Iterators

hw12/README.md

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+# HW12 - Iterators and generators
+
+This homework is about working with iterators and generators.
+## Data: 
+* **sequences.fa:** file with 10 nucleotide sequences in FASTA format
+* **sequences_broken.fa:** the same file but without first record id (needed for validation)
+* **sequences.faa:** file with 10 amino acid sequences in FASTA format
+
+## Task 1
+Write a generator which reads FASTA file and outputs record id (starting from '>' character) and sequence 
+
+## Task 2
+Write class for reading sequences from FASTA file and outputing them with some changes in infinite cycle.<br>
+This class works with amino acid sequences as well as with nucleotide sequences.<br>
+Following changes (mutations) per sequence are allowed:
+* Substitution
+* Insertion
+* Deletion
+
+Also it is possible to set for each type of mutation its probability of emergence.
+
+## Task 3
+Write generator ***iter_append(iterable, item)*** which appends ***item*** to the end of ***itearable*** object.<br>
+So, during iterations we will, firstly, obtain data from ***iterable*** and only then from ***item***.<br>
+It is not allowed to use any loops (for, while, etc.)
+
+## Task 4
+Write function unpacking elements of nested list into a new one (not nested).