#exception handling example
# Read the file record by record
# and calculate the total number of birds observed

fileReadError = False
birdFile = open("birdFile", "r")
totalBirdsSeen=0
while fileReadError == False:
    try:
        birdRec = birdFile.readline()
    except:
        print("Attempt to read beyond end of file")
        print ("Number of records in file = ", n-1)
        fileReadError = True
        print ("FileReadError ",fileReadError)
    else:           
        field = birdRec.split(",")
        try:
            birdsSeen = int(field[1])
        except:
            birdsSeen = 0
            print ("Read beyond end of file")         
            fileReadError = True
            print ("FileReadError ",fileReadError)
        else:
            totalBirdsSeen = totalBirdsSeen + birdsSeen
            print("Birds seen ",birdsSeen)
print("Total birds seen ", totalBirdsSeen)

try:
     birdFile = open("nonexistentfile","r")
except:
    print("Sorry, can't find this file")

#Test user input errors
print("testing for bad data input")
badInteger = input("enter integer: ")

try:
    goodint = int(badInteger)
except:
    print("that is not an integer")
else:
    print ("You entered ", goodint)