Question

^{I've updated this as much as I can think of. This is a PYTHON problem that is due today. Please help. I'm trying to read names from a file that begin with @ and print them to another file. It will also read multiple lines of sales amounts for each name and write them and then total them with the end being ***END*** at the bottom of each person's figures and total. I am supposed to write a try and except to insert as well if the numbers aren't actual numbers. Trying to make it a float or produce an error message.}

<sup>def main():
PRE = '@'
SEP = '***END***\n'

inputFile = open(\r'C:\Users\Trey\Desktop\Programming\good.txt', 'r')
outputFile = open(\r'C:\Users\Trey\Desktop\Programming\goodTrey.txt', 'w')
  
for line in inputFile:
amount = 0
if inputFile.startswith(PRE):
outputfile.write(' ',line)
elif:
amount = float(line)
outputfile.write('$'{:,.2f}.format(amount),'\n')
else:
inputFile.startswith(SEP):
total += amount
outputfile.write('$'{:,.2f}.format(total),'\n', '***END***\n')
# close the files
inputFile.close()
outputFile.close()
  
#call the main function   
main()</sup>

Answer 1

The following errors can be found in the given program:

• eilf expects a condition, there is none given.
• there are few string formating errors in outputFile.write() calls.
• it is a good practice to get the list of lines from inputFile using readlines() method.
• there are few typos.

possible fixes:

• change the loop to : for line in inputFile.readlines()
• format the string arguments in outputFile.write() . strings are concatenated with + operator not , operator.
• switch the else and elif part and add a condition to elif to check for SEP
• add try except block while reading floats.
• fix the typos

program:

def main():
PRE = '@'
SEP = '***END***\n'

inputFile = open(r'C:/Users/Trey/Desktop/Programming/good.txt', 'r' 'r')
outputFile = open(r'C:/Users/Trey/Desktop/Programming/goodTrey.txt', 'w')
total = 0
for line in inputFile.readlines():
amount = 0
if line[0]==PRE:
outputFile.write(line)
elif line == SEP:
outputFile.write('${:,.2f}'.format(total)+'\n***END***\n')
total = 0
else:
try:
amount = float(line)
total += amount
outputFile.write('${:,.2f}'.format(amount)+'\n')
except:
print("Invalid entry at", line)
# close the files
inputFile.close()
outputFile.close()
  
#call the main function   
main()

sample intput and output:

• we used the following file in this program:

@person1
235.23
23.44
2345.23
***END***

• we got the following output file