PYTHON

python formatting strings

Number		Format		Output   					Description
3.1415926	{:.2f}		3.14			Format float 2 decimal places
3.1415926	{:+.2f}		+3.14			Format float 2 decimal places with sign
-1	{:+.2f}				-1.00					Format float 2 decimal places with sign
2.71828	{:.0f}			3					Format float with no decimal places
5	{:0>2d}				05						Pad number with zeros (left padding, width 2)
5	{:x<4d}				5xxx					Pad number with x’s (right padding, width 4)
10	{:x<4d}				10xx					Pad number with x’s (right padding, width 4)
1000000	{:,}			1,000,000	      Number format with comma separator
0.25	{:.2%}		    25.00%	         Format percentage
1000000000	{:.2e}		1.00e+09		Exponent notation
13	{:10d}	      	    13				Right aligned (default, width 10)
13	{:<10d}				13						Left aligned (width 10)
13	{:^10d}	    		13					Center aligned (width 10)

formatted string python

# Newer f-string format
name = "Foo"
age = 12
print(f"Hello, My name is {name} and I'm {age} years old.")
# output :
# Hello, my name is Foo and I'm 12 years old.

python string format

string_a = "Hello"
string_b = "Cena"

# Index based:
print("{0}, John {1}"
      .format(string_a, string_b))
# Object based:
print("{greeting}, John {last_name}"
      .format(greeting=string_a, last_name=string_b))

How to use .format in python

#The {} are replaced by the vairables after .format
new_string = "{} is string 1 and {} is string 2".format("fish", "pigs")

python string format

print("My name is {0} and I am {1} years old".format(name, age))

python format strings

name = "Rick"
age = 42
print(f"My name is {name} and I am {age} years old")

Python string formatting

# String Formatting
name1 = 'Andrei'
name2 = 'Sunny'
print(f'Hello there {name1} and {name2}')       # Hello there Andrei and Sunny - Newer way to do things as of python 3.6
print('Hello there {} and {}'.format(name1, name2))# Hello there Andrei and Sunny
print('Hello there %s and %s' %(name1, name2))  # Hello there Andrei and Sunny --> you can also use %d, %f, %r for integers, floats, string representations of objects respectively

Python format() Method for Formatting Strings

# Python string format() method

# default(implicit) order
default_order = "{}, {} and {}".format('John','Bill','Sean')
print('
--- Default Order ---')
print(default_order)

# order using positional argument
positional_order = "{1}, {0} and {2}".format('John','Bill','Sean')
print('
--- Positional Order ---')
print(positional_order)

# order using keyword argument
keyword_order = "{s}, {b} and {j}".format(j='John',b='Bill',s='Sean')
print('
--- Keyword Order ---')
print(keyword_order)

formatted string in python

>>> name = "world"
>>> print(f"Hello {name}!)"
'Hello world!'

python format string

>>> 'Coordinates: {latitude}, {longitude}'.format(latitude='37.24N', longitude='-115.81W')
'Coordinates: 37.24N, -115.81W'
>>> coord = {'latitude': '37.24N', 'longitude': '-115.81W'}
>>> 'Coordinates: {latitude}, {longitude}'.format(**coord)
'Coordinates: 37.24N, -115.81W'

python format strings

# Basic syntax:
print(f"string {adjustable_input_1} more string {adjustable_input_2}")

# Example usage:
name = "Joe Bob"
age = 23
print(f"My name is {name} and I am {age} years old")
--> My name is Joe Bob and I am 23 years old

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

how to do formatting in python with format function

age = 36
txt = "his age is {}"
print(txt.format(age))

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

python string: .format()

# Python string арга .format() нь мөр дэх хоосон хаалт ({}) орлуулагчийг аргументуудаараа сольдог.
# Түлхүүр үгсийг орлуулагчид заасан бол аргын харгалзах нэртэй аргументуудаар солино.

msg1 = 'Fred scored {} out of {} points.'
msg1.format(3, 10)
# => 'Fred scored 3 out of 10 points.'
 
msg2 = 'Fred {verb} a {adjective} {noun}.'
msg2.format(adjective='fluffy', verb='tickled', noun='hamster')
# => 'Fred tickled a fluffy hamster.'

Python format() function uses.

# default arguments
print("Hello {}, your balance is {}.".format("Adam", 230.2346))

# positional arguments
print("Hello {0}, your balance is {1}.".format("Adam", 230.2346))

# keyword arguments
print("Hello {name}, your balance is {blc}.".format(name="Adam", blc=230.2346))

# mixed arguments
print("Hello {0}, your balance is {blc}.".format("Adam", blc=230.2346))

Python String Formatting

>>> print("He said, "What's there?"")
...
SyntaxError: invalid syntax
>>> print('He said, "What's there?"')
...
SyntaxError: invalid syntax

String Formatting Operations python

printf "%4.3e
", 1950 will give 1.950e+03

python formatting string

name = 'marcog'
number = 42
print('%s %d' % (name, number))

formatting strings in python

age = 11
my_self = "My name is Vishnu, I am " + str(age)
print(my_self)