For the create_spend_chart section can we please get a more explicit description of the calculation we are supposed to perform?
I am currently doing a percentage calculation like this:
(single category amount spent) / (total spent across all categories)
I am trying to interpret the Console output and I think its telling me my 'o’s are in the wrong place, which would mean I’m doing the calculation wrong, but since we can’t see the test data it’s hard to debug.
Your code so far
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Challenge Information:
Build a Budget App Project - Build a Budget App Project
I did a final look over my code before copying and found a big error - I had mismatched the labels with the bars. That is fixed now, but I still get the error ‘Expected different chart representation. Check that all spacing is exact.’
Updated code below.
class Category:
def __init__(self, category):
self.category = category
self.balance = 0
self.ledger = []
def check_funds(self, amount):
if self.balance-amount >= 0:
return True
else:
return False
def get_balance(self):
return self.balance
def deposit(self, amount, description=""):
self.ledger.append({"amount": amount, "description": description})
self.balance += amount
#print("Ledger: ",self.ledger)
#print("Total Funds Available", self.balance)
def withdraw(self, amount, description=""):
if self.check_funds(amount):
#used abs() in case user inputs a withdrawl as neg, will still work
self.ledger.append({"amount": -abs(amount), "description": description})
self.balance += -abs(amount)
return True
else:
return False
print("Ledger: ",self.ledger)
print("Total Funds Available", self.balance)
print(self.balance)
def transfer(self, amount, target):
if self.check_funds(amount):
self.ledger.append
self.withdraw(amount, f"Transfer to {target.category}")
target.deposit(amount, f"Transfer from {self.category}")
return True
else:
return False
#This defines how instance of this class, aka a budget category, print()s
def __str__(self):
string = ''
head = self.category.center(30,"*")
string += head
string += "\n"
total = ""
for line in self.ledger:
amt = (line['amount'])
descr = line['description']
string += f'{descr[0:23]:23}{amt:7.2f}' +"\n" #this f inside the f-string is fixed-point number format. --> 7.2f format a float, reserving 7 spaces, 2 after the decimal point, right justfied by default.
total = self.balance
string += "Total: " + str(total)
return string
def create_spend_chart(categories):
m = [str(cat.category) for cat in categories] #wrote code in another module then copied here. keeping m
maxlen = len(max(m, key=len))
for i in range(len(m)):
m[i] += " "*maxlen
transp = [[m[j][i] for j in range(len(m))] for i in range(maxlen)]
#print("\n")
for row in transp:
row.insert(0," ")
row.insert(2," ") #could make this into a loop. currently brute force. only works if <=4 categories
row.insert(4," ")
row.insert(6," ")
chart = [None] * (maxlen + 12)
chart[0] = "Percentage spent by category" #chart title
chart[1] = "100|" + maxlen*" "
for i in range (2,11):
chart[i] = " "+str(110-10*i) + "|"
chart[11] = " 0|"
chart[12] = " "+"---"*len(categories) + "-"
transplist = [''.join(ele) for ele in transp]
#adding the 'o' for percentage
totspent=0
for cat in categories:
j=0
totdep=0
spent=0
for item in cat.ledger: #calc total spent
if ('Transfer' not in item["description"]) and (item["amount"]<0):
spent += abs(item["amount"])
for item in cat.ledger:
if ('Transfer' not in item["description"]) and (item["amount"]>0):
totdep += item["amount"]
totspent+=spent
cat.spent = spent
print(cat.category, "spent: ",cat.spent)
totspent+=spent
print("totspent: ", totspent)
for cat in categories:
cat.percent=cat.spent/totspent
for cat in categories:
print(cat.category,' ',cat.percent)
for i in range(11):
row=11-i
for cat in categories:
if (cat.percent*10)>=(i):
chart[row]+=' o '
else:
chart[row]+=" "
chart[13:] = transplist
#for line in chart:
# print(line)
for i in range(0,12):
chart[i] += " " * (len(chart[11]) - len(chart[i])+1)
print("length 100 line: ", len(chart[11]))
print('\n'.join(chart))
return '\n'.join(chart)
An assertion error gives you a lot of information to track down a problem. For example:
AssertionError: 'Year' != 'Years'
- Year
+ Years
? +
Your output comes first, and the output that the test expects is second.
AssertionError: ‘Year’ != ‘Years’
Your output: Year does not equal what’s expected: Years
The next part is a diff, it shows the difference between two files
- Year
+ Years
? +
- Dash indicates the incorrect output + Plus shows what it should be ? The Question mark line indicates the place of the character that’s different between the two lines. Here a + is placed under the missing s .
Thank you. It’s very helpful to get how to read the console output.
Your test input was helpful too - I realized I hadn’t tested a case where the spending was nearly 100% in a category.
I have fixed that, but still get an assertion error. My number of characters now matches though, so my guess is some characters are in the wrong place.
'Perc[77 chars]| \n 60| \n 50| o \n [297 chars] t ’ !=
'Perc[77 chars]| o \n 60| o \n 50| o \n [297 chars] t ’
Based on the console output of the chart representation:
my interpretation is that the middle column is actually a higher spending percentage than what my code calculates, and there should be more o’s there.
What does the ^ symbol mean in this case?
I’m having a hard time debugging when I’m not sure what the input data is, since my chart representation is correct now based on the various input tests I have tried.
Thank you! Since the example above used a + to show the difference I thought ^ might mean something else.
I have found my error. I was almost doing the calculation correctly, but had a line which added the total spent for the last category twice. Fixed and passed.
In case it helps anyone else:
I did a lot more tests, and eventually found my error by creating three spending categories then making the spending 0%, and then 100% in each category one by one.
