Python for Data Science: Cheat Sheet

x = 5

Variable Assignment

x=5

x+2

7

Calculations With Variables

Sum of two variables

x=5

x-2

3

Calculations With Variables

Subtraction of two variables

x=5

x*2

10

Calculations With Variables

Multiplication of two variables

x=5

x**2

25

Calculations With Variables

Exponentiation of two variables

x=5

x%2

1

Calculations With Variables

Remainder of two variables

x=5

x/float(x)

2.5

Calculations With Variables

Division of two variables

str()

Types and Type Conversion

'5', '3.45', 'True' (Variables to strings)

int()

Types and Type Conversion

5, 3, 1 (Variables to integers)

float()

Types and Type Conversion

5.0, 1.0 (Variables to floats)

bool()

Types and Type Conversion

True, True, False (Variables to booleans)

help(str)

Syntax to Asking For Help

Strings

my_string = 'thisStringIsAwesome'

my_string 'thisStringIsAwesome'

String Operations

>>> my_string * 2

'thisStringIsAwesomethisStringIsAwesome'

>>> my_string + 'Innit'

'thisStringIsAwesomeInnit'

>>> 'm' in my_string

True

String Indexing

>>> my_string[3]

>>> my_string[4:9]

my_string.upper()

String Methods

String to uppercase

my_string.lower()

String Methods

String to lowercase

my_string.count('w')

String Methods

Count String elements

my_string.replace('e', 'i')

String Methods

Replace String elements

my_string.strip()

String Methods

Strip whitespaces