ChuckleQu

import pandas as pd
df = pd.read_csv('hacker_news.csv')

# 1
first_five_rows = df.head()
print(first_five_rows)
print()

# 2
last_five_rows = df.tail()

ChuckleQu

import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats
import calendar


# Numpy and Statistics
normal_array = np.random.normal(79, 15, 80)
# create a 80 numbers array forming normal distribution with μ = 79 and σ = 15

ChuckleQu

import requests
from bs4 import BeautifulSoup
url = 'https://visa.educationmalaysia.gov.my/guidelines/travel-authorisation-form-base.html'


# Lets use the requests get method to fetch the data from url

response = requests.get(url)
# lets check the status
status = response.status_code

ChuckleQu

# Creating a Class
# To create a class we need the key word class followed by the name and colon. Class name should be CamelCase.
# syntax
# class ClassName:
#   code goes here
class Person:
    pass


# Creating an Object

ChuckleQu

import requests
import re

# 1
Romeo_and_juliet = 'http://www.gutenberg.org/files/1112/1112.txt'
response = requests.get(Romeo_and_juliet)
text = response.text


def find_most_common_words(text, n):

ChuckleQu

import json
import re
# 1


def number_of_lines(txt):
    with open(txt, 'r', encoding='UTF-8') as file:
        lines = file.read().splitlines()
        num_of_lines = len(lines)
        return num_of_lines

ChuckleQu

import re
# 1
paragraph = 'I love teaching. If you do not love teaching what else can you love. I love Python if you do not love ' \
            'something which can give you all the capabilities to develop an application what else can you love.'
match1 = re.split(r' |\. ', paragraph)


paragraph_set = set(match1)

ChuckleQu

# Python uses try and except to handle errors gracefully.
# A graceful exit (or graceful handling) of errors is a simple programming idiom(习语) -
# a program detects(检测) a serious error condition and "exits gracefully", in a controlled manner as a result.
# Often the program prints a descriptive(描述性的) error message to a terminal or log(日志) as part of the graceful exit,
# this makes our application more robust(健壮的；稳健的).
# The cause of an exception(例外) is often external to the program itself.
# An example of exceptions could be an incorrect input, wrong file name, unable to find a file,
# a malfunctioning(出故障的) IO(Input Output) device.
# Graceful handling of errors prevents our applications from crashing(崩溃).

ChuckleQu

from datetime import datetime, date

# 1
now = datetime.now()
print(now)
day = now.day
month = now.month
year = now.year
hour = now.hour
minute = now.minute

ChuckleQu

from functools import reduce
import string

countries = ['Estonia', 'Finland', 'Sweden', 'Denmark', 'Norway', 'Iceland']
names = ['Asabeneh', 'Lidiya', 'Ermias', 'Abraham']
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# 1
# map(function, iterable): 对 iterable 中的每一个元素 apply function，最后输出新序列