2. Library Errors

2.1. Missing asterisk

Normally the full microbit library is imported via from microbit import *.

In the code below, the final * has been left out.

# missing asterisk
from microbit import

If the asterisk is left out, a small red triangle will be shown at the end of the line.

2.2. Missing space before asterisk

In the code below, a space has been left out from before the final *.

Even though the code will work, this is bad coding.

# missing space before the asterisk
from microbit import*

The Python interpreter is designed to be flexible in interpreting the syntax. In the case of import*, even though it’s not the standard way to write it, the Python interpreter can still understand it.

When the Python interpreter sees import*, it recognizes import as a keyword and * as a wildcard character. The lack of space doesn’t prevent the interpreter from understanding the command. It knows that import is a command to import a module, and * means everything from that module.

2.3. Misspelt library

If the microbit library is misspelt, then an module not found error occurs, as shown below.

# microbot instead of microbit
from microbot import *

2.4. Imported library not used

If the microbit library is imported via import microbit, all microbit code needs to start with microbit..
In the code below, the line should be: microbit.display.scroll('hello').
If microbit. is left out, a red wavy line will be shown where the errors are.
display will not be recognized, (undefined name), since python has not been told that it is in microbit library.
The microbit library will also appear not to be used.

import microbit

# should use microbit.display.scroll('hello')
display.scroll('hello')