Writing Files

Writing Files

Writing data to text files

Multiple Select

In this lesson I am going to learn to ... ?

• Open files for writing

• Construct a csv lines from a 2D data structure

• Write csv records to a file

• Close a file

Fill in the Blanks

Data that is held in a data structure within a program is being stored in

memory.

Fill in the Blanks

The reason for writing data to a text file is so that it will be saved as

data on a backing storage device.

Multiple Select

What two characters are present at the end of every line in a data file?

• Line feed (LF)

• Carriage return (CR)

• Enter (E)

• Space (" ")

Multiple Choice

What must be the data type of all data written to a text file?

• String

• List

• Tuple

• Integer

Multiple Choice

What special 'escape' character must be added onto the end of every line of data before it is written to a file?

• '\n'

• '\t'

• '\e'

• '\cr'

Multiple Choice

What operation is shown by += in this code?

• concatenation

• repetition

• iteration

• string slicing

Multiple Choice

What file access mode is required?

A teacher wants to calculate the highest, lowest and average mark from a students' test

• 'r'

• 'w'

• 'a'

Multiple Choice

What file access mode is required?

A teacher wants to save the results from a students' test

• 'r'

• 'w'

• 'a'

Multiple Choice

What file access mode is required?

A teacher wants to save the test result of a new student who has joined the class

• 'r'

• 'w'

• 'a'

Fill in the Blanks

Type the name of a data structure ...

Fill in the Blanks

What is len(newData)?

Multiple Choice

Which is Igor's record?

• newData[0]

• newData[1]

• newData[2]

• newData[3]

Fill in the Blanks

What is newData[2][2]?

Fill in the Blanks

What is len(newData[1])?

Fill in the Blanks

Type the name of a file object ...

Fill in the Blanks

Type the name of a Python keyword ...

Fill in the Blanks

Type the name of a built-in function (no paranthesis) ...

Fill in the Blanks

Type the name of a file object method (no parenthesis)

Fill in the Blanks

Type the name of a loop variable ...

Multiple Choice

What is data type of index variable?

• int

• str

• float

• bool

Fill in the Blanks

Type the name of a string variable ...

Fill in the Blanks

Type a line number that uses concatenation ...

Fill in the Blanks

Type in a string literal (without "") ...

Multiple Choice

What type of loop starts on line 7?

• conditional

• count-controlled over a range of integers

• count-controlled over a data structure

Multiple Choice

What type of loop starts on line 9?

• conditional

• count-controlled over a range of integers

• count-controlled over a data structure

Fill in the Blanks

There are two loops shown, one inside the other. This structure is called a

loop.

Multiple Select

In this lesson I have learned to ...

• Open files for writing

• Convert a record into a CSV string

• Write a CSV string to a text file

• Close a file

Open Ended

Thinking Hard

Turn your learning from this lesson into a series of step-by-step instructions

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it