File system interaction basics in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a file named 'data.txt' in read mode.

Python

file = open('data.txt', '[1]')

Drag options to blanks, or click blank then click option'

Ax

Bw

Ca

Dr

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'w' which overwrites the file.

Using 'a' which appends instead of reading.

The mode 'r' opens the file for reading. Other modes are for writing or appending.

2fill in blank

medium

Complete the code to write the string 'Hello' to a file named 'output.txt'.

Python

with open('output.txt', '[1]') as f:
    f.write('Hello')

Drag options to blanks, or click blank then click option'

Aw

Br

Ca

Drb

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'r' which is read-only.

Using 'rb' which is read binary mode.

The mode 'w' opens the file for writing and creates it if it doesn't exist.

3fill in blank

hard

Fix the error in the code to read all lines from 'log.txt' into a list.

Python

with open('log.txt', 'r') as file:
    lines = file.[1]()

Drag options to blanks, or click blank then click option'

Areadlines

Bread

Creadline

Dwrite

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'readline' which reads only one line.

Using 'write' which is for writing, not reading.

The method readlines() reads all lines into a list. readline() reads only one line.

4fill in blank

hard

Fill both blanks to create a dictionary with filenames as keys and their sizes in bytes as values.

Python

import os
files = ['a.txt', 'b.txt', 'c.txt']
sizes = { [1] : os.path.[2](f) for f in files }

Drag options to blanks, or click blank then click option'

Af

Bgetsize

Cfiles

Dexists

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'files' as key which is the whole list.

Using 'exists' which checks if file exists, not size.

Use f as the key for each filename, and os.path.getsize(f) to get the file size.

5fill in blank

hard

Fill all three blanks to filter files larger than 1000 bytes and create a dictionary with uppercase filenames as keys and sizes as values.

Python

import os
files = ['x.log', 'y.log', 'z.log']
large_files = { [1] : [2] for f in files if os.path.getsize(f) [3] 1000 }

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Af.upper()

Bos.path.getsize(f)

C>

Df.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' in filter.

Using 'f.lower()' instead of uppercase.

Using wrong function for size.

Use f.upper() for uppercase keys, os.path.getsize(f) for values, and filter with > 1000 bytes.