Prologue -- Python programming for biology -- A beginners´guide -- Python basics -- Program control and logic -- Functions -- Files -- Object Orientation -- Object data modeling -- Mathematics -- Coding tips -- Biological sequences -- Pairwise sequence alignments -- Multiple - sequence alignments -- Sequence variation and evolution -- Macromolecular structures -- Array data -- High-throughput sequence analyses -- Images -- Signal prcessing -- Databases -- Probability -- Statistics -- Clustering ans discrimination -- Machine learning -- Hard problems -- Graphical Interfaces -- Improving speed.