Reading files into collections¶ Let us understand how to read data from files into collections. Python have simple and yet rich APIs to perform file I/O We can create a file object with open in different modes (by default read only mode) To read the contents from the file into memory, we have APIs on …
Manipulating Collections using Loops¶ Let us understand how to manipulate collections using loops. We will be performing quite a lot of tasks to get enough programming practice. Reading files into collections Overview of Standard Transformations Row level transformations Getting unique elements Filtering Data Preparing Data Sets Quick Recap of Dict Operations Performing Total Aggregations Performing …
Sorting dict items¶ Let us understand how we can sort the dict items in Python. dict is nothing but group of key value pairs where keys are unique. sorted on dict returns only sorted keys. In [7]: famous_players = { ‘Pete Sampras’: ‘Tennis’, ‘Sachin Tendulkar’: ‘Cricket’, ‘Brian Lara’: ‘Cricket’, ‘Diego Maradona’: ‘Soccer’, ‘Roger Federer’: ‘Tennis’, ‘Ian …
Process dict values¶ Let us understand how we can process the values in dicts. We have already seen a function called as values which return all the values as a list like object. In [1]: order_item_subtotals = { 1: 299.98, 2: 199.99, 3: 250.0, 4: 129.99 } In [2]: order_item_subtotals Out[2]: {1: 299.98, 2: 199.99, 3: 250.0, …
List of dicts¶ Let us see an example of how we can read data from a file into list of dicts using Python as programming language.* When we read data from a file into a list, typically each element in the list will be of type binary or string. We can convert the element into …
List of tuples¶ Let us see an example of how we can read data from a file into list of tuples using Python as programming language.* When we read data from a file into a list, typically each element in the list will be of type binary or string. We can convert the element into …
