8.2.3 Numeric Formatting

Formatting Positive Numbers with Signs

  • A + before the field width specifies that a positive number should be preceded by a +
  • To fill the remaining characters of the field with 0s rather than spaces, place a 0 before the field width (and after the + if there is one)
In [1]:
f'[{27:+10d}]'
Out[1]:
'[       +27]'
In [2]:
f'[{27:+010d}]'
Out[2]:
'[+000000027]'

Using a Space Where a + Sign Would Appear in a Positive Value

  • A space indicates that positive numbers should show a space character in the sign position
In [3]:
print(f'{27:d}\n{27: d}\n{-27: d}')

27
 27
-27

Grouping Digits

  • Format numbers with thousands separators by using a comma (,)
In [4]:
f'{12345678:,d}'
Out[4]:
'12,345,678'
In [5]:
f'{123456.78:,.2f}'
Out[5]:
'123,456.78'

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