In Python, f-string is used a lot to format output strings for various development purposes, but you know what else is really cool? I’ll give you a list today. The source address

Output variable names directly to make your code simpler, syntax based on Python3.10

string = 'Hello Medusa'
print(f'{string = }')
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string = 'Hello Medusa'
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The results are evaluated directly to alter the output, with syntax based on Python3.10

number = 1024
print(f'{number % 1 =}')
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number % 1 =0
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Event objects are formatted for output directly, with syntax based on Python3.10

datetime = datetime.datetime.now()
print(f'{datetime:%Y-%m-%d %H:%M:%S}')
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The 2021-12-26 16:03:20Copy the code

Base conversion output, syntax based on Python3.10

number_10 = 1024
print(f'{number_10:b}')  # 2 into the system
print(f'{number_10:o}')  # 8 hexadecimal
print(f'{number_10:x}')  Hexadecimal lowercase
print(f'{number_10:X}')  # hex uppercase
print(f'{number_10:c}')  # ASCII encoding
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10000000000 2000 400 400Copy the code

Format floating point numbers with syntax based on Python3.10

number_float = 1024.123
print(f'{number_float = :2.f}')  Keep two decimal places
number_float_format = '.3f'
print(f'{number_float:{number_float_format}} ')  The parameter is nested, and the decimal point is reserved for three decimal places
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Number_float = 1024.12 1024.123Copy the code

For strings, the syntax is based on Python3.10

text = 'Medusa'
print(f'{text:>10}')  # right-aligned
print(f'{text:<10}')  # left-aligned
print(f'{text:^10}')  # center align
print(f'{text:*^10}')  Use * to fill in the blanks
n = 10
print(f'{text:~^{n}} ')  # parameter nested, center aligned, fill blank with ~
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    Medusa
Medusa    
  Medusa  
**Medusa**
~~Medusa~~
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! S and! R, the syntax is based on Python3.10

text = 'Medusa'
print(f'{text! s}')  # str(text)
print(f'{text! r}')  # repr(text)
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Medusa
'Medusa'
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Custom format, syntax is based on Python3.10

class MedusaFormatString:
    def __format__(self, format_spec) :
        return format_spec


print(f'{MedusaFormatString():&1&2}')
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& 1 & 2Copy the code












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