Variable Data Types

Introduction to Python for Finance

Adina Howe

Instructor

Python Data Types

Variable Types Example
Strings 'hello world'
Integers 40
Floats 3.1417
Booleans True or False
Introduction to Python for Finance

Variable Types

Variable Types Example Abbreviations
Strings 'Tuesday' str
Integers 40 int
Floats 3.1417 float
Booleans True or False bool
Introduction to Python for Finance

What data type is a variable: type()

To identify the type, we can use the function type():

type(variable_name)

pe_ratio = 40
print(type(pe_ratio))

<class 'int'>
Introduction to Python for Finance

Variable manipulations

x = 5
print(x * 3)

15

print(x + 3)

8

y = 'stock'
print(y * 3)

'stockstockstock'

print(y + 3)

TypeError: must be str, not int
Introduction to Python for Finance

Changing variable types

pi = 3.14159
print(type(pi))

<class 'float'>

pi_string = str(pi)
print(type(pi_string))

<class 'str'>

print('I love to eat ' + pi_string + '!')

I love to eat 3.14159!
Introduction to Python for Finance

Let's practice!

Introduction to Python for Finance

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