Functions, namespace, memory management
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Required course material for the lesson
Powerpoint: Functions - this will be short as it is a reminder.
Powerpoint: Namespace.
Powerpoint: Memory management.
Video: Functions in Python
Video: Examples and identifying data types
Resource: Example code - Functions
Video: Live Coding
Subjects covered
- Short about functions
- Namespace in Python
- Memory management
Exercises to be handed in
The 2 first exercises are re-use from earlier. It is for a good purpose as will be seen later.
- Make a function fastaread(filename) which takes a filename as a parameter and returns 2 lists, first list is the headers, second list is the sequences (as single strings without whitespace). Add appropriate error handling to the function. You can test your function on the file dna7.fsa.
- Make a function fastawrite(filename, headers, sequences)' which takes a filename, a list of headers and a corresponding list of sequences as parameters and writes the fasta file. Add appropriate error handling to the function. You can test your function on the file dna7.fsa. If you first read the file with fastaread and then write a new file with fastawrite, then if the files are identicalm you know you have done right.