Python 3 Coding Issue_Print Command

[neteng]

Hi,

my print command doesn't seem to work....I am using the nanpy-firmware to establish master-slave protocol with my arduino....when I apply hashtags to all the print commands, the program executes......when i don't it pops up a syntax error

the error is:

File"buttonLED.py", line 13
print("Failed to connect ot arduino")
^
SyntaxError: invalid character in identifier.

this was in a youtube tutorial....https://www.youtube.com/watch?v=QumIhvYtRKQ

the code is below:

Code: Select all

from nanpy import (ArduinoApi, SerialManager)
from time import sleep

ledPin = 7
buttonPin = 8
ledState = False
buttonState = 0

try:
    connection = SerialManager()
    a = ArduinoApi(connection = connection)
except:
    print(¨Failed to connect to arduino¨)

#setup the pinmodes as if we were in ARDUINO IDE
a.pinMode(ledPin, a.OUTPUT)
a.pinMode(buttonPin,a.INPUT)

try:
    while True:
        buttonState = a.digitalRead(buttonPin)
        print(¨Our button state is: {}¨.format(buttonState))
        if buttonState:
            if ledState:
                a.digitalWrite(ledPin, a.LOW)
                ledState = False
                print(¨LED OFF¨)
                sleep(1)
            else:
                a.digitalWrite(ledPin, a.HIGH)
                ledState = True
                print(¨LED ON¨)
                sleep(1)
except:
    a.digitalWrite(ledPin, a.LOW)

[rpdom]

It looks like you've got some weir quotation marks on that line

Code: Select all

    print(¨Failed to connect to arduino¨)

it should look like this

Code: Select all

    print("Failed to connect to arduino")

It is probably a result of a copy/paste from a web page with some bad formatting.

[neteng]

It looks like you've got some weir quotation marks on that line

Code: Select all

    print(¨Failed to connect to arduino¨)

it should look like this

Code: Select all

    print("Failed to connect to arduino")

It is probably a result of a copy/paste from a web page with some bad formatting.

Hi rpdom....

No, i typed it in myself. When I hit the double quotation on the keyboard, thats the symbol that pops up. it does look weird. Even the print function which has its font of purple colour is not orange like the import function.....

Note that it happens after i do "sudo apt-get upgrade"...after I install the raspbian os and before the upgrade, it works fine...

What could be the problem??....is it my keyboard settings??...What should be the keyboard setting???

[scotty101]

Try single quotes instead

Code: Select all

print('Hello World')

[B.Goode]

I don't know how you are getting this odd character or how to solve it, but just to point out that the issue has arisen in these forums before:

viewtopic.php?f=63&t=156285

[Paeryn]

It looks like you're getting a diaeresis rather than a quotation mark. I'd check your keyboard settings, if it's set to a language that uses diacritics then it may be thinking you are wanting to put it onto a letter (if you follow it with a vowel then the diaeresis will likely be put on the vowel).