Question

Use python to write a code

Problem 1: Environmental Monitoring

You are given a nested list in which the sublists contain tuples!

Example:

samples = [ [('frog','H'), ('toad','D') ], [('trout','H'), ('salmon','S'), ('catfish','H')] ]

Here each species is either healthy H, dead D or sick S. Access the health status of a specified animal using multi-indexing.

Count how many are healthy using two nested for loops. List will be bigger and different on each version.

Answer 1

Python Code:

""" Python program for Environmental Monitoring """

# Dictionary that holds the health status of animals
samples = [ [('frog','H'), ('toad','D') ], [('trout','H'), ('salmon','S'), ('catfish','H')] ]

# Access the health status of a specified animal using multi-indexing
# Accessing health status of salmon
print("\n Health status of salmon: " + samples[1][1][1])

# Count how many are healthy using two nested for loops
# Variable that holds the count
cnt=0;

# Outer loop to iterate over sub lists
for i in range(len(samples)):
    # Inner for loop for iterating over each tuple in sublist
    for j in range(len(samples[i])):
        # Checking health status
        if samples[i][j][1] == 'H':
            cnt = cnt + 1

# Printing results
print(" As a total %d animals are healthy.. " %(cnt))
      

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Sample Run: