Python from Udemy DS Course

Question 1

the usual name for Human Readable Code?

Answer 1

Source Code

Question 2

A formal definition of programming?

Answer 2

Taking a task, writing it down in a programming language that the computer can understand and execute

Question 3

What is the difference between computer science and programming?

Answer 3

‘Computer science’ is about what computers CAN do.

‘Programming’ is telling a computer WHAT to do

Question 4

What are the following languages good for:
PHP
C++
Python and ‘R’

Answer 4

PHP = Web programming
C++ = programming devices
Python and ‘R’ = Data science and finance

Question 5

What is being created in the following code, and what does it do:

def plus_ten (x):
      return x + 10

Answer 5

A function called ‘plus_ten’ which takes a variable ‘x’ as input, and returns ‘x’ + 10

Question 6

Why should you learn python?

Answer 6

Powerful calculation tools, extendable, multi platform, with intuitive syntax and is easy to learn

Question 7

Give an example of something that allows Python to be used for web programming

Answer 7

The django framework

Question 8

Is python a high level or low level language?

Answer 8

Low level languages are machine code (closer to the metal)

Question 9

what sort of document has a *.ipynb extension?

Answer 9

Python Notebook Document, saved by ‘Jupyter’

Question 10

What is Jupyter and what does it does it do?

Answer 10

It store scripts, that can include human readable text, code, AND output such as graphs and results

Question 11

What is Anaconda

Answer 11

A software package that contains BOTH Python and Jupyter and PACKAGES for scientific computing and data science

Question 12

What is an operand?

Answer 12

What an operator operates on.

in ‘4 + 3’ the 4 and the 3 are operands, and the ‘+’ is an operator

Question 13

What are identity operators?

Answer 13

‘is’ and ‘is not’ function similar to == and !=

work with boolean true false as well

Question 14

what does the abs(x) function do?

Answer 14

It returns the the non-negative value of x without regard to its sign value of a number.

abs stands for ‘absolute’ number

Question 15

what does the function pow(x,y) do?

Answer 15

returns x to the power of y

Question 16

what does the function round(x,y) do?

Answer 16

returns the float of its argument (x), rounded to a specified number of digits (y) after the decimal point

Question 17

what would the following method do?

participants.extend([‘George’,’Cate’])

Question 18

How can you get help on a function?

Answer 18

either:
function?
or
help(function)

Question 19

what are ‘np’ and ‘pd’?

Answer 19

import pandas as pd:
You are importing the pandas library with an alias pd.
Instead of writing pandas.function each time, a short form pd.function is preferred.

same with import numpy as np