what is the specific meaning of "path" in the "pip install -e path/to/cflib"

[NickCong]

Hi

i follow the instruction in the crazyflie-lib-python,but i don't understand the word "path" in the "pip install -e path/to/cflib",so i try to input the crazyflie-lib-python as the path ,and it say like this
it seems say i has success install the cflib
but when i I'm going to do that python examples/basiclog,it says
i guess the problem is the path which i input is wrong before.
,what should i do ? thank you

[Jens_Lee]

Hi NickCong

If you 'cd' into the examples folder, so your path looks something like this:

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jenslee@jenslee-ThinkPad-T400:~/crazyflie/crazyflie-lib-python/examples$

and the run the example:

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python basiclog.py

What happens then?

[NickCong]

Hi NickCong

If you 'cd' into the examples folder, so your path looks something like this:

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jenslee@jenslee-ThinkPad-T400:~/crazyflie/crazyflie-lib-python/examples$

and the run the example:

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python basiclog.py

What happens then?

Hi,Jens_Lee
i follow your say to do,but it occurs the same problem

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nickcong@nickcong-Inspiron-3537:~$ cd crazyflie-lib-python/examples/
nickcong@nickcong-Inspiron-3537:~/crazyflie-lib-python/examples$ python basiclog.py 
Traceback (most recent call last):
  File "basiclog.py", line 34, in <module>
    import cflib.crtp  # noqa
ImportError: No module named cflib.crtp

[Jens_Lee]

Try and see if cflib is actually installed

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pip search cflib

or actually:

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pip freeze

[NickCong]

Try and see if cflib is actually installed

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pip search cflib

or actually:

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pip freeze

Hi,Jens_Lee
I seem success,i may be konw what you mean,
first i

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nickcong@nickcong-Inspiron-3537:~/crazyflie-lib-python$ source venv/bin/activate

and then in the venv mode i input

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(venv) nickcong@nickcong-Inspiron-3537:~$ pip install -e crazyflie-lib-python/

it says

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(venv) nickcong@nickcong-Inspiron-3537:~$ pip install -e crazyflie-lib-python/
Obtaining file:///home/nickcong/crazyflie-lib-python
Requirement already satisfied: pyusb>=1.0.0b2 in ./crazyflie-lib-python/venv/lib/python3.5/site-packages (from cflib==0.1.3)
Installing collected packages: cflib
  Running setup.py develop for cflib
Successfully installed cflib

and then i just try it

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(venv) nickcong@nickcong-Inspiron-3537:~/crazyflie-lib-python$ python examples/basiclog.py 
Scanning interfaces for Crazyflies...
Crazyflies found:
No Crazyflies found, cannot run example
Traceback (most recent call last):
  File "examples/basiclog.py", line 143, in <module>
    while le.is_connected:
NameError: name 'le' is not defined

the problem before seems not exist,but a new matter is occur，it says Crazyflies no found,but i have connected the crazyfile2.0 via radio in the cfclient and it can work .

[Jens_Lee]

it says Crazyflies no found,but i have connected the crazyfile2.0 via radio in the cfclient and it can work .

It won't work if you are connected through the cfclient at the same time. Try disconnecting there, and then run the script again.

[NickCong]

it says Crazyflies no found,but i have connected the crazyfile2.0 via radio in the cfclient and it can work .

It won't work if you are connected through the cfclient at the same time. Try disconnecting there, and then run the script again.

Hi
it is also the same,the crazyflie can't be found and say name 'le' is not defined

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Scanning interfaces for Crazyflies...
Crazyflies found:
No Crazyflies found, cannot run example
Traceback (most recent call last):
  File "examples/basiclog.py", line 143, in <module>
    while le.is_connected:
NameError: name 'le' is not defined

how can i connect the crazyflie in the terminal?

[tobias]

how can i connect the crazyflie in the terminal?

That should work. Is the CF2 turned on? And you had no problem when connecting using the cfclient?

This is my output:

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Scanning interfaces for Crazyflies...
Crazyflies found:
radio://0/110/2M
Connecting to radio://0/110/2M
Connected to radio://0/110/2M
[25453][Stabilizer]: {'stabilizer.roll': -5.625945091247559, 'stabilizer.yaw': 2.656627893447876, 'stabilizer.pitch': 1.7939248085021973}
[25463][Stabilizer]: {'stabilizer.roll': -5.567243576049805, 'stabilizer.yaw': 2.634549617767334, 'stabilizer.pitch': 1.777416467666626}
[25473][Stabilizer]: {'stabilizer.roll': -5.510120391845703, 'stabilizer.yaw': 2.723010540008545, 'stabilizer.pitch': 1.854751467704773}
...

[NickCong]

how can i connect the crazyflie in the terminal?

That should work. Is the CF2 turned on? And you had no problem when connecting using the cfclient?

This is my output:

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Scanning interfaces for Crazyflies...
Crazyflies found:
radio://0/110/2M
Connecting to radio://0/110/2M
Connected to radio://0/110/2M
[25453][Stabilizer]: {'stabilizer.roll': -5.625945091247559, 'stabilizer.yaw': 2.656627893447876, 'stabilizer.pitch': 1.7939248085021973}
[25463][Stabilizer]: {'stabilizer.roll': -5.567243576049805, 'stabilizer.yaw': 2.634549617767334, 'stabilizer.pitch': 1.777416467666626}
[25473][Stabilizer]: {'stabilizer.roll': -5.510120391845703, 'stabilizer.yaw': 2.723010540008545, 'stabilizer.pitch': 1.854751467704773}
...

Hi,tobis
i am very glad to you see the problem,and very thank you for your answer.
i try again and again,finally i find the problem,but i don't know why.now,it can work in the terminal.
i have no problem when connecting using the cfclient,but it needed sudo or it can't connect, so i guess it may be the same reason that can't connect the CF2 in the terminal ,so when i add sudo,it output like this

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(venv) nickcong@nickcong-Inspiron-3537:~/crazyflie-lib-python$ sudo python examples/basiclog.py 
Traceback (most recent call last):
  File "examples/basiclog.py", line 34, in <module>
    import cflib.crtp  # noqa
ImportError: No module named cflib.crtp

if i don't add sudo ,it output like this

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(venv) nickcong@nickcong-Inspiron-3537:~/crazyflie-lib-python$ python examples/basiclog.py 
Scanning interfaces for Crazyflies...
Crazyflies found:
No Crazyflies found, cannot run example
Traceback (most recent call last):
  File "examples/basiclog.py", line 143, in <module>
    while le.is_connected:
NameError: name 'le' is not defined

in the end,i just try do it in the root mode,thanks god,it success at last
it out put like this

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(venv) root@nickcong-Inspiron-3537:/home/nickcong/crazyflie-lib-python# python examples/basiclog.py
Scanning interfaces for Crazyflies...
Crazyflies found:
usb://0
Connecting to usb://0
Connected to usb://0
[438809][Stabilizer]: {'stabilizer.yaw': -0.31768038868904114, 'stabilizer.pitch': -1.4990111589431763, 'stabilizer.roll': 1.2577241659164429}
[438819][Stabilizer]: {'stabilizer.yaw': -0.3178338408470154, 'stabilizer.pitch'

1.so,later if i want to do like this does it means i always need the root mode?
2.i have bought your loco position system ,because i want get my CF2 automatic flight.i have the question that do i modify directly the sequence coordinate in the "autonomousSequence.py" and then do "python examples/autonomousSequence.py" is ok?
and will the CF2 fly automatically according to my setup in this

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# Change the sequence according to your setup
#             x    y    z  YAW
sequence = [
    (2.5, 2.5, 1.2, 0),
    (1.5, 2.5, 1.2, 0),
    (2.5, 2.0, 1.2, 0),
    (3.5, 2.5, 1.2, 0),
    (2.5, 3.0, 1.2, 0),
    (2.5, 2.5, 1.2, 0),
    (2.5, 2.5, 0.4, 0),
]

do i think have problem?or need i do other things? (i am a new,it is my first to use the linux and my first time to touch the CF2)

3.in the linux,how can i install the toobelt?i browse the instruction in the README.md,it only say install toolbelt in the windows,but it doesn't guide install the toolbelt in the linux.

[tobias]

Great that you got it to work. I will answer your nr 1 question but the 2,3 should be a new topic in the autonomous flight category. Can you please start the discussion there?

1.so,later if i want to do like this does it means i always need the root mode?

By adding udev rules to linux you don't have to be root as e.g. described here.