What is the difference between unicodedata.digit and unicodedata.numeric?

Question

From unicodedata doc:

unicodedata.digit(chr[, default]) Returns the digit value assigned to the character chr as integer. If no such value is defined, default is returned, or, if not given, ValueError is raised.

unicodedata.numeric(chr[, default]) Returns the numeric value assigned to the character chr as float. If no such value is defined, default is returned, or, if not given, ValueError is raised.

Can anybody explain me the difference between those two functions?

Here ones can read the implementation of both functions but is not evident for me what is the difference from a quick look because I'm not familiar with CPython implementation.

EDIT 1:

Would be nice an example that shows the difference.

EDIT 2:

Examples useful to complement the comments and the spectacular answer from @user2357112:

print(unicodedata.digit('1')) # Decimal digit one.
print(unicodedata.digit('١')) # ARABIC-INDIC digit one
print(unicodedata.digit('¼')) # Not a digit, so "ValueError: not a digit" will be generated.

print(unicodedata.numeric('Ⅱ')) # Roman number two.
print(unicodedata.numeric('¼')) # Fraction to represent one quarter.