"isdigit()" with 0.00 does not work

Question

Why the method isdigit() does not identify that 0.00 is a digit? I am working with a few million data and certain records have values like 0.0000001 or 0.00.

• When I try to convert the 0.0000001 for Decimal, he returns me 1E-7
• When valid if "0.00".isdigit() he returns me False.

Answer 1

Because it is not composed only of digits. The dot is not a digit. Ask the right question you will get the right answer.

try:
    resultado = Decimal(numero)
except ValueError:
    print('Não foi possível converter')

As for the question of scientific notation, it only matters when the number has to be translated into text - whether for screen printing, text file storage, inclusion in an HTML template, etc... At this point, the number must go through the method format - either through it explicitly, either with the new "F-strings" of Python, or by calling the function format of Python directly (the three methods will call the method __format__ internal object Decimal). And for the format, just pass the formatting as "float" (letter f) for printing the Decimal unclassified:

print("{:f}".format(Decimal(".00000001"))

or:

print(format(Decimal(".00000000001"), "f"))

I put in the Github for future reference.