Computer Science

a dynamic data structure that can contain items of different data types

a sequence of characters, e.g. letters, numbers, spaces, and other symbols

the join method takes a list and joins each value in that list into one string

Writing to CSV files

Records and dictionaries

Dictionary challenge

Reading text files

Writing to text files

Reading CSV files

Careers in programming

Programming project - dictionaries I

Programming project - dictionaries II

This unit introduces pupils to the new data structures of records and dictionaries. They will develop a Caesar cipher encryption program using a dictionary as a cipher wheel. Pupils will explore how data can be read from and written to files and how this data can be used within a program.

Programming: dictionaries and data files

Each line in a CSV file represents a new {{}} or row.

Which error will this code produce?
```file = open("data.csv", "w")  
file.write([1, 2, 3])  
file.close()```

To convert a list of integers to strings, you can use the {{}}() function inside a loop.

To add a new row in a CSV file, you include the special character {{}} at the end of the string.

Each line in a CSV file is called a {{}}.

What method is used in Python to remove the character from a string?

The `split()` method turns a string into a {{}}.

What does this code do?
```line = "Aisha,0"
line = line.split(",")```

Using `read()` will read the {{}} of a file into one string.

Writing to CSV files

Lesson outcome