Question

PYTHON

population_file = open('populations.txt')
# 1. Define a variable called total_population, assign 0 to this variable

for line in population_file.readlines():
# 2. Add line to the total_population, convert line to an int first

# 3. Close the population_file using the close() method

total_population_file = open('total_population.txt', 'w')
# 4. Use the write() method to write the total_population to the total_population_file. Convert total_population to a string

# 5. Close the total_population_file using the close() method

Require

1.Program creates a new file called total_population.txt

2.The file total_population.txt contains a single line representing the sum of all populations from the populations.txt file

Below is populations.txt file

49177
56540
80429
91923
53752
390113
49631
133570
192294
50789

Answer 1

The program is given below: that open populations.txt file, read populations from file convert line to int, add into total_population and write total_population to total_population.txt file.

#open populations file
population_file = open('populations.txt')

# 1. variable called total_population, assign 0 to this variable
total_population=0

for line in population_file.readlines():
# 2. add line to the total_population, convert line to an int first
total_population = total_population + int(line)
  
# 3. Close the population_file using the close() method
population_file.close()

total_population_file = open('total_population.txt', 'w')
# 4. Use the write() method to write the total_population to the total_population_file.
#Convert total_population to a string
total_population_file.write(str(total_population))

# 5. Close the total_population_file using the close() method
total_population_file.close()

The screenshot of code is given below:

populations.txt

49177
56540
80429
91923
53752
390113
49631
133570
192294
50789

(after execution of program ) total_population.txt

1148218