Author Archives: Robins

[Solved] Jupyter notebook: TypeError: __init__() got an unexpected keyword argument ‘io_loop’

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When opening a Python file today, an error message was reported:
TypeError: __init__() got an unexpected keyword argument’io_loop’
Obviously it is a file copied from the old computer to the new computer. The previous operation was OK. Why did it report an error when running on the new computer?
wrong reason:
When configuring the python environment, the default tornado version is the latest version (it happens that my new computer reconfigured the python environment, so I installed the latest version), but the io_loop parameter was discarded after version 4.0.
solution:
1. First uninstall the currently installed tornado
pip uninstall tornado
2. Install the lower version of tornado
pip install tornado==4.1
After the installation is successful, re-execute the python file and it can run normally

The solution of no module named ‘jinja2. Asyncsupport’

Background of the problem

When compiling Px4,

make px4_sitl_default gazebo

An error has been reported,

[0/535] Performing build step for 'sitl_gazebo'
[1/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/mb1240-xl-ez4/mb1240-xl-ez4-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/mb1240-xl-ez4/mb1240-xl-ez4-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/mb1240-xl-ez4/mb1240-xl-ez4.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[2/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/pixhawk/pixhawk-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/pixhawk/pixhawk-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/pixhawk/pixhawk.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[3/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/matrice_100/matrice_100-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/matrice_100/matrice_100-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/matrice_100/matrice_100.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[4/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/r200/r200-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/r200/r200-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/r200/r200.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[5/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/c920/c920-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/c920/c920-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/c920/c920.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[6/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/px4flow/px4flow-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/px4flow/px4flow-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/px4flow/px4flow.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[7/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/3DR_gps_mag/3DR_gps_mag-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/3DR_gps_mag/3DR_gps_mag-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/3DR_gps_mag/3DR_gps_mag.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[8/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/sf10a/sf10a-gen.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/sf10a/sf10a-gen.sdf 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/sf10a/sf10a.sdf.jinja /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo
Traceback (most recent call last):
  File "/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/jinja_gen.py", line 4, in <module>
    import jinja2
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 82, in <module>
    _patch_async()
  File "/usr/lib/python2.7/dist-packages/jinja2/__init__.py", line 78, in _patch_async
    from jinja2.asyncsupport import patch_all
ModuleNotFoundError: No module named 'jinja2.asyncsupport'
[9/9] Generating /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/iris/iris.sdf
FAILED: /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/iris/iris.sdf 
cd /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo && rm -f /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/iris/iris.sdf && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/scripts/xacro.py -o /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/rotors_description/urdf/iris_base.urdf /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/rotors_description/urdf/iris_base.xacro enable_mavlink_interface:=true enable_ground_truth:=false enable_wind:=false enable_logging:=false rotors_description_dir:=/home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/rotors_description send_vision_estimation:=true send_odometry:=false && gz sdf -p /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/rotors_description/urdf/iris_base.urdf >> /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/iris/iris.sdf && rm -f /home/zth/catkin_ws/Firmware/Tools/sitl_gazebo/models/rotors_description/urdf/iris_base.urdf

gz: symbol lookup error: /usr/lib/x86_64-linux-gnu/libgazebo_common.so.9: undefined symbol: _ZN8ignition10fuel_tools12ClientConfig12SetUserAgentERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
ninja: build stopped: subcommand failed.
[2/535] Generating mixer_multirotor.generated.h
FAILED: src/lib/mixer/MultirotorMixer/mixer_multirotor.generated.h 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/src/lib/mixer/MultirotorMixer && /usr/bin/python3 /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tools/px_generate_mixers.py -f /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_bottom_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_top_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_t.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_deadcat.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_h.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_s250aq.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_vtail.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_cw.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_pusher.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tri_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/twin_engine.toml -o mixer_multirotor.generated.h
Failed to import numpy: 
Importing the multiarray numpy extension module failed.  Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control).  Otherwise reinstall numpy.

Original error was: cannot import name 'multiarray'


You may need to install it using:
    pip3 install --user numpy

[3/535] Generating mixer_multirotor_normalized.generated.h
FAILED: src/lib/mixer/MultirotorMixer/mixer_multirotor_normalized.generated.h 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/src/lib/mixer/MultirotorMixer && /usr/bin/python3 /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tools/px_generate_mixers.py --normalize -f /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_bottom_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_top_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_t.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_deadcat.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_h.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_s250aq.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_vtail.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_cw.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_pusher.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tri_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/twin_engine.toml -o mixer_multirotor_normalized.generated.h
Failed to import numpy: 
Importing the multiarray numpy extension module failed.  Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control).  Otherwise reinstall numpy.

Original error was: cannot import name 'multiarray'


You may need to install it using:
    pip3 install --user numpy

[4/535] Generating mixer_multirotor_6dof.generated.h
FAILED: src/lib/mixer/MultirotorMixer/mixer_multirotor_6dof.generated.h 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/src/lib/mixer/MultirotorMixer && /usr/bin/python3 /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tools/px_generate_mixers.py --sixdof -f /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_bottom_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/dodeca_top_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_t.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/hex_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_cox_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/octa_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_deadcat.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_h.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_plus.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_s250aq.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_vtail.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_wide.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_cw.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_x_pusher.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/quad_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/tri_y.toml /home/zth/catkin_ws/Firmware/src/lib/mixer/MultirotorMixer/geometries/twin_engine.toml -o mixer_multirotor_6dof.generated.h
Failed to import numpy: 
Importing the multiarray numpy extension module failed.  Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control).  Otherwise reinstall numpy.

Original error was: cannot import name 'multiarray'


You may need to install it using:
    pip3 install --user numpy

[5/535] Generating serial_params.c
FAILED: generated_params/serial_params.c 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/src/lib/parameters && /usr/bin/cmake -E make_directory /home/zth/catkin_ws/Firmware/build/px4_sitl_default/generated_params && /usr/bin/python3 /home/zth/catkin_ws/Firmware/Tools/serial/generate_config.py --params-file /home/zth/catkin_ws/Firmware/build/px4_sitl_default/generated_params/serial_params.c --serial-ports --config-files /home/zth/catkin_ws/Firmware/src/lib/battery/module.yaml /home/zth/catkin_ws/Firmware/src/drivers/gps/module.yaml /home/zth/catkin_ws/Firmware/src/modules/mavlink/module.yaml
Failed to import jinja2: No module named 'jinja2.asyncsupport'

You may need to install it using:
    pip3 install --user jinja2

FAILED: external/Stamp/sitl_gazebo/sitl_gazebo-build 
cd /home/zth/catkin_ws/Firmware/build/px4_sitl_default/build_gazebo && /usr/bin/cmake --build .
ninja: build stopped: subcommand failed.
Makefile:198: recipe for target 'px4_sitl_default' failed
make: *** [px4_sitl_default] Error 1

The first mistake is:

ModuleNotFoundError: No module named 'jinja2.asyncsupport'

Solution process:

1. Install jinja2 according to the command given in the error prompt:

zth@SugoAsurada:~/catkin_ws/Firmware$ pip install jinja2
Collecting jinja2
  Using cached https://files.pythonhosted.org/packages/30/9e/f663a2aa66a09d838042ae1a2c5659828bb9b41ea3a6efa20a20fd92b121/Jinja2-2.11.2-py2.py3-none-any.whl
Collecting MarkupSafe>=0.23 (from jinja2)
  Downloading https://files.pythonhosted.org/packages/fb/40/f3adb7cf24a8012813c5edb20329eb22d5d8e2a0ecf73d21d6b85865da11/MarkupSafe-1.1.1-cp27-cp27mu-manylinux1_x86_64.whl
Installing collected packages: MarkupSafe, jinja2
Successfully installed MarkupSafe-1.1.1 jinja2-2.11.2

The version of jinja2 installed with this command is 2.11.2.
In ~ / catkin_ View the version of jinja2 under the directory WS / firmware,

zth@SugoAsurada:~/catkin_ws/Firmware$ python
Python 2.7.17 (default, Sep 30 2020, 13:38:04) 
[GCC 7.5.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import jinja2
>>> jinja2.__version__
'2.10'
>>> exit()

The resulting version is 2.10.
Obviously, jinja2 was not installed in the path we needed.

2. Check the location of jinja2 in the current path, and find the cause of the problem

zth@SugoAsurada:~/catkin_ws/Firmware$ python
Python 2.7.17 (default, Sep 30 2020, 13:38:04) 
[GCC 7.5.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import jinja2
>>> jinja2.__file__
'/usr/lib/python2.7/dist-packages/jinja2/__init__.pyc'
>>> exit()

After coming to the directory ‘/ usr / lib / python2.7/dist-packages/jinja2’, I found that there are no files in the directory asyncsupport.py . The PY file is missing from the official website.

3. Delete jinja2 from the specified directory and install a new jinja2

Unload command:

sudo  rm -r /usr/lib/python2.7/dist-packages/jinja2

Output results:

zth@SugoAsurada:~/catkin_ws/Firmware$ sudo  rm -r /usr/lib/python2.7/dist-packages/jinja2
zth@SugoAsurada:~/catkin_ws/Firmware$ python
Python 2.7.17 (default, Sep 30 2020, 13:38:04) 
[GCC 7.5.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import jinja2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named jinja2
>>> exit()

Installation command:

sudo pip install jinja2 --target=/usr/lib/python2.7/dist-packages

Inspection output:

zth@SugoAsurada:~/catkin_ws/Firmware$ python
Python 2.7.17 (default, Sep 30 2020, 13:38:04) 
[GCC 7.5.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import jinja2
>>> jinja2.__file__
'/usr/lib/python2.7/dist-packages/jinja2/__init__.pyc'
>>> jinja2.__version__
'2.11.2'
>>> exit()

Solution of “TCLs parsing failed” when dnf starts

Solution of “TCLs parsing failed” when dnf starts

Today, after copying the DNF file from the virtual machine and then logging in to the game with wegame, there is a problem. The pop-up box shows that the service failed to connect to the channel. Then I log in with the client and the following prompt pops up:

The solution is as follows:

X:\Dungeons and Warriors\TCLS\Client.exe
X: refers to the location of the disk where it is stored

These can solve the TCLs parsing failed error.

RuntimeError: Integer division of tensors using div or / is no longer supported, and in a future rel

RuntimeError: Integer division of tensors using div or/is no longer supported, and in a future release div will perform true division as in Python 3. Use true_divide or floor_divide (// in Python) instead.

from torchvision import transforms
import numpy as np

data = np.random.randint(0, 255, size=12)
img = data.reshape(2, 2, 3)
print(img.shape)
img_tensor = transforms.ToTensor()(img)  # Convert to tensor
print(img_tensor)
print(img_tensor.shape)
print("*" * 20)
norm_img = transforms.Normalize((10, 10, 10), (1, 1, 1))(img_tensor)  # Perform normative processing
print(norm_img)

Operation effect:

reason:

Pytorch1.5.0 is OK, but when upgrading to 1.6.0, it is found that division between tenor and int cannot be directly performed with ‘/’.

Solution:

Standardize the data processing

Example code:

from torchvision import transforms
import numpy as np

data = np.random.randint(0, 255, size=12)
img = data.reshape(2, 2, 3)
print(img.shape)
img_tensor = transforms.ToTensor()(img)  # convert to tensor
print(img_tensor)
print(img_tensor.shape)
print("*" * 20)
img_tensor = img_tensor.float()  # Add this line
norm_img = transforms.Normalize((10, 10, 10), (1, 1, 1))(img_tensor) # Perform normalization
print(norm_img)

Results of operation:

Android studio Error:Execution failed for task ‘: app:transformResourcesWithMergeJavaResForDebug ‘

Android studio error Error:Execution failed for task

Recently, when doing the face recognition check-in system based on Android platform, after importing the third party’s lib package, Android studio reported the following error:

Error:Execution failed for task ‘: app:transformResourcesWithMergeJavaResForDebug ’.
com.android.build . api.transform.TransformException : com.android.builder . packaging.DuplicateFileException : Duplicate files copied in APK META-INF/LICENSE
File1: E:\Workspaces\Swface\app\libs\httpcore-4.4.4.jar
File2: E:\Workspaces\Swface\app\libs\httpclient-4.5.2.jar

After consulting the data, it is found that there are duplicate contents loaded in the meta-inf directory of the jar package. Open the corresponding jar package
sure enough, both of the two jar packages have license, and further Click to find that the contents are exactly the same. However, it seems that the next three files are also duplicate (only there is no clear prompt in the error report), so we can solve them all at once
all Now that we know that it is caused by repeatedly loading files, the solution is to remove the repeatedly loaded files during compilation. The specific operations are as follows:

    1. Open app\ build.gradle File
    1. 2. Modify the configuration as follows:
buildTypes {
          ...... (omit part of the code)
          // Add the following code here
          packagingOptions {
            exclude 'META-INF/DEPENDENCIES'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/LICENSE.txt'
            exclude 'META-INF/NOTICE.txt'
            exclude 'META-INF/ASL2.0'
            exclude 'META-INF/notice.txt'
        }
 }       
``

3. Rebuild project

A link to the original text is attached

http://stackoverflow.com/questions/34031395/errorexecution-failed-for-task-apptransformresourceswithmergejavaresfordebug

The tree component in easyUI does not display data or displays undefined solutions

In recent days, I have learned easyUI and used the tree component. After n days of pain, I finally came out. Now I will summarize some problems.

1. In the official demo, all the data is taken from the. JSON file. In practical application, it is obviously impossible to do so. If you want to take it from the database, then the problem is, how to get it?There’s no explanation in the official demo, and I haven’t found any results after searching online for a long time

Methods 1:Ajax is fetched, after the web interface is loaded, the Ajax is called, and the value is spliced from the background in the database, and spliced into JSON. There are many methods of splicing. Here is not enumerated. After the completion of the mosaic, JSON is written back by response writer. In JS, the data parameter of tree is the returned JSON (time reason, this method is not tested, and the theory is feasible).

Method 2: root method 1 is similar: the following is the code

HTML code of tree:

<ul id="department_tree" class="easyui-tree"></ul>

JS code of tree:

/**
 * @argument Fetching data from a tree by URL
 * @author ZHENGWEI
 * @date 2015-5-8
 * @version 1.0
 */
$(document).ready(function(){
	/* Called when loading is complete*/
	$("#department_tree").tree({
		/*JSON spliced address*/
		url:'CompanyStaffAction!listCompanyDepartment.action',
		/*Linked lines*/
		lines:true,
		/*animation effect*/
		animate:true
	});
})

The URL is the action returned to JSON in the background, and the code is as follows

/**
	 * Search company's department information
	 * @author ZHENGWEI
	 * @throws JSONException 
	 * @throws IOException 
	 * @date 2015-5-7
	 */
	public String listCompanyDepartment() throws JSONException, IOException{
		//Set the encoding format to prevent Chinese characters from being garbled
		response.setCharacterEncoding("UTF-8");
		//return company department information
		List<CompanyDepartmentInfo> companyDepartmentInfoList = this.companyStaffService.listCompanyDepartment();
		// Declare the JSONArray object and build the tree
		JSONArray jsonChildTreeArray = new JSONArray();
		//condemn empty
		if(companyDepartmentInfoList.size() != 0){
			for(CompanyDepartmentInfo companyDepartmentInfo:companyDepartmentInfoList){
				JSONObject jsonChildInfoObject = new JSONObject();
				jsonChildInfoObject.put("id", '"'+companyDepartmentInfo.getDepartmentId()+'"');
				jsonChildInfoObject.put("text", companyDepartmentInfo.getDepartmentName());
				jsonChildTreeArray.put(jsonChildInfoObject);
			}
		}
		JSONObject jsonDepartmentTree = new JSONObject();
		jsonDepartmentTree.put("id", "0");
		jsonDepartmentTree.put("text", "CompanyDepartmentTree");
		jsonDepartmentTree.put("state", "open");
		// turn the jsonChildTreeArray into a child node
		jsonDepartmentTree.put("children", jsonChildTreeArray);
		//string type, add '[]' to JSON
		String treeData = jsonDepartmentTree.toString();
		treeData = "["+treeData+"]";
		// Declare PrintWriter variable to pass back JSON
		PrintWriter out = response.getWriter();
		out.write(treeData);
		return null;
	}

It must be noted that,

After the encapsulation of JSON, make sure to print it to see if there is a [] symbol package outside of JSON, otherwise tree can’t read the data!!!!

The final results are as follows:

 

 

It’s a very hard process… It’s tears when I talk too much, and many problems on the Internet can’t reach the point. I’ve thought about it for many days, and I hope that students who study in the future will avoid detours

The solution of calling$. Ajax successfully but the success method does not respond

Today, when I was working, I encountered a problem. I used $. Ajax to transfer data to the background, which can operate correctly in the background, but success did not respond, and error responded. After checking the document, I realized that after jQuery version 1.4, all the returned JSON formats must meet the requirements json.org Success can only be called back correctly in the format of, otherwise jQuery will think that it returns an error Here is an example:

JSONObject j = new JSONObject();
j.put("msg","SUCCESS");
PrintWriter out = response.getWriter();
out.write(j.toString());

This is correct. JQuery calls back success

String j = "123";
PrintWriter out = response.getWriter();
out.write(j);

This is wrong, jQuery will think it is wrong

 

Solution of Hibernate paging report only entering result set and not supporting requested operation

I checked the information on the Internet. The reason is that when pagination is used, the query result is empty, but pagination is also set, so an error will be reported.

There are two solutions:

Scheme 1, add conditions under paging code

public static List<?> getList(Session session , String HQL , int currentPage, int pageSize){
		Query q = session.createQuery(HQL);
		if(currentPage != 0 && pageSize != 0 && q.list().size()!= 0)
		{
		    int startRow = (currentPage-1)*pageSize;
		    q.setFirstResult(startRow);
		    q.setMaxResults(pageSize);
		}
	    List<?> list = q.list();
	    //Return search results
	    return list;
	 }

The if condition is that when the query result is empty, there will be no pagination, so no error will be reported.

Scheme 2: add this sentence to the hibernate configuration file

<property name="jdbc.use_scrollable_resultset">false</property>

MYSQL Error 1045 (28000): access denied for user ‘root’ @’localhost ‘(using password: Yes)

Error 1045 (28000): access denied for user ‘root’ @’localhost ‘(using password: Yes)

This prompt is a password error. If you forget your password, you can use this method to reset your password
* * 1. * * the first step to reset your password is to skip the password authentication process of MySQL
modify the MySQL configuration file
and find it in the directory of C:// program files/MySQL/MySQL server 5.7 my.cnf/my .ini/my- default.ini One of the three is modified
in [mysqld] skip-grant-tables

**2 * * restart MySQL service

	net start mysql

If this command reports an error and cannot start MySQL service, run it as an administrator cmd.exe ( cmd.exe In the directory of C: Windows: system32

**3. * * implementation again

	mysql -u root -p

You don’t need to enter a password. Press enter to enter mysql

**4 * * Change Password

	update user set Password=PASSWORD('888888') where User='root'; 
	FLUSH PRIVILEGES;

Use 888888 to login next time

5. If 4 reports error 1820 (HY000): you must set password before executing this statement, execute the code

 	SET PASSWORD = PASSWORD('123456');
	or SET PASSWORD = '123456';

Then prompt query OK, 0 rows affected (0.00 sec)
and you can log in with 123456 password