Codecademy Python 1 Flashcards
Float definition
a number with a decimal
Integer definition
a number with no decimal
How to yield a float instead of an integer
Change either a numerator or denominator to be a float (add a period)
Yielding a float example
quotient 1 = 7./2
quotient 2 = 7/2.
The float method example
quotient 1 = float(7)/2
Operator for combining a string with variables
“%s” % ()
Combining string with variables example
name = “Mike”
print “Hello %s” % (name)
Operator for combining a string with variables python 3
”{}” .format ()
Combining strings with variables example Python 3
name = “Mike”
print (“Hello {}”.format (name))
Padding a variable with zeroes
%02d
Function to print the date and time in a nice format
datetime
Importing datetime
from datetime import datetime
Program to print the current date and time
now = datetime.now()
print now
Equal to
==
Not equal to
!=
Less than
Less than or equal to
<=
Greater than
>
Greater than or equal to
> =
Order of operations for Boolean operators
not, and, or
A conditional statement that does something after seeing if its expression is True
if
A statement that is run if the “if” statement is false
else
A statement that runs if the previous expression is false but the following statement is true
elif
Function to check if a string is only letters
.isalpha()
Defining a function
def
Define Function definition
Setting up a function which can then be used repeatedly
3 Components of a Function
- header
- comment (optional)
- body
Function header format
def ():
Function Header example
def hello_world():
Function comment example
“””Prints ‘Hello World!’ to the console”””
Running a function example
hello_world()
Parameter definition
a variable that is an input to a function
Parameter example
n in def square(n):
Argument definition
The value of the parameter passed into a function
Argument example
10 in square(10)
Function to import a certain function from a module
from import
Importing certain function from a module example
from math import sqrt
Function to import all variables and functions from a module
from import *
Importing all variables and functions from a module example
from math import *
Function that takes any number of arguments and returns the largest one
max()
Taking any number of arguments and returning the largest one example
max(1,2,3)
3
Function that returns the smallest of the arguments
min()
Returning the smallest argument example
min(1,2,3)
1
Function that returns the absolute value of its argument
abs()
Returning the absolute value of its argument example
abs(-42)
42
Function that returns the type of data it receives as an argument
type()
Returning the type of data it receives as an argument example
type(42)
int
Function that deletes an item from a list
.remove()
Function to remove an item at a certain index from a list
.pop()
