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I have very small or very big number which I want print in scientific notation:

pattern = "{:.0e}"
value1 = pattern.format(0.00003)
value2 = pattern.format(0.00000000005)
value3 = pattern.format(999999999) 
print(value1, value2, value3)
# Current output: 3e-05 5e-11 1e+09
# Desired output: 3e-5 5e-11 1e+9

Is there any better way to format number into form without 0 after - than value1.replace("-0", "-").replace("+0", "+")? I would like the number to be as short as possible.

Michal
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  • Does this answer your question? [remove leading 0 in exponential format in python](https://stackoverflow.com/questions/14863143/remove-leading-0-in-exponential-format-in-python) – Carlos Gonzalez Apr 30 '20 at 10:12

1 Answers1

0

Use decimal.

import decimal
pattern = "{:.0e}"
value1 = pattern.format(decimal.Decimal('0.00003'))
value2 = pattern.format(decimal.Decimal('0.00000000005'))
value3 = pattern.format(decimal.Decimal('999999999'))
print(value1, value2, value3)
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