Python Built-in Functions and Use cases

Python Built-in Functions and Use cases

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  Python Built-in Functions andUse cases Srajan Mor
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  Integers Purpose: Digital computer canonly process data that has been expressed in binary format. That is to say 0 or 1, which can be expressed electronically as On/Off. For Information technology applications, the amount of information being processed is an important design consideration. The term bit-length is a technical shorthand for this measure. bit_length() method in python tell us the Number of bits necessary to represent an integer in binary number. .bit_length() Use Cases
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  Integers Purpose: Not only realnumbers, Python can also handle complex numbers and its associated functions. Complex numbers have their uses in many applications related to mathematics and python provides useful tools to handle and manipulate them. Complex numbers are expressed as combination of real and imaginary part. Complex number = a + bi Where ‘a’ is the real part and ‘bi’ is the imaginary part. Since integers are real numbers only, they will always return 0 when using .imag(). .real() and .imag() Use Cases
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  Integers Purpose: Whenever we aredealing with complex numbers we can use this function. This function basically removes the parenthesis from an integer. .conjugate() Use Cases .numerator() .denominator() Purpose: These function return the numerator and denominator from an integer. Since integers are without any decimals, so the denominator will always be 1.
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  Strings Purpose: At some point,we may need to beak a large string into smaller chunks or strings. This is opposite of concatenation which merges or combines string into one. To do this, we use the split function. It breaks the given string by the specified separator and then returns the output in form of a list. We need to specify a delimiter as the separator. If we do not define a delimiter, then python will split the string assuming whitespace as a separator. We can also define how many times we need python to split the string. By default there is no limit. .split() Use Cases
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  Strings Purpose: This function returnsthe capitalized version of a string. We need to note that it only capitalizes the first letter of the string. .capitalize() Use Cases .lower() and .upper() Purpose: .lower() function returns the entire string in a lower case. .upper() function returns the entire string in upper case.
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  Strings Purpose: This method formatsthe specified value and inserts them inside the string’s placeholder. A placeholder is defined using curly brackets: {}. Placeholder tell the format method the location where we need to insert a specific value. We can have multiple placeholder in a string in which we can have multiple values. This method is particularly useful when we need to pass something inside a string which is changing or is calculated. .format() Use Cases
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  Float Purpose: This function returnsa pair of integer whose ratio is exactly equal to the original float and with a positive denominator. Note that is returns the result in tuple. .as_integer_ratio() Use Cases .hex() and .fromhex() Purpose: .hex() function returns the hexadecimal representation of a floating point number. .fromhex() creates a floating point number from a hexadecimal string.
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  Float Purpose: This function checkswhether the value stored is an integer of not. Returns true if it is. .is_integer() Use Cases .imag() and .real() Purpose: Complex numbers are expressed as combination of real and imaginary part. Complex number = a + bi Where ‘a’ is the real part and ‘bi’ is the imaginary part. Since floats are real numbers only, they will always return 0 when using .imag(). .
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  Lists Purpose: This function addsa single item to the end of the list. Accordingly the length of the string increases by 1. .append() Use Cases .copy() Purpose: A list can be copied by using the ‘=‘ operator. But the problem with this is, whenever we change the old list the new list will also change. To remedy this we can use the fuction .copy() to just clone the old list. We can save this cloned list as a new list and work on it.
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  Lists Purpose: This function isdifferent from .append() as by use of this function we can add more than one element to our list. Basically we can add an iterable objects. .extend() Use Cases .index() Purpose: This function finds the given element in the list and returns its position. Note: If the same element is present more than once, this function returns the index of the first occurrence of the element. Note: Index in python starts from 0, not 1. We need to provide the element of which we want to find the index.
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  Lists Purpose: This function canused to sort list of integers, floats, strings and others. The sorting is done in ascending, descending or user defined order. .sort() Use Cases .pop() Purpose: This function removes the item at the given index from the list and returns the removed item. By default if we do not specify the item, then the function will remove the last items on list. It does not work when the index is out of bounds or out of range.