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String in Python (28)

Buy Me a Coffee☕ *Memos: My post explains Format Specification with format() (1). My post explains Format Specification with format() (2). My post explains F…

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*Memos:





:[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 float input by or not by 'g' or 'G'>:






v = 123456.78912

  # |    11    |



print(v)

# 123456.78912

# |    11    |



print(f'"{v:.20g}"')

print(f'"{v:.20G}"')

print(f'"{v:.20}"')

# "123456.78912000000128"

#  |        20         |



print(f'"{v:.18g}"')

print(f'"{v:.18G}"')

print(f'"{v:.18}"')

# "123456.789120000001"

#  |       18        |



print(f'"{v:.17g}"')

print(f'"{v:.17G}"')

print(f'"{v:.17}"')

print(f'"{v:.11g}"')

print(f'"{v:.11G}"')

print(f'"{v:.11}"')

print(f'"{v:}"')

print(f'"{v}"')

# "123456.78912"

#  |    11    |



print(f'"{v:.10g}"')

print(f'"{v:.10G}"')

print(f'"{v:.10}"')

# "123456.7891"

#  |   10    |



print(f'"{v:.9g}"')

print(f'"{v:.9G}"')

print(f'"{v:.9}"')

# "123456.789"

#  |   9    |



print(f'"{v:.8g}"')

print(f'"{v:.8G}"')

print(f'"{v:.8}"')

# "123456.79"

#  |   8   |



print(f'"{v:.7g}"')

print(f'"{v:.7G}"')

print(f'"{v:.7}"')

# "123456.8"

#  |  7   |



print(f'"{v:.6g}"')

print(f'"{v:.6G}"')

print(f'"{v:g}"')

print(f'"{v:G}"')

# "123457"

#  | 6  |



print(f'"{v:.6}"')

# "1.23457e+05"

#  |  6  |



print(f'"{v:.5g}"')

print(f'"{v:.5}"')

# "1.2346e+05"

#  | 5  |



print(f'"{v:.5G}"')

# "1.2346E+05"

#  | 5  |



print(f'"{v:.4g}"')

print(f'"{v:.4}"')

# "1.235e+05"

#  | 4 |



print(f'"{v:.4G}"')

# "1.235E+05"

#  | 4 |



print(f'"{v:.3g}"')

print(f'"{v:.3}"')

# "1.23e+05"

#  |3 |



print(f'"{v:.3G}"')

# "1.23E+05"

#  |3 |



print(f'"{v:.2g}"')

print(f'"{v:.2}"')

# "1.2e+05"

#  |2|



print(f'"{v:.2G}"')

# "1.2E+05"

#  |2|



print(f'"{v:.1g}"')

print(f'"{v:.1}"')

print(f'"{v:.0g}"')

print(f'"{v:.0}"')

# "1e+05"



print(f'"{v:.1G}"')

print(f'"{v:.0G}"')

# "1E+05"



print(f'"{v:#.1g}"')

print(f'"{v:#.1}"')

print(f'"{v:#.0g}"')

print(f'"{v:#.0}"')

# "1.e+05"



print(f'"{v:#.1G}"')

print(f'"{v:#.0G}"')

# "1.E+05"



print(f'"{v:,.20g}"')

print(f'"{v:,.20G}"')

print(f'"{v:,.20}"')

# "123,456.78912000000128"

#  |         20         |



print(f'"{v:,g}"')

print(f'"{v:,G}"')

# "123,457"

#  |  6  |



print(f'"{v:,}"')

# "123,456.78912"

#  |    11     |



print(f'"{v:_.20g}"')

print(f'"{v:_.20G}"')

# "123_456.78912000000128"

#  |         20         |



print(f'"{v:_g}"')

print(f'"{v:_G}"')

# "123_457"

#  |  6  |



print(f'"{v:_}"')

# "123_456.78912"

#  |    11     |











print(f'{float('nan'):g} {float('inf'):g}')

# nan inf



print(f'{float('nan'):G} {float('inf'):G}')

# NAN INF









<Format a string with Decimal() input by or not by 'g' or 'G'>:






v = Decimal('123456.78912')

           # |    11    |



print(v)

# 123456.78912

# |    11    |



print(f'"{v:.20g}"')

print(f'"{v:.20G}"')

print(f'"{v:.20}"')

print(f'"{v:.18g}"')

print(f'"{v:.18G}"')

print(f'"{v:.18}"')

print(f'"{v:.17g}"')

print(f'"{v:.17G}"')

print(f'"{v:.17}"')

print(f'"{v:.11g}"')

print(f'"{v:.11G}"')

print(f'"{v:.11}"')

print(f'"{v:g}"')

print(f'"{v:G}"')

print(f'"{v:}"')

print(f'"{v}"')

# "123456.78912"

#  |    11    |



print(f'"{v:.10g}"')

print(f'"{v:.10G}"')

print(f'"{v:.10}"')

# "123456.7891"

#  |   10    |



print(f'"{v:.9g}"')

print(f'"{v:.9G}"')

print(f'"{v:.9}"')

# "123456.789"

#  |   9    |



print(f'"{v:.8g}"')

print(f'"{v:.8G}"')

print(f'"{v:.8}"')

# "123456.79"

#  |   8   |



print(f'"{v:.7g}"')

print(f'"{v:.7G}"')

print(f'"{v:.7}"')

# "123456.8"

#  |  7   |



print(f'"{v:.6g}"')

print(f'"{v:.6G}"')

print(f'"{v:.6}"')

# "123457"

#  | 6  |



print(f'"{v:.5g}"')

# "1.2346e+5"

#  | 5  |



print(f'"{v:.5G}"')

print(f'"{v:.5}"')

# "1.2346E+5"

#  | 5  |



print(f'"{v:.4g}"')

# "1.235e+5"

#  | 4 |



print(f'"{v:.4G}"')

print(f'"{v:.4}"')

# "1.235E+5"

#  | 4 |



print(f'"{v:.3g}"')

# "1.23e+5"

#  |3 |



print(f'"{v:.3G}"')

print(f'"{v:.3}"')

# "1.23E+5"

#  |3 |



print(f'"{v:.2g}"')

# "1.2e+5"

#  |2|



print(f'"{v:.2G}"')

print(f'"{v:.2}"')

# "1.2E+5"

#  |2|



print(f'"{v:.1g}"')

print(f'"{v:.0g}"')

# "1e+5"



print(f'"{v:.1G}"')

print(f'"{v:.1}"')

print(f'"{v:.0G}"')

print(f'"{v:.0}"')

# "1E+5"



print(f'"{v:#.1g}"')

print(f'"{v:#.0g}"')

# "1.e+5"



print(f'"{v:#.1G}"')

print(f'"{v:#.1}"')

print(f'"{v:#.0G}"')

print(f'"{v:#.0}"')

# "1.E+5"



print(f'"{v:,.20g}"')

print(f'"{v:,.20G}"')

print(f'"{v:,.20}"')

print(f'"{v:,g}"')

print(f'"{v:,G}"')

print(f'"{v:,}"')

# "123,456.78912"

#  |    11     |



print(f'"{v:_.20g}"')

print(f'"{v:_.20G}"')

print(f'"{v:_.20}"')

print(f'"{v:_g}"')

print(f'"{v:_G}"')

print(f'"{v:_}"')

# ValueError: invalid format string











from decimal import Decimal



v1 = Decimal(value=float('nan'))

v2 = Decimal(value=float('inf'))



print(f'"{v1:g} {v2:g}"')

print(f'"{v1:G} {v2:G}"')

# "NaN Infinity"


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