Python Strings: Tricky Programs on Remove, Sort, and Count

Enhance your Python string manipulation skills through valuable code examples, which offer insights into various operations in Python programming.

It accepts console entries and removes specified characters from them.
The second program finds the first and second-highest numbers in a list.
The third program counts consecutive characters in a string.

Python string manipulation programs — Photo by Krivec Ales on Pexels.com

01. Remove the Character from the String Entered From the Console

inp = input("Enter the string: ")
ch = input("Enter the character to remove: ")

# Using str.replace() to remove all occurrences of the character
res = inp.replace(ch, "")

print(res)

output

inp=abc
char entered=a
out=bc

02. Find first First-highest and Second-Highest

Use the sorted method to sort in reverse order.

l = [10, 90, 40, 60, 20]

# Sort the list in descending order
sorted_list = sorted(l, reverse=True)

# First highest number
first_highest = sorted_list[0]

# Second highest number
second_highest = sorted_list[1]

print(f"First highest number: {first_highest}")
print(f"Second highest number: {second_highest}")

Output

First heighest: 90
Second heighest: 60

03. String Character/Word Count

Example:1 Char count

s = "aabbbccccaaaaa"

output = ""
count = 1

for i in range(1, len(s)):
    # Check if the current character is the same as the earlier character
    if s[i] == s[i - 1]:
        count += 1
    else:
        output += s[i - 1] + str(count)
        count = 1

# Add the last character and its count
output += s[-1] + str(count)

print(output)

Output

a2b3c4a5

Example:2 Word count

a = "I am here I am fine"

# Split the string into words
words = a.split(" ")

# Initialize an empty dictionary to store word counts
word_count = {}

# Iterate through each word in the list
for word in words:
    # If the word is already in the dictionary, increment its count
    if word in word_count:
        word_count[word] +=1
    # If the word is not in the dictionary, add it with count 1
    else:
        word_count[word] = 1

# Print the word counts
for word, count in word_count.items():
    print(f"{word} - {count}")

Output

I - 2
am - 2
here - 1
fine - 1


** Process exited - Return Code: 0 **
Press Enter to exit terminal

Example 3: Char count using collections

from collections import Counter

a = "abcabc"
count_dict = Counter(a)
print(count_dict)
out = ""

# Iterate through sorted characters to keep order
for char in sorted(count_dict):
    out += char + str(count_dict[char])

print(out)

Output

Counter({'a': 2, 'b': 2, 'c': 2})
a2b2c2


** Process exited - Return Code: 0 **
Press Enter to exit terminal

Example 4: Last word to bring the first position and keep the remaining string the same

a="My Name is Srini Here"

b=a.split(" ")

o=b[-1]+ " " + " ".join(b[0:len(b)-1]) 

print(o)

Output

Here My Name is Srini


** Process exited - Return Code: 0 **
Press Enter to exit terminal

Conclusion

These python string manipulation programs offer a deeper understanding of list sorting and character counting in Python. By working through these examples, you’ll gain practical experience and develop your programming skills.

Srini

Data Engineer with deep AI and Generative AI expertise, crafting high-performance data pipelines in PySpark, Databricks, and SQL. Skilled in Python, AWS, and Linux—building scalable, cloud-native solutions for smart applications.