Notes in Python - Pythonic

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Status	Last Update	Fields
Published	05/03/2024	Combine a sequence with another:a = [11, 45, 19]b = [22, 37]
Published	05/03/2024	round() can take 1 or 2 parameters. Explain.n = 2.39393
Published	05/03/2024	What is returned by the following code: range(3,7)
Published	05/03/2024	What function is used to convert to string?3.393
Published	05/03/2024	Create a single string separated by commas.a = ['a','c','d','b']
Published	05/03/2024	How to get the absolute value of a number?n = -3.93
Published	05/03/2024	How to floor a floating point number?n = 3.29393
Published	05/03/2024	How to iterate through the key value pairs of a dictionary?colors = {'blue':(0,0,255), 'red':(255,0,0)}
Published	05/03/2024	Given a sequence how to get the following:the length of the sequencethe largest elementthe smallest elements = [12, 13, 10, 9]
Published	05/03/2024	Slice the first two elements from a sequence.l = ['a','c','d','b']
Published	05/03/2024	How to return the last element of a sequence?s =  [12, 23, 19, 45]
Published	05/03/2024	How to slice the last two elements from a sequence?s = [12, 23, 19, 45]
Published	05/03/2024	How to slice all elements from a sequence except the first and last?l = [12, - 23, -55, -88, -19, 45]
Published	05/03/2024	What slice notation would return the entire sequence?l = [12, 23, 19, 45]
Published	05/03/2024	How to slice the odd subscripted elements of a sequence?s = [13, 43, 29, 11, 99, 37, 55, 17]
Published	05/03/2024	s = [13, 43, 29, 11, 99, 37, 55, 17]Get every third element
Published	05/03/2024	How to sort a list in ascending order?s = [13, 43, 29, 11, 99, 37, 55, 17]
Published	05/03/2024	How to test that if particular value is in or not in a sequence?s  = [11, 45, 19, 22, 37]
Published	05/03/2024	Make 3 copies of the elements in a sequence and concatenate them.s = [11, 45, 19, 22, 37]
Published	05/03/2024	How to slice all but the last two elements from a sequence? l = ['a','b','c','d','e']
Published	05/03/2024	Given some sequence S:What is the difference between S.pop(), S.pop(0) and S.pop(-1) and what sequence types can pop be used with?
Published	05/03/2024	How to insert an element at the beginning of the sequence?l = [3, 9, 5]item = 7
Published	05/03/2024	Add 4 to end of the sequence.s = [1,2,3]
Published	05/03/2024	What is the best way to iterate through the elements of a sequence if you need access to the subscripts as you go?name = 'brett'
Published	05/03/2024	Print a count down from 3?
Published	05/03/2024	Create a string consisting of fifty '-' characters?
Published	05/03/2024	How to count the occurences of a "tw" within a string?s = 'two twits twittered twenty tweets'
Published	05/03/2024	How to get the index of the first occurence of a substring within a string?s = 'i like eggs but eggs are high in cholesterol''eggs''celery'
Published	05/03/2024	How to split a string into tokens using the character ',' as a delimeter?s = 'al,fl,tn,ga,sc,ms'
Published	05/03/2024	Given a list of elements:s = [13, 43, 99, 20, 45]How to rearrange the elements of the list in random order?
Published	05/03/2024	How to randomly choose one element from the sequence?s = [13, 43, 99, 20, 45]
Published	05/03/2024	Remove the whitespace from both sides of the string?s = '         brett     &nbs…
Published	05/03/2024	Given two variables, x and y:What is the simplest way to swap the value of these two variables (one line)?x = 5y = 9
Published	05/03/2024	Name 2 ways to reverse the order of the elements of this list?l =  [10, 44, 29, 30, 12, 99]
Published	05/03/2024	Ccreate a sublist consisting of the elements of a list wich are evenly divisible by 6? l = [4, 6, 18, 32, 24, 20, 42, 16, 54, 96, 112]1. Use…
Published	05/03/2024	Define 3 variables, x, y and z and initialize them to zero (one line).
Published	05/03/2024	Perform floored division on 8 by 5
Published	05/03/2024	How to compute 2 to the 5th power?
Published	05/03/2024	Assign a = 1, b = 2, c = 3.Use unpacking.
Published	05/03/2024	for ... :else:
Published	05/03/2024	Exception Coding
Published	05/03/2024	Create a string representation of an object. Name 2 ways.l = ['a', 'c', 'd', 'b']
Published	05/03/2024	recursion
Published	05/03/2024	Make each world title case. Use map.s = ['hi', 'there']
Published	05/03/2024	Polymorphism
Published	05/03/2024	Modify the list so that the first letter of each word is capitalized(title case) for each string in the list.Use map.names = ['leonhard euler', 'paul …
Published	05/03/2024	LEGB Rule
Published	05/03/2024	Create a list adds 10 to each value 0:5.Use list comprehension.
Published	05/03/2024	%d
Published	05/03/2024	%s
Published	05/03/2024	reset
Published	05/03/2024	pandas
Published	05/03/2024	L = [3,2,1,0]L.index(1)
Published	05/03/2024	Count number of "1"sl = [3,2,1,0,1,2,3]
Published	05/03/2024	L = [3,2,1,0,1,2,3]L.remove(2)
Published	05/03/2024	l = [_**2 for _ in range(5)]
Published	05/03/2024	apply ord function to each element of spam
Published	05/03/2024	help(str.split)
Published	05/03/2024	find is a string method.What is the similar method for lists?
Published	05/03/2024	Convert string litteral to ASCII code. Use map.s = 'spam'
Published	05/03/2024	create arg variable and pass in to range function
Published	05/03/2024	check for s object in global variables
Published	05/03/2024	Find square root of 16
Published	05/03/2024	Create list of 6 random numbers between 1 and 10
Published	05/03/2024	Compare two numbersx = 1y = 2
Published	05/03/2024	Get last word in a strings = "I like eggs."
Published	05/03/2024	Interate and print contents of winewines = {2011:'White', 2009:'Red'}
Published	05/03/2024	find current working directory
Published	05/03/2024	automaically change working directory to directory were script is
Published	05/03/2024	Everything in Python is an ______
Published	05/03/2024	Everything in Python can grouped in a ____.
Published	05/03/2024	r"hello\n world"
Published	05/03/2024	Create a generator object with indexes and go through first 2 itemscolors = ['blue', 'red', 'green']
Published	05/03/2024	Find the current version of numpy
Published	05/03/2024	Returns True when an argument is true,False otherwise. eg: 0>1
Published	05/03/2024	reload module/file named temp.py
Published	05/03/2024	define n as a fraction,14/3
Published	05/03/2024	repr
Published	05/03/2024	bytearray
Published	05/03/2024	one liner: remove whitespace & commasreturn lista = 'aaa, bbb, ccccc, dd     '
Published	05/03/2024	__foo__
Published	05/03/2024	r'C:\text\new'
Published	05/03/2024	calculate execution time
Published	05/03/2024	What is __init__.py used for?
Published	05/03/2024	When is pass used for?
Published	05/03/2024	What is a docstring?
Published	05/03/2024	Given the list below remove the repetition of an element.All the elements should be unique:words = ['one', 'one', 'two', 'three', 'three', 'two']
Published	05/03/2024	Remove the whitespaces from the string.s = 'aaa bbb ccc ddd eee'1) Use split and join2) Use filter
Published	05/03/2024	sorted() is a _________
Published	05/03/2024	Sort the list below based on lower case values:s = ['This', 'is', 'a', 'test', 'string', 'from', 'Andrew']
Published	05/03/2024	Get last record from the following list:student_info = [('john', 'A', 15), ('jane', 'B', 12), ('dave', 'B', 10)]
Published	05/03/2024	Sort the following list by age:student_info = [('john', 'A', 15), ('jane', 'B', 12), ('dave', 'B', 10)]
Published	05/03/2024	Create a Student Class that has name, grade, and age. Create one instance of a student.
Published	05/03/2024	__str__
Published	05/03/2024	__repr__
Published	05/03/2024	Find time of function.range(100)
Published	05/03/2024	Create a generator expression for squares.
Published	05/03/2024	Loop through in reverse alphabetical order
Published	05/03/2024	Sort by length of wordcolors = ['red', 'green', 'blue', 'yellow']
Published	05/03/2024	Create an iterable object from 1 to 10
Published	05/03/2024	Interate through keys in dictionaryd = {'matthew': 'blue', 'rachel': 'green', 'raymond': 'red'}
Published	05/03/2024	Remove all key/value pairs that have keys that starts with r.d = {'matthew': 'blue', 'rachel': 'green', 'raymond': 'red'} #=> {…
Published	05/03/2024	Create a dictionary where keys are index values and values are names.names = ['matthew', 'rachel', 'raymond']
Published	05/03/2024	Create a set of ASCII codes for 'spaaaam'1) use set comprehsion2) use set function (hint: use map function also)
Published	05/03/2024	A set is like dictionary but ____
Published	05/03/2024	Create a dictionary of letters and ASCII codes'spaaaaam'
Published	05/03/2024	Get sorted list of keysd = { 'c': 3, 'a': 1, 'd':4, 'b': 2}
Published	05/03/2024	Find intersection using operatorx = set('spam')y = set('ham')
Published	05/03/2024	Find unionX = set('spam')Y = set('ham')
Published	05/03/2024	Find differenceX = set('spam')Y = set('ham')
Published	05/03/2024	{n ** 2 for n in [1, 2, 3, 4]}
Published	05/03/2024	'spam''asmp'Order-neutral equality
Published	05/03/2024	make d a decimal type
Published	05/03/2024	Create y as placeholder variable.
Published	05/03/2024	Test if l is a list using type label.l = [1,2,3]
Published	05/03/2024	Test for list type using object oriented function calll = [1,2,3]
Published	05/03/2024	Create an one liner that checks if apple, returns 'yes' or 'no'fruit = 'orange'
Published	05/03/2024	Get result if you multiply every element in a list from 1 to 10 using for loop.
Published	05/03/2024	What is virtualenv?
Published	05/03/2024	Where would you use tuples over lists?
Published	05/03/2024	What are decorators and what is their usage?
Published	05/03/2024	Shuffle list in placewords = ["python", "java", "constant", "immutable"]
Published	05/03/2024	Shuffle list of wordswords = ["python", "java", "constant", "immutable"]
Published	05/03/2024	Print pi to 2 places to the right of decimal point using string formating.
Published	05/03/2024	Test if l is a list using type definition.l = [1,2,3]
Published	05/03/2024	Multiply every element in a list from 1 to 10 by 10.Use a map expression.
Published	05/03/2024	reduce()
Published	05/03/2024	Do mutable objects such as lists, sets, and other dictionaries work as keys?
Published	05/03/2024	Create a list 'l' out of a dictionary.t = {1975: 'Holy Grail', 1979: 'Life of Brian', 1983: 'HolyGrail'}
Published	05/03/2024	Get value for (2, 3, 6) key in dict M. Return 'missing key' if key is not present.Use a dict method.M = {(2,3,6):99}
Published	05/03/2024	What are the 2 types of arguments for a function?
Published	05/03/2024	How do you check if all values in an iterable are true?
Published	05/03/2024	get max of 80, 100, 1000
Published	05/03/2024	Objects written to files have to be ____.
Published	05/03/2024	all()
Published	05/03/2024	get pwd from shell(from script)
Published	05/03/2024	run python file from ipython
Published	05/03/2024	check for presence of key in list comprehension
Published	05/03/2024	from collections import defaultdict
Published	05/03/2024	frozenset
Published	05/03/2024	import pylab
Published	05/03/2024	test is string is a numbers= "1234"
Published	05/03/2024	assign 'a = 0' using metaprogramming
Published	05/03/2024	ignore zeros
Published	05/03/2024	time something
Published	05/03/2024	import cProfile
Published	05/03/2024	get information about methods on vv = ["it's full of stars", 'elderberries', 4, 3, 3, 2]
Published	05/03/2024	turn mylist into dictionarymy_list = [("cat","dog"), ("one",1),("two",2)]
Published	05/03/2024	system call for ls
Published	05/03/2024	decorator
Published	05/03/2024	generator
Published	05/03/2024	Create variable a-d and assign them to 1-4 respectively.
Published	05/03/2024	Use Augmented Assignments to get reminder of x divided by yx = 6y = 5
Published	05/03/2024	name a variable that will NOT be imported with from module
Published	05/03/2024	Name 3 ways to multiple each element in y by 2y = [1, 2, 3]
Published	05/03/2024	write string to file
Published	05/03/2024	write a function that checks if a fruit is a apple return True or False
Published	05/03/2024	Do a case type function with:d = {'spam': 1.25, 'ham': 1.99, 'eggs': 0.99, 'bacon': 1.10}choice = 'ham'
Published	05/03/2024	get with error handlingd = {'spam': 1.25, 'ham': 1.99, 'eggs': 0.99, 'bacon': 1.10}
Published	05/03/2024	if x is true then a equals y, else a equals zx = [2] # True \| Falsey, z = 100000, -999
Published	05/03/2024	Refactor to one-linerif x:   a = yelse:    a = zGiven:x = Truey, z = 100000, -999
Published	05/03/2024	Loop through and print each pair of tuplest = [(1, 2), (3, 4), (5, 6)]
Published	05/03/2024	map takes which 2 arguments ______ & _______
Published	05/03/2024	test if object s is a strings = "1234"
Published	05/03/2024	import 3.4 printing
Published	05/03/2024	Create a dog class:shares kind = 'canine'creates unique
Published	05/03/2024	What is class variable?
Published	05/03/2024	What is operator overloading?
Published	05/03/2024	from UserDict import UserDictclass FileInfo(UserDict):    pass
Published	05/03/2024	What is the most base object in Python?
Published	05/03/2024	square each number from 1 to 10use map
Published	05/03/2024	What is the general format for list comprehensions?
Published	05/03/2024	Create all possible combinations of given lists using list comprehsions[1, 2, 3][100, 200, 300]
Published	05/03/2024	What are generator functions?
Published	05/03/2024	What are generator expressions?
Published	05/03/2024	What does yield do?
Published	05/03/2024	Give generator function below, create an instance.def gensquares(N):    for i in range(N):        yield i ** 2
Published	05/03/2024	Create a generator expression for squares of numbers
Published	05/03/2024	Force generator to produce all resultsG = (c * 4 for c in 'SPAM')
Published	05/03/2024	Create an interable object for given dictionaryd = {'a':1, 'b':2, 'c':3}
Published	05/03/2024	filter out all the elements of a listthat are mod 2 fib = [0,1,1,2,3,5,8,13,21,34,55]
Published	05/03/2024	Calculate the sum of the numbers from 1 to 100 using reduce
Published	05/03/2024	create a variable x is equal to 10 and print it interpreter
Published	05/03/2024	Refactor to be split on to 2 linesprint("Hello " + "World!")
Published	05/03/2024	Unpack data but throw away shares and pricedata = [ 'ACME', 50, 91.1, (2012, 12, 21) ]# name, shares, price, date = data
Published	05/03/2024	Unpack each character into its own variables = 'Hello'
Published	05/03/2024	create a deque with maxium length 3
Published	05/03/2024	Find 3 largest number in numsn = [1, 8, 2, 23, 7, -4, 18, 23, 42, 37, 2]
Published	05/03/2024	Create an ordered dictionary(('foo',1), ('bar',2), ('spam',3), ('grok',4))
Published	05/03/2024	get hash id y = "Hello, world!"
Published	05/03/2024	Create pairs of tuples for the give lists:l = [1,2,3,4] m = [5,6,7,8]
Published	05/03/2024	Zip list togethera = 'abc'z = 'xyz123'
Published	05/03/2024	Zip list together, pad extra spots with Nonea = 'abc'z = 'xyz1'
Published	05/03/2024	Create an interator that counts down from 150 to 125.
Published	05/03/2024	Create a struct-like object using namedtuple that has field1, field2
Published	05/03/2024	Create a class (AB) that has two simple places for variables (a, b)
Published	05/03/2024	A generator looks like a _____ but behaves like a ______.
Published	05/03/2024	create a queue from 0 to 5
Published	05/03/2024	Enumerate a list in reversea = ["foo", "bar", "baz"]
Published	05/03/2024	Write a list comprehsion that replaces zeros with 2a = [0,1,0,3]
Status	Last Update	Fields