Functions Flashcards
Can a function that defines arguments be called without arguments?
When a function declares arguments, they are required.
Can a function with only keyword arguments be called without any arguments?
Keyword arguments already define defaults, which allows calling a function without them.
Can a function define arguments and keyword arguments?
Yes, but only if arguments are defined before keyword arguments.
What is the minimum number of arguments that a function can accept when you’re using variable arguments?
Variable arguments don’t have a required minimum number.
What is the syntax to declare variable arguments and variable keyword arguments?
*args, **kwargs
If you invoke a program with program.py 1 2, what does the code sys.argv[0] contain?
It contains program.py, the name of the program.
What will happen if you run the statement “1” + 2?
. It will show the error message “can only concatenate str (not “int”) to str”.
Which is the correct code for a comparison statement?
if music == pop: print(“dance now”)
The main purpose of using modules is:
Organizing code
What is the output of the following code?
> > > def party_invite(food=”chips”):
… print(“bring” + food)
party_invite()
bringchips
Which is true about file handlers?
They pass data to other functions.
They write data to the file.
They can read data from the file.
The dumps() function returns the resulting JSON data as a string.
True
here are several different HTTP request methods, also known as “verbs”. What are the two most common ones?
GET, POST
Which of the following is an invalid variable?
15
Given a loop created using while True:, how is the loop terminated?
break
What syntax is used to import objects from within modules?
from … import
What status code is expected when successful content is return from a URL request in Python?
200
Select the primary paradigm for the Python programming language.
Multi-paradigm
What does the ‘a’ file mode do when opening a file?
Opens the file for appending to the end of the file
What values in a test expression are always interpreted as false?
None and 0 are interpreted as false in Python.
What is the purpose of functions?
To make your code cleaner and less redundant
What are two ways to change variables not made in functions?
To make them global or pass them in as parameters.
How do you know you’re in a virtual environment named env?
Your console prompt has changed to start with (env) ->.
How would you get a list of installed libraries?
Run pip freeze.
How would you upgrade a package named “Flask”?
Run pip install Flask –upgrade.
You have a Pandas DataFrame named df_sales containing daily sales data. The DataFrame contains the following columns: year, month, day_of_month, sales_total. You want to find the average sales_total value. Which code should you use?
df_sales[‘sales_total’].mean()
