Formatting of Strings in Python – New method V/S Old method

In this tutorial, we will be looking at how strings are formatted in accordance to wish of the user and in the demand of solution. In Python, the string formatting is still unknown to many people and many still ignore and fail to recognize the essence of string formatting. So today let’s take a look over it and see its applications in various areas.

String formatting in Python

Earlier we use the “%” symbol to format the strings which is a slightly inefficient method. . Now in updated versions of python an inbuilt method format() is used , which is very versatile and powerful tool.

Now let us look at each area application seperately.

Default printing of Strings as specified in Python

Str="{} {} {}".format('code','speedy','pavitra')

Printing in a specific order with the help of symbols in Python

Str="{f} {b} {l}".format(b='speedy',l='pavitra',f='code')

Printing in a specific order by the use of digits in Python

Str="{0} {1} {2}".format('code','speedy','pavitra')

Output:

code speedy pavitra

The binary representation of Number in Python

Str="{0:b}".format(10)

Output:   10000

Exponential representation of Number in Python

Str="{0:e}".format(165.6458)

Output: 1.656458r+02

Rounding off to decimal places in Python

Str="{0:.5f}".format(1/3)

Output: 0.33333

For left, right and center alignment of the text we can use the symbols “<“, “>”, “^” within the curly braces.

Str="{:<left_alignwidth}{:^centre_width}{:>right_alignwidth}".format('code','speedy','pavitra')

Now lets look over to the old style method i.e using “% ” operator.
For example, let us see the use of this operator in the illustration of rounding off discussed above without the use of inbuilt format() method.

Integer=12.34453

print("Integer is %2.3f" % Integer)

Output

>>> 12.344

Please also refer to ,