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programming assignment - mario - Dec-16-2017
You are going to write a program that reads data from a file into a list and allows the user to query and modify the data. You may assume that the file is formatted properly for this assignment.
Design specifications: The program must use lists. For full credit, the program should read all data from one file (see Appendix A). For slightly less credit (-5), the program could read all data from four files (one for names, one for continents, one for populations, and one for areas) (see Appendix B). For less credit than that (-10), the program can hard-code in the three lists of data (see Appendix C). (Start with hard-coded lists, get the program working, and then work on reading in the lists from files.) For each menu option, there should be a function that takes the lists as parameters. There should be no global variables.
RE: programming assignment - Mekire - Dec-16-2017
Sounds like fun. Hope you get an A.
RE: programming assignment - DeaD_EyE - Dec-16-2017
Reading data from four files line by line sounds cool. This remind me to look into contextlib.
Example without modification of data:
import contextlib
import sys
def read_files_iterative(filenames):
with contextlib.ExitStack() as stack:
try:
files = [stack.enter_context(open(fname)) for fname in filenames]
except (FileNotFoundError, PermissionError) as e:
print(e, file=sys.stderr)
raise
for data in zip(*files):
yield data
def main():
if len(sys.argv) != 5:
print('4 Filenames are required')
return 1
filenames = sys.argv[1:5]
try:
for row in read_files_iterative(filenames):
print(row)
except:
return 2
# putting them into a list:
# content = list(read_files_iterative(filenames))
# print(content)
return 0
if __name__ == '__main__':
# be a nice shell citizen and return an error code
sys.exit(main())Conclusion: This code won't help you and it does not fit to your professors requirements.