def outputTable(title, header1, header2, strList, intList):
    """
        Function that prints the contents in tabular format
    """

    # Printing title
    print("\n\n %33s \n" %(title));

    # Printing header
    print("\n %-20s %-10s %-23s \n" %(header1, "|", header2));

    print("\n -------------------------------------------- \n");

    # Printing formatted output
    for i in range(0, len(strList)):
        print("\n %-20s %-10s %-23d " %(strList[i], "|", intList[i]));

    print("\n");


def outputHistogram(strList, intList):


    """
        Function that prints the contents in tabular format
    """

    print("\n\n");

    # Printing names
    for i in range(0, len(strList)):
        print("\n %20s %-5s " %(strList[i], " "), end = "");

        # Printing *'s
        for j in range(0, intList[i]):
            print("*", end="");

    print("\n");


def chkCommas(dataPoint):
    """
        Function that validates commas error checking
    """

    # Checking for non-existence of comma
    if ',' not in dataPoint:
        print('\n Error: No comma in string. \n');
        return False;

    # Checking for more than comma
    elif dataPoint.count(",") > 1:
        print('\n Error: Too many commas in input. \n');
        return False;

    # Checking for integer after comma
    else:

        # Fetching integer after comma
        index = dataPoint.find(",");
        name = dataPoint.split(",")[0];
        integer = (dataPoint.split(",")[1]).strip();

        # Validating integer
        if not (integer.isdigit()):
            print('\n Error: Comma not followed by an integer. \n');
            return False;
        else:
            return True;
def main():
    """
        Main function
    """

    # List's to hold data
    strList = [];
    intList = [];

    # Reading title from user
    title = input('\n Enter a title for the data: ');
    print("\n You entered: " + title);

    # Reading header1 from user
    header1 = input('\n\n Enter the column 1 header: ');
    print("\n You entered: " + header1);

    # Reading header2 from user
    header2 = input('\n Enter the column 2 header: ');
    print("\n You entered: " + header2);

    # Reading dataPoints
    dataPoint = input("\n\n Enter a data point (-1 to stop input): ");

    # Reading data points
    while dataPoint != "-1":
        # Validating commas
        commas = chkCommas(dataPoint);

        # If there commas are OK
        if commas:
            # Splitting data point to name and integer
            name = dataPoint.split(",")[0];
            integer = int((dataPoint.split(",")[1]).strip());

            # Printing to console
            print("\n Data string: " + name);
            print("\n Data integer: " + str(integer));

            # Storing in list
            strList.append(name);
            intList.append(integer);

        # Reading dataPoints
        dataPoint = input("\n\n Enter a data point (-1 to stop input): ");

    # Printing result in tabular format
    outputTable(title, header1, header2, strList, intList);

    # Printing result in histogram
    outputHistogram(strList, intList);

# Calling main function
main();