Assessment 3

Question 1

open a file

Answer 1

my_file = open(‘filename’, ‘access mode’)

Question 2

close a file

Answer 2

my_file.close()

Question 3

access modes for reading

Answer 3

r or rt

Question 4

access modes for writing

Answer 4

wt or w

Question 5

access modes for appending

Answer 5

at or a

Question 6

reading/writing in binary format

Answer 6

rb or wb

Question 7

return the whole file in one big string

Answer 7

file_handle.read()

Question 8

returns a single line of the file in a string each time

Answer 8

file_handle.readline()

Question 9

where does file_handle.readline() set the cursor to

Answer 9

the next line

Question 10

move the cursor manually

Answer 10

file_handle.seek()

Question 11

how to loop over a file

Answer 11

for line in file_handle:

print(line)

Question 12

writes a single string into the file

Answer 12

.write()

file_handle.write(‘dfdfdf\n’)

Question 13

writes a list of strings into the file ~ doesn’t add new line characters (or anything else) in between

Answer 13

.writelines()

Question 14

using a content manager:

Answer 14

with open(“filename”, “access mode”) as file_handle:

Question 15

when using a content manager, do I need to close it

Answer 15

no, once leaving the indentation from the header, the file is automatically closed by python

Question 16

what does buffered mean

Answer 16

files aren’t updated until you close the file object in python

Question 17

what do you put under the try block

Answer 17

you write the code that you expect may throw an error

Question 18

what do you put under the except block

Answer 18

code to execute if an error occurs

Question 19

what do I import to deal with csv files

Answer 19

import csv

Question 20

parameters for csv.reader

Answer 20

csv.reader(file_object, delimiter = ‘,’)

Question 21

what are the parameters for csv.DictReader

Answer 21

csv.DictReader(file_object,fieldnames)

Question 22

if the filename parameter for csv.DictReader is not specified

Answer 22

the keys default to the first row

Question 23

what are the parameters for csv.writer

Answer 23

csv.writer(file_object, delimiter = ‘,’, lineterminator = ‘\n’)

Question 24

how should the filenames parameter be passed in for csv.DictReader

Answer 24

reader = csv.DictReader(my_file, fieldnames = [‘word’, ‘num’])

Question 25

``` what is the data type of output with open("example.csv") as my_file: reader = csv.DictReader(my_file) output = [ line for line in reader] ```

Answer 25

list

Question 26

example of using sorted to sort a list of lists by the third index

Answer 26

sorted(aList, key = lambda x:x[2], reverse = True)

Question 27

string that groups elements together and tells python to ignore any time the delimiter appears inside

Answer 27

quotechar of a CSV file

Question 28

default value for the quotechar is :

Answer 28

double quote (")

Question 29

quotechar can be a parameter in

Answer 29

csv.reader()

Question 30

convert a listed list into a dictionary in one line

Answer 30

other_data = [{data[0][0]: i, data[0][1]:j} for i,j in data[1:J]]

Question 31

parameters for csv.DictWriter

Answer 31

csv.DictWriter(file_object, fieldnames)

Question 32

JSON stands for

Answer 32

javascript object notation

Question 33

JSON uses javascript syntax but it is

Answer 33

text only

Question 34

True and False in python are ___ in javascript

Answer 34

true and false

Question 35

None in python is ___ in javascript

Answer 35

null

Question 36

object in Json is a ___ in python

Answer 36

dict

Question 37

array in JSON is a ___ in python

Answer 37

list

Question 38

string in JSON is a ___ in python

Answer 38

str

Question 39

number (int) in JSON is a ___ in python

Answer 39

int

Question 40

number (real) in JSON is a ___ in python

Answer 40

float

Question 41

true in JSON is a ___ in python

Answer 41

True

Question 42

false in JSON is a ___ in python

Answer 42

False

Question 43

null in JSON is a ___ in python

Answer 43

None

Question 44

Json to python is called

Answer 44

deserialization

Question 45

python to JSON is called

Answer 45

serialization

Question 46

dict in python is ___ in JSON

Answer 46

object

Question 47

list, tuple in python is ___ in JSON

Answer 47

array

Question 48

str in python is ___ in JSON

Answer 48

string

Question 49

int, long, float in python is ___ in JSON

Answer 49

number

Question 50

True in python is ___ in JSON

Answer 50

true

Question 51

False in python is ___ in JSON

Answer 51

false

Question 52

None in python is ___ in JSON

Answer 52

null

Question 53

JSON module method that translates the data in a json file into a python dictionary

Answer 53

.load() | json2dict = json.load(open('jsonfilename.json', 'rt'))

Question 54

JSON module method that translates a string of JSON code, turns it into a python dictionary

Answer 54

.loads() | jsonstring2dict = json.loads('jostling')

Question 55

JSON module methods that takes a python dictionary and "dumps" it into a Json file.

Answer 55

.dump() | json.dump(the dictionary.open('jsonfile.json', 'wt')).

Question 56

what does .dump() return?

Answer 56

nothing. Instead it creates a json file in your current directory.

Question 57

JSON module methods that takes a python dictionary and turns it into a single string

Answer 57

.dumps() | dict2jsonstring = json.dumps(the dictionary)

Question 58

what is XML?

Answer 58

extensible markup language

Question 59

xml is a way to

Answer 59

store and transport data

Question 60

what is a closing tag

Answer 60

>

Question 61

a root is the

Answer 61

first unique tag

Question 62

what does an attribute tag look like with the tag name = section and attributes name and location

Question 63

what is the required import for XML

Answer 63

import xml.etree.ElementTree as ET

Question 64

how do you create an ElementTree object

Answer 64

tree = ET.parse('filename.xml')

Question 65

find the root of an xml

Answer 65

root = tree.getroot()

Question 66

get the list of tagname elements

Answer 66

taglist = treefindall("tagname")

Question 67

finding the first instance of a tagname /subtag within tagname?

Answer 67

tag.find()

Question 68

finding the text between tags?

Answer 68

tag.find().text

Question 69

create an element:

Answer 69

root = ET.Element("rootname")

Question 70

create a child element:

Answer 70

child = ET.Element("child name")

Question 71

append a child element to the root

Answer 71

(root.append(child))

Question 72

how to add attributes to your elements

Answer 72

root.attrib['attribute name'] = str(attribute value)

Question 73

add text to your elements

Answer 73

root.text = "text"

Question 74

HTML stands for

Answer 74

hypertext markup language

Question 75

difference between HTML and XML

Answer 75

XML is for data exchange/storage and HTML is mostly for Data display