Python - Reading Web Data From Python

Question 1

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1. Question 1

Which of the following Python data structures is most similar to the value returned in this line of Python:

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x = urllib.request.urlopen('http://data.pr4e.org/romeo.txt')

file handle

socket

regular expression

dictionary

list

Question 2

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2. Question 2

In this Python code, which line actually reads the data?

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import socket



mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)



mysock.connect(('data.pr4e.org', 80))



cmd = 'GET http://data.pr4e.org/romeo.txt HTTP/1.0\n\n'.encode()



mysock.send(cmd)



while True:



data = mysock.recv(512)



if (len(data) < 1):



break



print(data.decode())



mysock.close()

mysock.recv()

socket.socket()

mysock.close()

mysock.connect()

mysock.send()

Question 3

1
point

3. Question 3

Which of the following regular expressions would extract the URL from this line of HTML:

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<p>Please click <a href="http://www.dr-chuck.com">here</a></p>

href="(.+)"

href=".+"

http://.*

<.*>

Question 4

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point

4. Question 4

In this Python code, which line is most like the open() call to read a file:

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import socket



mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)



mysock.connect(('data.pr4e.org', 80))



cmd = 'GET http://data.pr4e.org/romeo.txt HTTP/1.0\n\n'.encode()



mysock.send(cmd)



while True:



data = mysock.recv(512)



if (len(data) < 1):



break



print(data.decode())



mysock.close()

mysock.connect()

import socket

mysock.recv()

mysock.send()

socket.socket()

Question 5

1
point

5. Question 5

Which HTTP header tells the browser the kind of document that is being returned?

Metadata:

ETag:

HTML-Document:

Content-Type:

Document-Type:

Question 6

1
point

6. Question 6

What should you check before scraping a web site?

That the web site allows scraping

That the web site returns HTML for all pages

That the web site only has links within the same site

That the web site supports the HTTP GET command

Question 7

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7. Question 7

What is the purpose of the BeautifulSoup Python library?

It repairs and parses HTML to make it easier for a program to understand

It allows a web site to choose an attractive skin

It animates web operations to make them more attractive

It optimizes files that are retrieved many times

It builds word clouds from web pages

Question 8

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point

8. Question 8

What ends up in the "x" variable in the following code:

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html = urllib.request.urlopen(url).read()



soup = BeautifulSoup(html, 'html.parser')



x = soup('a')

A list of all the anchor tags (<a..) in the HTML from the URL

True if there were any anchor tags in the HTML from the URL

All of the externally linked CSS files in the HTML from the URL

All of the paragraphs of the HTML from the URL

Question 9

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point

9. Question 9

What is the most common Unicode encoding when moving data between systems?

UTF-16

UTF-128

UTF-64

UTF-32

UTF-8

Question 10

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10. Question 10

What is the ASCII character that is associated with the decimal value 42?

*

^

!

/

+

Question 11

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11. Question 11

What word does the following sequence of numbers represent in ASCII:

108, 105, 110, 101

ping

func

lost

line

tree

Question 12

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12. Question 12

How are strings stored internally in Python 3?

UTF-8

Unicode

Byte Code

ASCII

EBCDIC

Question 13

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point

13. Question 13

When reading data across the network (i.e. from a URL) in Python 3, what method must be used to convert it to the internal format used by strings?

upper()

find()

encode()

decode()

trim()