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Addition of a Data Structures folder in Python (It includes files for… #188

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22 changes: 22 additions & 0 deletions Python/Data Structures/Dictionary.py
Original file line number Diff line number Diff line change
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# Dictionaries are data structures formatted somewhat like a JSON document

# Ways to declare a dictionary
Dict_example = {'key1': 39, 'key2': 21, 'key3': 69}
Dict_example2 = dict(key1 = 39, key2 = 21, key3 = 69)


# Calling methods
number = Dict_example['key1']
print(number) # OUTPUT --> 39

# Changing a value of a key
Dict_example2['key1'] = 99
print(Dict_example2['key1']) # OUTPUT --> 99

# Adding keys to a dictionary
Dict_example['key4'] = 101
print(Dict_example['key4']) # OUTPUT --> 101

# Deleting keys from the existing dictionary
del Dict_example2['key3']
print(Dict_example2) # OUTPUT --> {'key1': 99, 'key2': 21}
25 changes: 25 additions & 0 deletions Python/Data Structures/Lists.py
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# Lists or Arrays are present in all main programming languages

# Declaration or creation of a list
Fruits = ["apple", "banana", "orange", "pear"]
Numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# Basic indexing ways upon lists
print(Fruits[0]) # Output --> "apple"; arrayName[index]; index = n-1 (in the list)
print(Fruits[-1], "\n") # Output --> "pear"; arrayName[index]; index = n-1 (in the list)
print(Fruits[0:3], "\n") # Output --> "apple"; "banana", "orange"; To output several values
print(Fruits[0:4:2], "\n") # Output --> "apple", "orange"; To have a skipping value

# Functions upon lists

Fruits.append("pineapple") # Adds pineapple as the last element of the list
print(Fruits, "\n")

Fruits.remove("pear") # Removes pear from the list
print(Fruits, "\n")

Fruits.insert(3, "grapes") # Inserts grapes as the fourth element of the list
print(Fruits, "\n")

del Fruits[2:4] # Deletes certain values
print(Fruits)
6 changes: 6 additions & 0 deletions Python/Data Structures/Tuples.py
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# Tuples are another type of Data Structures mainly in Python

This_is_a_tuple = ("these", "are", "values", "in", "a", "tuple") # Declaration and/or creation
word = This_is_a_tuple[0] # Accessing and/or indexing

print(word) # OUTPUT ---> these
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Any addition to this file is welcome