines=True) parses the second column as object.

In [6]: out.dtypes
Out[6]:
col0     int64
col1    object
dtype: object

Expected behavior out = cudf.read_json('temp.json', lines=True) should give :

In [6]: out.dtypes
Out[6]:
col0    int64
col1    int64
dtype: object

Environment overview

Click here to see environment details

     **git***
     Not inside a git repository

     ***OS Information***
     DISTRIB_ID=Ubuntu
     DISTRIB_RELEASE=20.04
     DISTRIB_CODENAME=focal
     DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"
     NAME="Ubuntu"
     VERSION="20.04.1 LTS (Focal Fossa)"
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     PRETTY_NAME="Ubuntu 20.04.1 LTS"
     VERSION_ID="20.04"
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     SUPPORT_URL="https://help.ubuntu.com/"
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     ***GPU Information***
     Tue Oct  6 16:23:09 2020
     +-----------------------------------------------------------------------------+
     | NVIDIA-SMI 450.51.06    Driver Version: 450.51.06    CUDA Version: 11.0     |
     |-------------------------------+----------------------+----------------------+
     | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
     | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
     |                               |                      |               MIG M. |
     |===============================+======================+======================|
     |   0  Quadro GV100        On   | 00000000:15:00.0 Off |                  Off |
     | 29%   40C    P2    26W / 250W |     11MiB / 32508MiB |      0%      Default |
     |                               |                      |                  N/A |
     +-------------------------------+----------------------+----------------------+
     |   1  Quadro GV100        On   | 00000000:2D:00.0  On |                  Off |
     | 37%   51C    P0    43W / 250W |   1141MiB / 32498MiB |      6%      Default |
     |                               |                      |                  N/A |
     +-------------------------------+----------------------+----------------------+

     +-----------------------------------------------------------------------------+
     | Processes:                                                                  |
     |  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
     |        ID   ID                                                   Usage      |
     |=============================================================================|
     |    0   N/A  N/A      1004      G   /usr/lib/xorg/Xorg                  4MiB |
     |    0   N/A  N/A      1689      G   /usr/lib/xorg/Xorg                  4MiB |
     |    1   N/A  N/A      1004      G   /usr/lib/xorg/Xorg                144MiB |
     |    1   N/A  N/A      1689      G   /usr/lib/xorg/Xorg                312MiB |
     |    1   N/A  N/A      1814      G   /usr/bin/gnome-shell              235MiB |
     |    1   N/A  N/A    171466      G   /usr/lib/firefox/firefox          102MiB |
     |    1   N/A  N/A    171520      G   /usr/lib/firefox/firefox          102MiB |
     |    1   N/A  N/A    173959      G   /usr/lib/firefox/firefox          102MiB |
     |    1   N/A  N/A    209695      G   kitty                               8MiB |
     |    1   N/A  N/A    304432      G   ...AAAAAAAAA= --shared-files       50MiB |
     +-----------------------------------------------------------------------------+

     ***CPU***
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     CPU op-mode(s):                  32-bit, 64-bit
     Byte Order:                      Little Endian
     Address sizes:                   46 bits physical, 48 bits virtual
     CPU(s):                          12
     On-line CPU(s) list:             0-11
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     Core(s) per socket:              6
     Socket(s):                       1
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     Vendor ID:                       GenuineIntel
     CPU family:                      6
     Model:                           85
     Model name:                      Intel(R) Xeon(R) Gold 6128 CPU @ 3.40GHz
     Stepping:                        4
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     L2 cache:                        6 MiB
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     Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT vulnerable
     Vulnerability Meltdown:          Mitigation; PTI
     Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
     Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
     Vulnerability Spectre v2:        Mitigation; Full generic retpoline, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
     Vulnerability Srbds:             Not affected
     Vulnerability Tsx async abort:   Mitigation; Clear CPU buffers; SMT vulnerable
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     /home/aatish/anaconda3/envs/cudf_dev/bin/cmake
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     ***nvcc***
     /usr/local/cuda-11.0/bin/nvcc
     nvcc: NVIDIA (R) Cuda compiler driver
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vuule commented 4 years ago

Don't think the repro code is right here. The file should be something like {"col0":10,"col1":+234} , and read_json should set lines parameter to True. Also, can you please run the same code with pandas.read_json to confirm that behavior is indeed unexpected.

vuule commented 4 years ago

Moved to P1 because Pandas does not support this case either.