Other than some generic containers like list, Python in its definition can also handle containers with specified data types. Array can be handled in python by module named “**array**“. They can be useful when we have to manipulate only a specific data type values.

**Operations on Array :**

**1. array(data type, value list)** :- This function is used to** create **an array with data type and value list specified in its arguments. Some of the data types are mentioned in the table below.

Type Code | C Type | Python Type | Minimum size in Bytes |
---|---|---|---|

‘b’ | signed char | int | 1 |

‘B’ | unsigned char | int | 1 |

‘u’ | Py_UNICODE | unicode character | 2 |

‘h’ | signed short | int | 2 |

‘H’ | unsigned short | int | 2 |

‘i’ | signed int | int | 2 |

‘I’ | unsigned int | int | 2 |

‘l’ | signed long | int | 4 |

‘L’ | unsigned long | int | 4 |

‘q’ | signed long long | int | 8 |

‘Q’ | unsigned long long | int | 8 |

‘f’ | float | float | 4 |

‘d’ | double | float | 8 |

**2. append() **:- This function is used to** add the value** mentioned in its arguments at the **end** of the array.

**3. insert(i,x)** :- This function is used to** add the value at the position **specified in its argument.

`# Python code to demonstrate the working of ` `# array(), append(), insert() ` ` ` `# importing "array" for array operations ` `import` `array ` ` ` `# initializing array with array values ` `# initializes array with signed integers ` `arr ` `=` `array.array(` `'i'` `, [` `1` `, ` `2` `, ` `3` `]) ` ` ` `# printing original array ` `print` `(` `"The new created array is : "` `,end` `=` `" "` `) ` `for` `i ` `in` `range` `(` `0` `, ` `3` `): ` ` ` `print` `(arr[i], end` `=` `" "` `) ` ` ` `print` `(` `"\r"` `) ` ` ` `# using append() to insert new value at end ` `arr.append(` `4` `); ` ` ` `# printing appended array ` `print` `(` `"The appended array is : "` `, end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `, ` `4` `): ` ` ` `print` `(arr[i], end` `=` `" "` `) ` ` ` `# using insert() to insert value at specific position ` `# inserts 5 at 2nd position ` `arr.insert(` `2` `, ` `5` `) ` ` ` `print` `(` `"\r"` `) ` ` ` `# printing array after insertion ` `print` `(` `"The array after insertion is : "` `, end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `, ` `5` `): ` ` ` `print` `(arr[i], end` `=` `" "` `) ` |

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Output:

The new created array is : 1 2 3 The appended array is : 1 2 3 4 The array after insertion is : 1 2 5 3 4

**4. pop() **:- This function** removes the element at the position** mentioned in its argument, and returns it.

**5. remove()** :- This function is used to** remove the first occurrence** of the value mentioned in its arguments.

`# Python code to demonstrate the working of ` `# pop() and remove() ` ` ` `# importing "array" for array operations ` `import` `array ` ` ` `# initializing array with array values ` `# initializes array with signed integers ` `arr` `=` `array.array(` `'i'` `,[` `1` `, ` `2` `, ` `3` `, ` `1` `, ` `5` `]) ` ` ` `# printing original array ` `print` `(` `"The new created array is : "` `,end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `,` `5` `): ` ` ` `print` `(arr[i],end` `=` `" "` `) ` ` ` `print` `(` `"\r"` `) ` ` ` `# using pop() to remove element at 2nd position ` `print` `(` `"The popped element is : "` `,end` `=` `"") ` `print` `(arr.pop(` `2` `)); ` ` ` `# printing array after popping ` `print` `(` `"The array after popping is : "` `,end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `,` `4` `): ` ` ` `print` `(arr[i],end` `=` `" "` `) ` ` ` `print` `(` `"\r"` `) ` ` ` `# using remove() to remove 1st occurrence of 1 ` `arr.remove(` `1` `) ` ` ` `# printing array after removing ` `print` `(` `"The array after removing is : "` `,end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `,` `3` `): ` ` ` `print` `(arr[i],end` `=` `" "` `) ` |

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Output:

The new created array is : 1 2 3 1 5 The popped element is : 3 The array after popping is : 1 2 1 5 The array after removing is : 2 1 5

**6. index()** :- This function returns the** index of the first occurrence** of value mentioned in arguments.

**7. reverse()** :- This function** reverses** the array.

`# Python code to demonstrate the working of ` `# index() and reverse() ` ` ` `# importing "array" for array operations ` `import` `array ` ` ` `# initializing array with array values ` `# initializes array with signed integers ` `arr` `=` `array.array(` `'i'` `,[` `1` `, ` `2` `, ` `3` `, ` `1` `, ` `2` `, ` `5` `]) ` ` ` `# printing original array ` `print` `(` `"The new created array is : "` `,end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `,` `6` `): ` ` ` `print` `(arr[i],end` `=` `" "` `) ` ` ` `print` `(` `"\r"` `) ` ` ` `# using index() to print index of 1st occurrenece of 2 ` `print` `(` `"The index of 1st occurrence of 2 is : "` `,end` `=` `"") ` `print` `(arr.index(` `2` `)) ` ` ` `#using reverse() to reverse the array ` `arr.reverse() ` ` ` `# printing array after reversing ` `print` `(` `"The array after reversing is : "` `,end` `=` `"") ` `for` `i ` `in` `range` `(` `0` `,` `6` `): ` ` ` `print` `(arr[i],end` `=` `" "` `) ` |

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Output:

The new created array is : 1 2 3 1 2 5 The index of 1st occurrence of 2 is : 1 The array after reversing is : 5 2 1 3 2 1

**Reference :**

https://docs.python.org/3/library/array.html#module-array

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