String Formatting lets you inject items into the string rather than chain items together using commas or string concatenation
Way of string formatting
The oldest method involves placeholders using the modulo % character
An improved technique uses the .format() string method
The newest method, introduced with python 3.6 uses formatted string literals called f string
Please read the related topic for more understanding of Python
Keywords and Identifiers
Variables and Data Types
Number in Python
Python String
String Formatting placeholders
print("I'm going to inject %s text here, and %s text here." %('some', 'more'))
Output-
I'm going to inject some text here, and more text here.
Format conversion method:
print('I am going to %s.' %'this \tbig City')
print('I am going to %r.' %'this \tbig City')
Output-
I am going to this big City. I am going to 'this \tbig City'.
String Formatting with the format() method
print('{2} {1} {0}'.format('Dzire', 'Dreams', 'Neil'))
Output-
Neil Dreams Dzire
Place holder vs Format
print('Hello %s.' %('World'))
print('Hello {p}.'.format(p='World'))
Output-
Hello World. Hello World.
Format: Inserted objects can be reused, avoiding duplication
Formatted string literals (F-String):-
name = 'Dreams'
print(f"Live for {name}.")
Output-
Live for Dreams.
num = 23.45687
print(f'Decimal number is: {num:{10}.{6}}')
Output-
Decimal number is: 23.4569
Built In Function
string.ascii_letter
Concatenation of the ascii-lowercase and ascii-uppercase constants.
string.ascii_lowcase
Concatenation of lower case letters
string.ascii_uppercase
concatenation of uppercase letters
string.digits
digits in string
string.hexdigits
Haxdigit in string
string.letter
concatenation of lowercase and uppercase
string.endswith()
Return true if a string ends with the given suffix otherwise return false
string.startwith()
Return true if a string starting with the given suffix otherwise return false
string.swapcase()
method converts all uppercase to lowercase and vice versa of the given string and returns it
replace()
return copy of the string where all occurrence of a substring is replaced with another substring.
string.isdecimal
return true if all the characters in a string are decimal
Similarly other method like Isalnum, Istitle Identifier
string.partition
Splits the string at the first occurrence of the separator and returns a tuple
string.len
Return length of string
string.rindex
Return the highest index of the sub-string inside the string if the substring is found
string.max
Return the highest alphabetical character in string
string.min
Return the minimum alphabetical character in string
string.splitlines
Return a list of lines in string
string.capitalize
return a word with its first characters capitalized
string.find
Return the lowest index in the substring
string.count
Return the number of occurrences of a substring in string
string.lower
Return a copy of string but convert to lowercase
string.split
Return a list of the word of string
string.ljust
left-justify in a field of given width
string.rjust and string.center for right justify and center jusitfy
