Download Data Wrangling with Python: Tips and Tools to Make Your Life by Jacqueline Kazil PDF

By Jacqueline Kazil

How do you're taking your information research abilities past Excel to the following point? via studying simply enough Python to get stuff performed. This hands-on advisor exhibits non-programmers such as you find out how to procedure info that is first and foremost too messy or tough to entry. you don't want to understand something in regards to the Python programming language to start. via a variety of step by step workouts, you are going to the best way to collect, fresh, examine, and current info successfully. you will additionally observe easy methods to automate your information method, time table dossier- enhancing and clean-up projects, technique higher datasets, and create compelling tales with info to procure.

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Try entering one of Boston’s zip codes into your Python interpreter as a string and as an integer. What happens? '02108' 02108 Python will throw a SyntaxError in the second example (with the message invalid token and a pointer at the leading zero). In Python, and in numerous other lan‐ guages, “tokens” are special words, symbols, and identifiers. In this case, Python does not know how to process a normal (non-octal) number beginning with zero, meaning it is an invalid token. Floats, decimals, and other non–whole number types There are multiple ways to tell Python to handle non–whole number math.

For example, if you type in import sus instead of import sys, you will get the following output: >>> import sus Traceback (most recent call last): File "", line 1, in ImportError: No module named sus Read the last line: ImportError: No module named sus. This line tells you there is an import error, because there is no sus module in Python. Python has searched through the files on your computer and cannot find an importable Python file or folder of files called sus. If you make a typo in the code you transfer from this book, you will likely get a syntax error.

Info | 27 which one had the names of the dogs, and which held the names of the horses. With a dictionary, however, we can make this distinction clearer: animal_names = { 'cats': ['Walter', 'Ra'], 'dogs': ['Joker', 'Simon', 'Ellie', 'Lishka', 'Fido'], 'horses': ['Mr. Ed'] } Here is another way to write the same underlying values using more variables: cat_names = ['Walter', 'Ra'] dog_names = ['Joker', 'Simon', 'Ellie', 'Lishka', 'Fido'] horse_names = ['Mr. Ed'] animal_names = { 'cats': cat_names, 'dogs': dog_names, 'horses': horse_names } This line defines the variable cat_names as a list of cat names (a list of strings).

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