Decimal (Global precision setting)

[Valentina]

Hello!
I am doing my first steps in programming. I am using Python 3.7.2
I opened interesting numbers for me - Decimal fixed point.
But I have problems with precision setting.
I am trying to use decimal.getcontext( ).prec function.
This example from book works great:

Result:

But than I am trying to do my own example - the precision is not working.


I want to receive 4 digits after point, but instead I received "long number". I thougt may be these number after "0", but format is correct (not “%e” % num).

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Local precision setting also not working.

Example from book:



My example:



Thank you very much for support!
Best regards, Valentina.

[perfringo]

From documentation:

The significance of a new Decimal is determined solely by the number of digits input. Context precision and rounding only come into play during arithmetic operations.

[snippsat]

Use code tag @Valentina and not images.

[Valentina]

From documentation:

The significance of a new Decimal is determined solely by the number of digits input. Context precision and rounding only come into play during arithmetic operations.

Thank you very much. I understood. Now it is working.