“Python F Strings Formateo de números” Código de respuesta

formato de número de fString python

num = 10.4999
print(f"The formatted number is {num:.2f}")
# output: The formatted number is 10.49
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Python F Strings Formateo de números

from random import randint
for i in range(5):
    print(f'My money is {randint(0, 150):>3}$')
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Python F Strings Formateo de números

Syntax: "{" [field_name] ["!" conversion] [":" format_spec] "}"

# let's understand what each field means...
    field_name        ::=  arg_name ("." attribute_name | "[" element_index "]")*
    arg_name          ::=  [identifier | digit+]
    attribute_name    ::=  identifier
    element_index     ::=  digit+ | index_string
    index_string      ::=  <any source character except "]"> +
    conversion        ::=  "r" | "s" | "a"
    format_spec       ::=  [[fill]align][sign][#][0][width][grouping_option][.precision][type]

            # Looking at the underlying fields under format_spec...
            fill            ::=  <any character>
            align           ::=  "<" | ">" | "=" | "^"
            sign            ::=  "+" | "-" | " "
            width           ::=  digit+
            grouping_option ::=  "_" | ","
            precision       ::=  digit+
            type            ::=  "b" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" | "n" | "o" | "s" | "x" | "X" | "%"
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Python F Strings Formateo de números

grade = 29/45

print(f'My grade rounded to 3 decimals is {grade:.3%}.')
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Python F Strings Formateo de números

# Let's break it down...
#       [field_name]     => number1
#       ["!" conversion] => Not used
#       [format_spec]    => [.precision][type] 
#                        => .[2][f] => .2f  # where f means Fixed-point notation
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Python F Strings Formateo de números

f'{value:{width}.{precision}}'
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