Some Basic Python String Programs-2

Python Program to split a string into groups of n consecutive characters

string = "Beta Python: Python for U"
n = 5
split_string = [(string[ch:ch+n]) for ch in range(0, len(string), n)] #list comprehension 
print(split_string)
#Output: ['Beta ', 'Pytho', 'n: Py', 'thon ', 'for U']

string = "Beta Python: Python for U"

n = 5

split_string = [(string[ch:ch+n]) for ch in range(0, len(string), n)] #list comprehension

print(split_string)

#Output: ['Beta ', 'Pytho', 'n: Py', 'thon ', 'for U']

List comprehension is a compact method that defines a list and its contents at the same time. Its basic syntax consists of a square bracket with an expression that is executed for each element along with for loop to iterate over each element. Read more: List Comprehension in Python – Explained with Examples

Python Program to check if a string is a subset of another string

str1 = "Beta Python: Python for U"
str2 = "tPoU"

#using all() 
subset1 = all(ele in str1 for ele in str2)
if subset1: 
    print(f"\'{str2}\' is a subset of \'{str1}\'")
else:
    print(f"\'{str2}\' is not a subset of \'{str1}\'")
#Output: 'tPoU' is a subset of 'Beta Python: Python for U'

#using issubset()
subset2 = set(str2).issubset(str1)
if subset2: 
    print(f"\'{str2}\' is a subset of \'{str1}\'")
else:
    print(f"\'{str2}\' is not a subset of \'{str1}\'")
#Output: 'tPoU' is a subset of 'Beta Python: Python for U'

str1 = "Beta Python: Python for U"

str2 = "tPoU"

#using all()

subset1 = all(ele in str1 for ele in str2)

if subset1:

print(f"\'{str2}\' is a subset of \'{str1}\'")

else:

print(f"\'{str2}\' is not a subset of \'{str1}\'")

#Output: 'tPoU' is a subset of 'Beta Python: Python for U'

#using issubset()

subset2 = set(str2).issubset(str1)

if subset2:

print(f"\'{str2}\' is a subset of \'{str1}\'")

else:

print(f"\'{str2}\' is not a subset of \'{str1}\'")

#Output: 'tPoU' is a subset of 'Beta Python: Python for U'

The all() built-in method returns True If all the elements in the iterable passed are true else it returns False.
Python treats everything as an object and objects are always true in python. However, null values, None, 0, empty data types are observed as false in python.
The format() built-in string method returns a formatted representation of the string controlled by the format specifier. The prefix f before a string tells Python that the string is a format string. The replacement fields are expressions enclosed in curly brackets in a format string. They are evaluated at run time and then formatted.
The backslash (“\”) character used as escape characters, directs the compiler to take a suitable action mapped to character prefixed with it.
The issubset() built-in method returns True if all the elements of a set are present in the iterable passed else it returns False.

Python Program to remove multiple empty spaces from a string List

str_list1 = ['Beta ', " " ,'Python', "", ":", 'Python ', " ", 'for', " ", " ", " U"] 
str_list2 = [ele for ele in str_list1 if ele.strip()]
print(str_list2)
#Output: ['Beta ', 'Python', ':', 'Python ', 'for', ' U']

str_list1 = ['Beta ', " " ,'Python', "", ":", 'Python ', " ", 'for', " ", " ", " U"]

str_list2 = [ele for ele in str_list1 if ele.strip()]

print(str_list2)

#Output: ['Beta ', 'Python', ':', 'Python ', 'for', ' U']

The strip() built-in string method removes any spaces present at the beginning and the end of the string.

Python program to count words in a sentence

string = "Beta Python: Python for U"
words_count = len(string.split())
print(words_count)
#Output: 5

string = "Beta Python: Python for U"

words_count = len(string.split())

print(words_count)

#Output: 5

The split() built-in method breaks up a string by the specified separator and returns a list of strings. If a separator is not specified then white space is considered as a separator.
The len() built-in function returns the number of elements present in a container.

Python program to add leading Zeros to a string

str1 = "BetaPython"

#using rjust()
str2 = str1.rjust(5 + len(str1), '0')
print(str2)
#Output: 00000BetaPython

#using zfill()
str3 = str1.zfill(5 + len(str1))
print(str3) 
#Output: 00000BetaPython

str1 = "BetaPython"

#using rjust()

str2 = str1.rjust(5 + len(str1), '0')

print(str2)

#Output: 00000BetaPython

#using zfill()

str3 = str1.zfill(5 + len(str1))

print(str3)

#Output: 00000BetaPython

The rjust() built-in string method returns a new string of given length after filling the remaining space on the left side of the original string with the character specified.
The zfill() built-in string method returns a copy of the string with ‘0’ characters padded to the left side of the original string.

Python program to add trailing Zeros to a string

str1 = "BetaPython"
 
#using ljust() 
str2 = str1.ljust(5 + len(str1), '0') 
print(str2) 
#Output: BetaPython00000

#using format()
str3 = '{:<015}'.format(str1)
print(str3) 
#Output: BetaPython00000

str1 = "BetaPython"

#using ljust()

str2 = str1.ljust(5 + len(str1), '0')

print(str2)

#Output: BetaPython00000

#using format()

str3 = '{:<015}'.format(str1)

print(str3)

#Output: BetaPython00000

The ljust() built-in string method returns a new string of given length after filling the remaining space on the right side of the original string with the character specified.
The operator ‘<‘ is used to left-align the string and fill the remaining space of the length given with the character specified.

Python program to Right and Left Shift characters in a String

str1 = "Beta Python: Python for U"
r_swift = 4
l_swift = 3

#using * operator
str2 = (str1 *3)[len(str1) + r_swift - l_swift: 2 * len(str1) + r_swift - l_swift] #selectively slicing the string to get required string
print(str2) 
#Output: eta Python: Python for UB

#using % operator
pos = (r_swift - l_swift) % len(str1) #the mod of the right swift and the left swift difference with length computes the string positions
str3 = str1[pos:] + str1[: pos]
print(str3) 
#Output: eta Python: Python for UB

str1 = "Beta Python: Python for U"

r_swift = 4

l_swift = 3

#using * operator

str2 = (str1 *3)[len(str1) + r_swift - l_swift: 2 * len(str1) + r_swift - l_swift] #selectively slicing the string to get required string

print(str2)

#Output: eta Python: Python for UB

#using % operator

pos = (r_swift - l_swift) % len(str1) #the mod of the right swift and the left swift difference with length computes the string positions

str3 = str1[pos:] + str1[: pos]

print(str3)

#Output: eta Python: Python for UB

The ‘*’ is used to repeat the string for a given number of times when used with a string type.
Slicing extracts a subset of elements from a sequence. It mainly uses three parameters strat, stop, and step enclosed in square brackets []. Read more: Slicing in python
The ‘%’ operator(modulus operator) returns the remainder of the left operand by the right.
The ‘+’ operator concatenates multiple strings to a single string.

Python4U

Some Basic Python String Programs-2

Python Program to split a string into groups of n consecutive characters

Python Program to check if a string is a subset of another string

Python Program to remove multiple empty spaces from a string List

Python program to count words in a sentence

Python program to add leading Zeros to a string

Python program to add trailing Zeros to a string

Python program to Right and Left Shift characters in a String

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Python Program to split a string into groups of n consecutive characters

Python Program to check if a string is a subset of another string

Python Program to remove multiple empty spaces from a string List

Python program to count words in a sentence

Python program to add leading Zeros to a string

Python program to add trailing Zeros to a string

Python program to Right and Left Shift characters in a String

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