Python Build a Budget App - create_spend_chart function

Python
1

Hi there,

I’ve nearly completed the Python Budget app certification problem, but I’m still struggling to pass the last test, related to the create_spend_chart function, and for the life of me I can’t figure out what I’m doing wrong. I’ve checked the formatting against another example on the forum and it seems to match character by character. I was also first confused about how to compute the percentage spent (the description is super vague about this), but several existing posts seem to confirm what I implemented. So I must be missing something, probably something banal, but someone please help me because I’m slowly going crazy.

Here’s the relevant part of mycode:

def get_total_expenditure(category):
    expenditure = 0
    for item in category.ledger:
        if item['amount'] < 0:
            expenditure += abs(item['amount'])
    return expenditure



def create_spend_chart(categories):
    # Initialize result
    spend_chart = ''

    # Compute spending in each category
    spending = [get_total_expenditure(category) for category in categories]
    total = sum(spending)
    bar_height = [int((amount/total*100) / 10)  for amount in spending]

    # Determine some chart parameters
    cat_width = 3
    title = 'Percentage spent by category'
    total_width = max(len(title),cat_width*len(categories) + 4)

    # Print title
    spend_chart += title + '\n'

    # Print the bar part
    for i in range(100,-1,-10):
        spend_chart += str(i).rjust(3) + '|'
        for j in bar_height:
            if i <= j*10:
                spend_chart += ' o '
            else:
                spend_chart += '   '
        spend_chart += ' \n'

    # Print the separation line
    spend_chart += '    ' + '-'*(cat_width*len(categories) + 1) + '\n'

    # Print the categories
    max_name_length = max([len(cat.name) for cat in categories])
    expanded_cat_names = [cat.name.ljust(max_name_length) for cat in categories]

    for i in range(max_name_length):
        spend_chart += '    ' 
        for j in range(len(categories)):
            spend_chart += ' ' + expanded_cat_names[j][i] + ' '
        if i < max_name_length - 1:
            spend_chart += ' \n'

    # Return result
    return spend_chart.strip()

If someone could help me figure out what I’m missing I would be so grateful!

2

Actually I’ve figured it out the problem already. The solution in the end required, for some reason, a final two spaces, i.e. ' '.

3

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