first commit

.gitignore

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+/.DS_Store
+/.venv

concepts/list_samples.py

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+# Simple list examples
+def print_items_in_list():
+    numbers = [1, 2, 3, 4, 5]
+    for num in numbers:
+        print(num, end=" ")
+
+############
+
+# https://www.programiz.com/python-programming/methods/list
+
+numbers = [21, 10, 54, 12]
+
+print("Before Append:", numbers)
+
+# using append method
+numbers.append(32)
+numbers.append(9)
+print("After Append:", numbers)
+
+prime_numbers = [2, 3, 5]
+print("List1:", prime_numbers)
+
+even_numbers = [4, 6, 8]
+print("List2:", even_numbers)
+
+prime_numbers.extend(even_numbers) # list1.extends(list2)
+
+print("List after append:", prime_numbers)
+
+languages = ['Python', 'Swift', 'C++']
+
+languages[2] = 'C'
+
+print(languages)  # ['Python', 'Swift', 'C']
+
+# insert method
+vowel = ['a', 'e', 'i', 'u']
+
+# 'o' is inserted at index 3 (4th position)
+vowel.insert(3, 'o')
+
+print('List:', vowel)
+
+##############
+
+
+animals = ['cat', 'dog', 'guinea pig', 'dog']
+animals.remove('dog')
+
+print('Updated animals list: ', animals)
+
+# error
+#animals.remove('fish')
+
+# Updated animals List
+print('Updated animals list: ', animals)
+
+# pop
+languages = ['Python', 'Java', 'C++', 'French', 'C']
+
+return_value = languages.pop(3)
+
+print('Return Value:', return_value)
+
+print('Updated List:', languages)
+
+languages.pop()
+print(languages)
+
+# del
+
+my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+# deleting the third item
+del my_list[2]
+
+# Output: [1, 2, 4, 5, 6, 7, 8, 9]
+print(my_list)
+
+# deleting items from 2nd to 4th
+del my_list[1:4]
+
+# Output: [1, 6, 7, 8, 9]
+print(my_list)
+
+# deleting all elements
+del my_list[:]
+
+# Output: []
+print(my_list)
+
+prime_numbers = [2, 3, 5, 7, 9, 11]
+
+# remove all elements
+prime_numbers.clear()
+
+# Updated prime_numbers List
+print('List after clear():', prime_numbers)
+
+
+# Output: List after clear(): []
+
+##############
+
+# create a list
+numbers = [2, 3, 5, 2, 11, 2, 7]
+
+count = numbers.count(2)
+
+print('Count of 2:', count)
+
+prime_numbers = [2, 3, 5, 7]
+
+prime_numbers.reverse()
+
+print('Reversed List:', prime_numbers)
+
+prime_numbers = [11, 3, 7, 5, 2]
+
+# sorting the list in ascending order
+prime_numbers.sort()
+
+print(prime_numbers)
+
+vowels = ['e', 'a', 'u', 'o', 'i']
+
+vowels.sort(reverse=True)
+print('Sorted list (in Descending):', vowels)
+
+#########
+
+# https://www.programiz.com/python-programming/examples/list-slicing
+
+Lst = [50, 70, 30, 20, 90, 10, 50]
+
+# Display list
+print(Lst[1:5]) # from index 1 till index 4
+
+# Initialize list
+List = [1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+# Show original list
+print("\nOriginal List:\n", List)
+
+print("\nSliced Lists: ")
+
+# Display sliced list
+print(List[3:9:2])
+
+# Display sliced list
+print(List[::2])
+
+print(List[::])
+
+# String slicing
+String = 'CodingIsFun'
+
+# Using indexing sequence
+print(String[1:5])
+
+
+#########
+
+
+# input values to list
+list1 = [12, 3, 4, 15, 20]
+
+for elem in list1:
+    print(elem)
+
+list1.sort()
+
+print(list1)
+
+colors = ["Red", "Black", "Pink", "White"]
+
+colors.append("Blue")  # add --> insert
+colors.append("Orange")
+
+for color in colors:
+    print(color)
+
+
+print(len(colors))
+
+for i in range(len(colors)):
+    print(colors[i])
+
+if "Grey" in colors:
+    print("Yes, present")
+
+
+list2 = []
+
+list2.append("Abc");
+
+print(list2)
+
+#######
+
+
+
+
+
+
+

concepts/strings_samples.py

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+# This file contains all the samples for strings related usecase
+
+
+# partition the string
+# the below returns a tuple with "best" " " "technical interview prep course"
+
+input_words = "best technical interview prep course"
+print(input_words.partition(" "))
+##############################################################
+
+str = "abcdac"
+
+substr = "xda"
+
+print(str.find(substr)) #
+
+
+
+# .join() with lists
+numList = ['1', '2', '3', '4']
+
+print(' | '.join(numList)) # "1 | 2 | 3, 4"
+
+
+cars = "BMW-Telsa-Range Rover"
+
+# split at '-'
+print(cars.split("-"))
+
+
+words = "cats dogs lions"
+print(words.split())
+
+#################
+# https://www.programiz.com/python-programming/methods/string
+# https://www.programiz.com/python-programming/methods/string/split
+
+text = 'bat ball'
+
+print(len(text))
+
+# replace 'ba' with 'ro'
+replaced_text = text.replace('ba', 'ro')
+print(replaced_text)
+
+song = 'Let it be, let it be, let it be, let it be'
+
+# replacing only two occurrences of 'let'
+print(song.replace('let', "don't let", 2))
+
+message = 'python is popular programming language'
+
+# number of occurrence of 'p'
+print('Number of occurrence of p:', message.count('p'))
+
+# Output: Number of occurrence of p: 4
+
+quote = 'Let it be, let it be, let it be'
+
+# first occurance of 'let it'(case sensitive)
+result = quote.find('let it')
+print("Substring 'let it':", result)
+
+# find returns -1 if substring not found
+result = quote.find('small')
+print("Substring 'small ':", result)
+
+# How to use find()
+if (quote.find('be,') != -1):
+    print("Contains substring 'be,'")
+else:
+    print("Doesn't contain substring")
+
+
+
+quote = 'Do small things with great love'
+
+# Substring is searched in 'hings with great love'
+print(quote.find('small things', 10))
+
+# Substring is searched in ' small things with great love'
+print(quote.find('small things', 2))
+
+# Substring is searched in 'hings with great lov'
+print(quote.find('o small ', 10, -1))
+
+# Substring is searched in 'll things with'
+print(quote.find('things ', 6, 20))
+
+####
+
+# .join() with lists
+numList = ['1', '2', '3', '4']
+separator = ', '
+print(' | '.join(numList)) # "1 | 2 | 3, 4"
+
+# .join() with tuples
+numTuple = ('1', '2', '3', '4')
+print(separator.join(numTuple))
+
+s1 = 'abc'
+s2 = '123'
+
+# each element of s2 is separated by s1
+# '1'+ 'abc'+ '2'+ 'abc'+ '3'
+print('s1.join(s2):', s1.join(s2))
+
+# each element of s1 is separated by s2
+# 'a'+ '123'+ 'b'+ '123'+ 'b'
+print('s2.join(s1):', s2.join(s1))
+
+# first string
+firstString = "PYTHON IS AWESOME!"
+
+# second string
+secondString = "PyThOn Is AwEsOmE!"
+
+if(firstString.lower() == secondString.lower()):
+    print("The strings are same.")
+else:
+    print("The strings are not same.")
+
+sentence = "i love PYTHON"
+
+# converts first character to uppercase and others to lowercase
+capitalized_string = sentence.capitalize()
+
+print(capitalized_string)
+
+# Output: I love python
+
+
+message = 'Python is fun'
+
+print(message.startswith('Python'))
+
+
+#######
+
+message = 'Python is fun'
+
+print(message.startswith('Python'))
+
+cars = 'BMW-Telsa-Range Rover'
+
+# split at '-'
+print(cars.split('-'))
+
+text= 'Love thy neighbor'
+
+# splits at space
+print(text.split())
+
+grocery = 'Milk, Chicken, Bread'
+
+# splits at ','
+print(grocery.split(', '))
+
+# Splits at ':'
+print(grocery.split(':'))
+
+######

helloworld.py

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+print("hello world")