Question

(previous program) Prompt the user for the filename. Create a new file object sensehat_data_file which opens the file in write mode. Write a loop which will read in 20 values for temperature and humidity from the SenseHat. Sleep 0.5 seconds between each reading taken from the SenseHat Write out the temperature and humidity to the file sensehat_data_file, separated by a comma. Close the file.)

ONLY ANWSER problem below

Then Open the file in read only mode. Use a loop to read in the data from the file until all lines have been read. Print out the count for the number of the line read in. Print out the temperature and humidity.

Print in Python .

Answer 1

• Since you need a solution for opening the files and printing the data from, we will write a program for that only.
• For the reader's convinience, we will write a function for this task. The function will take the take the filename as argument and it can be used anywhere the programmer needs.

Program plan:

• Open the file in read mode.
• create an empty list data
• initialize count to 0
• Loop until break statement encountered:
  • read a line from file and it in a variable named line
  • if line is null, break
  • slice off the last character from line, since it is a newline character
  • split the line across commas
  • append line to data
  • increment count
• print count
• print the data

Program:

def printFromFile(filename):
f = open(filename, "r")
count = 0
data = []
while True:
line = f.readline()
if not line:
break
line = line[:-1].split(",")
data.append(line)
count+=1

print("Number of lines read: ", count)
for x in data:
print(f"temperature: {x[0]}, humidity: {x[1]}")

Sample output:

• We used a sample text file with three sets of data to test this function. We get the following output:

If you need any more information, please reach out to me in comments