*Memos:
- My post explains Format Specification with format() (1).
- My post explains Format Specification with format() (2).
- My post explains Format Specification with format() (3).
- My post explains Format Specification with format() (5).
- My post explains format().
- My post explains a string.
:[f][a][s][z][#][0][w][g][.p][t] can format a string as shown below. *Format Specification Mini-Language explains more details:
<Format a string with Decimal() by 'f' or 'F'>:
from decimal import Decimal
v = Decimal(value='1234.5555555555')
# | 10 |
print(v)
# 1234.5555555555
# | 10 |
print('"{:.20f}"'.format(v))
print('"{:.20F}"'.format(v))
# "1234.55555555550000000000"
# | 20 |
print('"{:.15f}"'.format(v))
print('"{:.15F}"'.format(v))
# "1234.555555555500000"
# | 15 |
print('"{:.10f}"'.format(v))
print('"{:.10F}"'.format(v))
print('"{:f}"'.format(v))
print('"{:F}"'.format(v))
# "1234.5555555555"
# | 10 |
print('"{:.6f}"'.format(v))
print('"{:.6F}"'.format(v))
# "1234.555556"
# | 6 |
print('"{:.2f}"'.format(v))
print('"{:.2F}"'.format(v))
# "1234.56"
print('"{:.1f}"'.format(v))
print('"{:.1F}"'.format(v))
# "1234.6"
print('"{:.0f}"'.format(v))
print('"{:.0F}"'.format(v))
# "1235"
print('"{:#.0f}"'.format(v))
print('"{:#.0F}"'.format(v))
# "1235."
print('"{:,.20f}"'.format(v))
print('"{:,.20F}"'.format(v))
# "1,234.55555555550000000000"
# | 20 |
print('"{:,f}"'.format(v))
print('"{:,F}"'.format(v))
# "1,234.5555555555"
# | 10 |
print('"{:_.20f}"'.format(v))
print('"{:_.20F}"'.format(v))
print('"{:_f}"'.format(v))
print('"{:_F}"'.format(v))
# ValueError: invalid format string
from decimal import Decimal
print('"{:f} {:f}"'.format(Decimal(value='nan'), Decimal(value='inf')))
print('"{:F} {:F}"'.format(Decimal(value='nan'), Decimal(value='inf')))
# "NaN Infinity"
*Decimal() without str gets an improper value.
from decimal import Decimal
v = Decimal(value=1234.5555555555)
# | 10 |
print(v)
# 1234.555555555499950060038827359676361083984375
# | 42 |
print('"{:.20f}"'.format(v))
print('"{:.20F}"'.format(v))
# "1234.55555555549995006004"
# | 20 |
print('"{:.15f}"'.format(v))
print('"{:.15F}"'.format(v))
# "1234.555555555499950"
# | 15 |
print('"{:.10f}"'.format(v))
print('"{:.10F}"'.format(v))
# "1234.5555555555"
# | 10 |
print('"{:.6f}"'.format(v))
print('"{:.6F}"'.format(v))
# "1234.555556"
# | 6 |
print('"{:.2f}"'.format(v))
print('"{:.2F}"'.format(v))
# "1234.56"
print('"{:.1f}"'.format(v))
print('"{:.1F}"'.format(v))
# "1234.6"
print('"{:.0f}"'.format(v))
print('"{:.0F}"'.format(v))
# "1235"
print('"{:#.0f}"'.format(v))
print('"{:#.0F}"'.format(v))
# "1235."
print('"{:f}"'.format(v))
print('"{:F}"'.format(v))
# "1234.555555555499950060038827359676361083984375"
# | 42 |
print('"{:,.20f}"'.format(v))
print('"{:,.20F}"'.format(v))
# "1,234.55555555549995006004"
# | 20 |
print('"{:,f}"'.format(v))
print('"{:,F}"'.format(v))
# "1,234.555555555499950060038827359676361083984375"
# | 42 |
print('"{:_.20f}"'.format(v))
print('"{:_.20F}"'.format(v))
print('"{:_f}"'.format(v))
print('"{:_F}"'.format(v))
# ValueError: invalid format string
from decimal import Decimal
print('"{:f} {:f}"'.format(Decimal(value=float('nan')),
Decimal(value=float('inf'))))
print('"{:F} {:F}"'.format(Decimal(value=float('nan')),
Decimal(value=float('inf'))))
# "NaN Infinity"
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