How to make choices in python
In our last lesson, we discovered something suspicious was going on in our inflammation data by drawing some plots. How can we use Python to automatically recognize the different features we saw, and take a different action for each? In this lesson, we’ll learn how to write code that runs only when certain conditions are true. ConditionalsWe can ask Python to take different actions, depending on a condition, with an
The second line of this code uses the keyword Conditional statements don’t have to include an
We can also chain several tests together using
Note that to test for equality we use a double equals sign
We can also combine tests using
while
Checking our DataNow that we’ve seen how conditionals work, we can use them to check for the suspicious features we saw in our inflammation data. We are about to use functions provided by the From the first couple of plots, we saw that maximum daily inflammation exhibits a strange behavior and raises one unit a day. Wouldn’t it be a good idea to detect such behavior and report it as suspicious? Let’s do that! However, instead of checking every single day of the study, let’s merely check if maximum inflammation in the beginning (day 0) and in the middle (day 20) of the study are equal to the corresponding day numbers.
We also saw a different problem
in the third dataset; the minima per day were all zero (looks like a healthy person snuck into our study). We can also check for this with an
And if neither of these conditions are true, we can use Let’s test that out:
In this way, we have asked Python to do something different depending on the condition of our data. Here we printed messages in all cases,
but we could also imagine not using the
How do I make a choice option in Python?choice() is an inbuilt function in Python programming language that returns a random item from a list, tuple, or string.. Syntax: random. ... . Note:We have to import random to use choice() method. ... . The output every-time will be different as the system returns a random item. ... . Practical application:. How do you add options in Python?add option in python script. import argparse.. import sys.. parser = argparse. ArgumentParser(description="Does some awesome things."). parser. add_argument('message', type=str, help="pass a message into the script"). if __name__ == '__main__':. args = parser. parse_args(sys. argv[1:]). Can you do multiple choice in Python?Using while true with if statement you can make a multiple-choice question in Python. stop the loop if the user enters “Q”.
How do you create a list in Python?In Python, a list is created by placing elements inside square brackets [] , separated by commas. A list can have any number of items and they may be of different types (integer, float, string, etc.). A list can also have another list as an item.
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