Activity 05: Control structures

Solve the following problems.

See https://asu-compmethodsphysics-phy494.github.io/ASU-PHY494/2021/02/02/04_Python_2/ for help.

Processing data in a loop: batch temperature conversion

In temperatures.py you are given the list

temperatures = [60.1, 78.3, 98.8, 97.1, 101.3, 110.0]

The conversion from a temperature θ in Fahrenheit to T in Kelvin is

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  T = - (θ - 32) + 273.15
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1. Edit temperatures.py so that each temperature in Fahrenheit in the list is converted to Kelvin and stored in a new list temp_Kelvin.

2. Add code to temperature.py to print a table of the temperature in F and in K side by side by iterating through the lists temperatures and temp_Kelvin simultaneously.

   Hints:

   • You can use len() and range()

   • Assign individual values to variables T_K and theta_F and print each line with the format print("{0:6.1f} F {1:6.1f} K".format(theta_F, T_K)).

Generate values from -10 to 10 in steps of 0.25

We often need a range of values at arbitrary step size, e.g., for plotting a function on a grid. The range() function only provides integer numbers. Find a way to generate a list of numbers from start=-10 to stop=10 (exclusive) with step=0.25, i.e., [-10., -9.75, -9.5, ..., 9.5, 9.75].

Put your code into file grid.py and store your list in the variable x_grid.

Hints:

• You can use a list comprehension for improved readability or an explicit loop with appending to a list.

• Think about how to use range() and how to use the resulting integers i to generate the floating point numbers: x = i * step + start

Reading input

Write a program alternatesum.py that

1. reads numbers from input until an empty line is encountered
2. stores the numbers in a list numbers
3. calculates the "alternating sum" numbers[0] - numbers[1] + numbers[2] - numbers[3] + ... and stores it in a variable asum. (You can also print asum.)

Guessing game

Write a program guessinggame.py that takes a single number guess as input and compares it to a preset integer number secret_number. Tell the player if their guess was "too low", "too high", or that they "guessed the number".