Common Commands & Functions

Question 1

del

(what does it do?)

Answer 1

deletes a variable, function, etc.

Question 2

13 Common Built in String Methods & Functions Definition & Components

Answer 2

(upper/lower, find, index, count, length, format, replace, join, split, strip, sort , capitalize, f-strings)

( 1 )

{ }.format(value) : pass value to string

print(“Learn {a} programming”.format( a = “Python”))

you can define variables within method and asine to different positions

( 2 )

.split(separator, maxsplit) : split string based on seperator, returns a list

strVal2 = “Python : PERL” splitList2 = strVal2.split(‘:’)

( 3 )

.find(searchText, start, end ) : search text from pos.

‘Learn Python’.find(‘python’): returns -1 bec. found

( 4 )

.replace(search, replace) : replace string w/ another

( 5 )

.join(iterable) : combine strings together

( 6 )

.strip( ), lstrip( ), rstrip ( ) : removes whitespace

( 7 )

.capitalize( ) : cap. the first character of string data

( 8 )

.count(search_text, start, end) : count occurence in string

( 9 )

len(string) : total num. of characters in a string

( 10 )

.index(search_text, start, end) : search text, if not foung ValueError

( 11 )

.upper( ), .lower( ) : uppercase, lowercase string

( 12 )

f-string : add { }.format( ) directly into the string

name = “Jose”

print( f ‘Hello, my name is { name }’)

( 13 )

.sort(reverse, key) : sorts objects in alphabetical order in a string (args. are optional)

Question 3

11 Common Built-In Dictionary Methods

(4) return/remove all components
(5) return/remove some components
(2) replicate or update the dictionary

Answer 3

Return/Remove All Components:

.keys( ) - shows all keys in a dictionary

.values( ) - shows all values

.items( ) - shows all pairings

.clear( ) - removes all dictionary elements

Return/Remove Individual Components:

.fromkeys( ) - returns a dictionary with the specified keys and values

.get( ) - returns value of the specified key

.pop( ) - removes the element with the specified key

.popitem( ) - removes last inserted key-value pair

.setdefault( ) - reutrns value from a specified key, and if key does not exist, inserts the key

Replicate/Update:

.copy( ) - copies a dictionary

.update( ) - updates the dictionary with the specified key-value pairs

Question 4

11 Common Built-In List Methods

(3) update list
(3) remove elements
(2) arrange elements
(2) identify & count elements
(1) replicates a list

Answer 4

Update List:

.append( ) - Adds an element at the end of the list

.extend( ) - Add the elements of a list (or any iterable), to the end of the current list

.insert( ) - Adds an element at the specified position

Remove Elements From a List:

.clear( ) - Removes all the elements from the list

.pop( ) - Removes the element at the specified position

.remove( ) - Removes the first item with the specified value

Arranges List Elements:

.reverse( ) - Reverses the order of the list

.sort( ) - Sorts the list

Identify List Elements/Number of Elements:

.index( ) - Returns the value or list of values based on its order location within a list, index starts at zero

.count( ) - Returns the number of elements with the specified value

Replicate List

.copy( ) - Returns a copy of the list

Question 5

2 Tuple Methods

Answer 5

.count( ) - returns number of times a value occurs

.index( ) - identifies items

Question 6

8 Common Built-In Set Methods

(5) Edit/Remove Elements
(2) Remove/Duplicate All Elements
(4) Perform Operations Between Elements

Answer 6

Edit/Remove Elements from Set:

.add( ) - Adds an element to the set

.discard( ) - Remove the specified item

.pop( ) - Removes an element from the set

.remove( ) - Removes the specified element

.update( ) - Update the set with another set, or any other iterable

Remove/Duplicate All Elements from Set

.clear( ) - Removes all the elements from the set

.copy( ) - Returns a copy of the set

Operations Between Two Different Sets:

.intersection( ) - Returns a set, that is the intersection of two other sets

.difference( ) - Returns a set containing the difference between two or more sets

.symmetric_difference( ) - Returns a set with the symmetric differences of two sets

.union( ) - Return a set containing the union of sets

Question 7

type conversion functions in python

Answer 7

• ascii() Returns a string containing a printable representation of an object
• bin() Converts an integer to a binary string
• bool() Converts an argument to a Boolean value
• chr() Returns string representation of character given by integer argument
• complex() Returns a complex number constructed from arguments
• float() Returns a floating-point object constructed from a number or string
• hex() Converts an integer to a hexadecimal string
• int() Returns an integer object constructed from a number or string
• oct() Converts an integer to an octal string
• ord() Returns integer representation of a character
• repr() Returns a string containing a printable representation of an object
• str() Returns a string version of an object
• type() Returns the type of an object or creates a new type object

Question 8

type( ) function

Answer 8

returns the objects data type

Question 9

reversed( ) function

Answer 9

returns the reversed iterator of a given sequence

ex. can be used to reverse the order in a for loop, instead of starting at the first item in a list, you start at the last item

Question 10

next( )

Answer 10

returns the next item in an iterator

Question 11

iter( )

Answer 11

converts an object into a iterator

(allows object to be iterated one element at a time)