PyGenCon

Question 1

Variable

Answer 1

A CONTAINER that stores data/values as a specific name

ie spam = 5

Question 2

data type

Answer 2

numbers, text, booleens etc

Question 3

whitespace

Answer 3

seperates statements

whitespace means right space

Question 4

comments

Answer 4

to make code easier to follow
# for single line comment
“"”for multi line comments”””

Question 5

boolean

Answer 5

true or false statements

variables can store booleans
ie: a = true
b = false

Question 6

Python order of operation

maths PEMDAS

Answer 6

python uses PEMDAS system:
Parentheses ( …) = everything in brackets first
Exponents ** = powers (5 ^ 3 is 5x5x5). written as 5 ** 5 in python
Multiplication
Division
Addition, Subtraction

Question 7

modulo (Mod)

Answer 7

modulo returns the remainder from a division.

ie. 3%2 will return 1. 2 goes into 3 once with 1 remaining (remember the remaider is the bit modulo is interested in)

Question 8

String

Answer 8

A string is a data type which is written in “quotation marks” ie “ryan”
It can contain numbers, letters and symbols.
Each character in a string is assigned a number (the index) starting with 0.

Question 9

String method

Answer 9

lets you perform specific tasks for strings ie:
len() = length of string
str() = turns non-string into string ie. str(2) into “2”
. lower() = makes string all lowercase ie. “Ryan” .lower() into “ryan”
. upper() = makes string all uppercase

Question 10

Dot Notation

Answer 10

this is strings with dot notation in!
ie “Ryan” .upper() or “Ryan”.lower()
but it could be one of many dot .() commands

Question 11

String Concatenation

Answer 11

This is combining strings with math operators

ie print “life + of + brian” becomes life of brian

Question 12

Explicit String Conversion

Answer 12

converts non string to string ie:
print “I have” + str(2) + “coconuts!”
will print
I have 2 coconuts!

Question 13

String Formatting

Answer 13

printing a variable with a string
%s goes in the string
% goes after string
string1 = "Camelot"
string2 = "place"
print "let's not go to %s tis a silly %s" % (string1, string2)

Question 14

3 ways to create string

Answer 14

‘Ryan’
“Ryan”
str(2)

Question 15

1. print a string

2. advanced printing

Answer 15

1. print “Hello” Hello
2. g = “golf”
   h = “hotel”
   print “%s, %s” % (g, h)

golf hotel

Question 16

What are
datetime
and
datetime.now

Answer 16

datetime is a type of data (date and time).

datetime.now prints current date and time

Question 17

What are the “from” command and

“import” command

Answer 17

from = data location

import = get data

Question 18

What are hot commands and placeholders

in printing datetime context

Answer 18

placeholder = %s hot command = %
from datetime import datetime
now = datetime.now()
print '%s/%s/%s %s:%s:%s' % (now.day, now.month, now.year, now.hour, now.minute, now.second)
08/08/2014 13:56:23

Question 19

What is Control Flow

Answer 19

Enables code to make decisions

Question 20

What are the Control Flow Comparators

Answer 20

equal to ==
not equal to !=
less than <
greater than >
less than or equal to =

Question 21

What are Control Flow Expressions

Answer 21

expressions are values that can have operations like maths, boolean, if, or, and, not, nor, nand, etc.

18 >= 16
extreme expressions and comparators
(10 + 17) == 3 ** 16