Introduction to string manipulation

Regular Expressions in Python

Maria Eugenia Inzaugarat

Data Scientist

You will learn

String manipulation
- e.g. replace and find specific substrings
String formatting
- e.g. interpolating a string in a template
Basic and advanced regular expressions
- e.g. finding complex patterns in a string

Clean dataset to prepare it for text mining or sentiment analysis
Process email content to feed a machine learning algorithm that decides whether an email is spam
Parse and extract specific data from a website to build a database

my_string = "This is a string"
my_string2 = 'This is also a string'

my_string = 'And this? It's the wrong string'

my_string = "And this? It's the correct string"

my_string = "Awesome day"

len(my_string)

str(123)

'123'

my_string1 = "Awesome day"
my_string2 = "for biking"

print(my_string1+" "+my_string2)

Awesome day for biking

my_string = "Awesome day"

print(my_string[3])

print(my_string[-1])

my_string = "Awesome day"
print(my_string[0:3])

Awe

print(my_string[:5])
print(my_string[5:])

Aweso
me day

my_string = "Awesome day"
print(my_string[0:6:2])

Aeo

print(my_string[::-1])

yad emosewA

Regular Expressions in Python