Shorcuts & Tricks

Question 1

Comprehensions

shortcuts

Answer 1

squares = [x**2 for x in range(10)]
squared_dict = {x: x**2 for x in range(10)}
unique_set = {x for x in 'hello world' if x != ' '}

Question 2

Ternary operator

shortcuts

Answer 2

condition = True
message = "Okay" if condition else "Not okay"

Question 3

Lambda functions

shortcuts

Answer 3

adder = lambda x, y: x + y
print(adder(2, 3))

Question 4

Using regex

shortcuts

Answer 4

import re
result = re.findall(r'\d+', 'hello 123 world 456')

Question 5

Break, continue, and pass

shortcuts

Answer 5

for i in range(5):
    if i == 2:
        continue
    elif i == 4:
        break
    print(i)

Question 6

.apply()

shortcuts

Answer 6

df['a'] = df['a'].apply(lambda x:x**2)

Question 7

Transpose

shortcuts

Answer 7

print(df.T)

Question 8

.rename

shortcuts

Answer 8

df = df.rename(columns={'a':'apple', 'b':'boy'})

Question 9

All/any

Answer 9

list1 = [True, True, False, True]
print(all(list1))
# False

list2 = [False, True, False]
print(any(list2))
# True

Question 10

Emoji

Answer 10

from emoji import emojize
print(emojize(“:thumbs_up: Python is awesome! :thumbs_up:”))

Question 11

Forward compatibility

Answer 11

from __future__ import division
print(5 / 2)
# 2.5

Question 12

Get text from newspaper articles

Answer 12

!pip install newspaper3k

from newspaper import Article
url = “http://cnn.com/2023/03/29/entertainment/the-mandalorian-episode-5-recap/index.html”
article = Article(url)
article.download()
article.parse()
article.text

Question 13

Consult Wikipedia

Answer 13

import wikipedia
# Search for a page
results = wikipedia.search(‘Python (programming language)’)
# Get the summary of the first result
summary = wikipedia.summary(results[0])
print(summary)

Question 14

zip

Answer 14

list1 = [1, 2, 3]
list2 = [‘a’, ‘b’, ‘c’]
zipped = zip(list1, list2)

for i, j in zipped:
print(i, j)
#1 a
#2 b
#3 c

Question 15

Generate unique identifier

Answer 15

Generate a random UUID

import uuid

id = uuid.uuid4()
# Print the UUID
print(id)
#6c81a22b-5839-48ec-9f2f-842d7b96c425

Question 16

pprint

Answer 16

import pprint

data = {
‘name’: ‘John’,
‘age’: 30,
‘address’: {
‘street’: ‘Main St’,
‘city’: ‘New York’,
‘state’: ‘NY’
}
}
pprint.pprint(data)