formatting in python

# There are 3 different types of formatting. 
>>> name = "John"
>>> age = 19
>>> language = "python"
>>> print(f"{name} of age {age} programs in {language}") # Commonly used.
John of age 19 programs in python
>>> print("%s of age %d programs in %s" %(name, age, language)) # %s for str(), %d for int(), %f for float().
John of age 19 programs in python
>>> print("{} of age {} programs in {}".format(name, age, language)) # Values inside .format() will be placed inside curly braces repectively when no index is specified.
John of age 19 programs in python
>>> print("{2} of age {1} programs in {0}".format(name, age, language)) # Index can be specified inside of curly braces to switch the values from .format(val1, val2, val3).
python of age 19 programs in John

python format string

>>> nombre = 357568.12312
>>> nombre2 = 568.568768
>>> nombre3 = -34.3432
>>> nombre4 = 23
>>> print(f'{nombre : >+20_.4f} {nombre2 : >+20_.4f}')
>>> print(f'{nombre3 : >+20_.4f} {nombre4 : >+20_.4f}')

+357_568.1231            +568.5688
     -34.3432             +23.0000

string format method python

# ------------------- string format, f-string ----------------------------

# {} is placeholder
num1 = 5
num2 = 3                
print(f'{num1} times {num2} is {num1 / num2:.2f}')  #2f means print to 2 decimal precision
#5 times 3 is 1.67

#explicit call format() method
number1 = 'One'
number2 = 'Two'
number3 = 'Three'

# default(implicit) order
default_order = "{}, {} and {}".format(number1,number2,number3)
print(default_order)
# One, Two and Three

# order using positional argument
positional_order = "{1}, {0} and {2}".format(number1,number2,number3)
print(positional_order)
# Two, One and Three

# order using keyword argument
keyword_order = "{i}, {j} and {k}".format(j=number1,k=number2,i=number3)
print(keyword_order)
# Three, One and Two

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