Module 6: Files

Question 1

A ________ is a sequence of ______ which are numbers each between 0 and 255.

Answer 1

file, byte

Question 2

The meaning of the bytes depends on the _______ of the file.

Answer 2

format

Question 3

In a _______ file each byte or group of bytes corresponds to a number, letter, punctuation mark or special character.

Answer 3

text

Question 4

When a text file is open, it is an ________ which gives the contents of the file, one time at a time.

Answer 4

iterable

Question 5

To read a text file, must first ______ and later ______ it.

Answer 5

open
close

Question 6

Use the pattern _____ ___________ ____ ________ to open the file, then in a code block use iterable ________. This will automatically _______ the file.

Answer 6

with open(filename, ‘r’) as myfile
myfile
close

Question 7

The two arguments for open are _______ indicating ________ of the file to open and _______ to indicate what to do with the file such as ______ or _______.

Answer 7

str
name
str
read
write

Question 8

When writing text files at the end of every line there must be _______

Answer 8

‘\n’

Question 9

A ______ file is a special text file that can be looked at directly. To read these files use the _____ module.

Answer 9

CSV
csv

Question 10

To use the csv module type: with open(_____, _______) as ______

Answer 10

filename
‘r’ or ‘w’
csvfile

Question 11

The function ___________ automatically uses the first line as the names of the columns and turns the rest of the lines into dictionaries.Write statement: _________ = _________

Answer 11

csv.DictReader(csvfile)
dictreader = csv.DictReader(csvfile)
*csvfile can be anything, its what the file was renamed when it was opened

Question 12

For JSON file format, import _______ and load all the data using _________.

Answer 12

json
data = json.load(jfile)

Question 13

To dump a value to an already open file for a JSON file use __________.

Answer 13

json.dump(obj, fp)

value = object
already open file = fp

dont need to do an assignment for json.dump(obj, fp)

Question 14

In JSON files the keys can only be ________ and will convert ________ to ______.

Answer 14

str
int
str

Question 15

If indices are used for csv file it splices ________. Ex. alllines[1:] would return _________.

Answer 15

lines
all the lines of the file except the first.

Question 16

The ________ is the _______ line of a csv file and describes what fields are present in the file.

Answer 16

header
first

Question 17

Each item in a file is a _______. can use _____ or _______ to convert it.

Answer 17

str
int()
float()

Question 18

Str, int and float use _______ brackets to change the type of a value.

Answer 18

round
()

Question 19

________ files are good for rows of data whereas tree-like information is better stored in _______ files.

Answer 19

csv
json

Question 20

A _______ file can encode str, int, float, bool, None, list/dictionary.

Answer 20

JSON

Question 21

A JSON file should always contain __________, typically ______ or _______.

Answer 21

one value
list
dictionary

Question 22

__________ take a file object containing a value in JSON format and returns the value.

Answer 22

data=json.load()

Question 23

___________ takes any appropriate value and file object and writes the value to the file in JSON format.

Answer 23

json.dump

Question 24

___________ takes one iterable (from open) and returns a new iterable that gives data one line at a time. To access this use format: _________________

Answer 24

csv.reader
reader = csv.reader(csvfile)