I was trying to check for updates the GoPiGo3 library as instructed on the GoPiGo3 Documentation (Version April 26, 2018) and got the error (see image attached)
I was just trying the command for the fun of it - I think I am up to date - but now I am curious on why it did not work.
Does it behave better if you use a capital L instead of a lower case l?
curl -kL …
I did try the :L" and nope does not work either
If you run the curl command from a terminal window without piping it to bash, you can see what it is returning.
running the command as you posted it (looks like the file from your image):
running again with change suggested by cleoqc (this looks like the correct file to update the gopigo3 when piped to bash):
try again, running:
curl -kL dexterindustries.com/update_gopigo3 | sudo bash
Excellent it work! THX! 
Wait! crap! my easygopigo3 now is gone???
import easygopigo3
Traceback (most recent call last):
File “”, line 1, in
ImportError: No module named easygopigo3
I had easygopigo3 library available to me all this time – then proceeded to update with:
curl -kL dexterindustries.com/update_gopigo3 | sudo bash
And now is gone?
So I can import things like “time” but NOT easygopigo3 or gopigo3 - rendering the robot useless 
import time
import gopigo3
Traceback (most recent call last):
File “”, line 1, in
ImportError: No module named gopigo3
import easygopigo3
Traceback (most recent call last):
File “”, line 1, in
ImportError: No module named easygopigo3
Ok, so I decided the shortest route was to re-flash Rasbien OS and run DI Software update and whoala! my access to easygopigo3 and gopigo3.
For the time being I am not planning to touch the string “curl -kL dexterindustries.com/update_gopigo3 | sudo bash” Nope!
@dennys
I’m flabbergasted… I checked the dump file that you so kindly shared and it does show that the gopigo3 and easygopigo3 libraries were installed. I have no idea why you couldn’t reach them.
Are you using Python3 or 2? (the library should be available to both versions anyway).
Yeah I know - very weird, I too thought the upgrade was fine by looking at the log ?
I am using python 3 – but more importantly, I could make it happen while in VNC and trying to run some of the files at Software/Python/Examples. So with that I knew it was not a PyCharm thingy.
Anyway I just re-flashed the SD and evening went to normal
When I know I have time to spare I will try again and see what happen.
import time
import easygopigo3 as easy
gpg = easy.EasyGoPiGo3()
servo = gpg.init_servo()
print(gpg.volt())
servo.rotate_servo(80)
time.sleep(2)
servo.rotate_servo(90)
time.sleep(2)
servo.rotate_servo(120)
pi@dex:~ $ curl -kL dexterindustries.com/update_gopigo3 | sudo bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 178 100 178 0 0 1139 0 --:--:-- --:--:-- --:--:-- 1148
100 178 100 178 0 0 567 0 --:--:-- --:--:-- --:--:-- 567
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 11956 100 11956 0 0 15368 0 --:--:-- --:--:-- --:--:-- 15368
GoPiGo3 installer script must be run with "pi" user. Exiting.
pi@dex:~ $
pi@dex:~ $ curl -kL dexterindustries.com/update_gopigo3 | bash
curl -kL dexterindustries.com/update_gopigo3 | sudo bash
pi@dex:~ $ curl -kL dexterindustries.com/update_gopigo3 | sudo bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 178 100 178 0 0 1139 0 --:--:-- --:--:-- --:--:-- 1148
100 178 100 178 0 0 567 0 --:--:-- --:--:-- --:--:-- 567
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 11956 100 11956 0 0 15368 0 --:--:-- --:--:-- --:--:-- 15368
GoPiGo3 installer script must be run with "pi" user. Exiting.
pi@dex:~ $
pi@dex:~ $ curl -kL dexterindustries.com/update_gopigo3 | bash
pi@dex:~/kr $ test_gpg.py
Traceback (most recent call last):
File "servo_120.py", line 1, in <module>
import easygopigo3 as easy
File "build/bdist.linux-armv7l/egg/easygopigo3.py", line 11, in <module>
ImportError: cannot import name Mutex
pi@dex:~/kr $
pi@dex:~/kr $ sudo pip uninstall gopigo -y
Uninstalling GoPiGo:
Successfully uninstalled GoPiGo
pi@dex:~/kr $ sudo pip3 uninstall gopigo -y
Uninstalling GoPiGo:
Successfully uninstalled GoPiGo
pi@dex:~/kr $
curl -kL dexterindustries.com/update_gopigo3 | bash
pi@dex:~/kr $ test_gpg.py
Traceback (most recent call last):
File "servo_120.py", line 1, in <module>
import easygopigo3 as easy
File "build/bdist.linux-armv7l/egg/easygopigo3.py", line 11, in <module>
ImportError: cannot import name Mutex
pi@dex:~/kr $
Glad I was not entirely crazy 
On Friday we made a few more changes that are quite important. Tomorrow or in 2 days tops we’ll have the official image up on our stream - and by then there won’t be any other problems.
What it’s still unexplained is why installing the gopigo3 package doesn’t install I2C_mutex too, because we’ve tried it too we couldn’t replicate it. In light of all these, could you rip the image and send it to us? You can send it at my email address and I’ll take care of it: robert@dexterindustries.com.
Anyway, for the time being, we can fix this just by installing the package directly. For this, please run the following commands:
git clone https://github.com/DexterInd/RFR_Tools
cd RFR_Tools/miscellaneous
sudo python setup.py install
sudo python3 setup.py install
That should get everything installed for you.
Please let me know if this solves your problem.
Thank you!
Thanks for looking into this, I was just trying to replicate the problems @dennys was having.
I’ll be using the stretch image from now on and it seems to be working now without errors.
Great THX @RobertLucian – I will wait for the new image and try!
And thanks to @kev.r for replicating what I saw previously!
We’ve published the image, but at this moment it’s still a beta - for all intents and purposes it’s considerate to be the final one, but we still need to do a few sanity checks. Here’s the link to the image:
Let us know if things go smoothly for you.
Thank you!
PS: With this update we’re supporting Stretch - Jessie works too, but our main focus will be Stretch.