def main():
for row in range (7):
assignment = int(1)
if row == 1:
for assignment_number in range(0,8):
assignment_number+1
for i in range(0,7):
assignment_mark = float(input(("Please enter your mark for assginment" assignment_number,": "))
assignment_weight = float(input("Please enter the total weight percentage for the assignment: "))
main()
So this is my code above,
I'm basically trying to work out how I could say for each input variable "Please enter your mark for assignment x (from 1 up to 7).
Which will loop, so once they enter it for assignment 1, it then asks the same question for assignment 2.
I hope this makes some sense. I'm new to programming in general and this just happens to also be my first post on stack! Be gentle (:
Thanks!
There are a few problems with your code:
assignment_number+1 without assigning it to a variable does nothing, and even if you did, that value would be lost after the loop. If you want to offset the numbers by one, you can just use range(1, 8) or do +1 when you actually need that value of that variable
in your second loop, your loop variable is i, but you are using assignment_number from the previous loop, which still has the value from the last execution, 7
you have to store the values for assignments_mark and assignment_weight somewhere, e.g. in two lists, a list of tuples, or a dict of tuples; since assignment numbers start with 1 and not 0, I'd recommend a dict
You can try something like this, storing the marks and weights for the assignments in a dictionary:
assignments = {}
for i in range(7):
assignment_mark = float(input("Please enter your mark for assginment %d: " % (i+1)))
assignment_weight = float(input("Please enter the total weight percentage for the assignment: "))
assignments[i+1] = (assignment_mark, assignment_weight)
print(assignments)
Let the loop do the counting, then use string formatting.
And you only need a single loop to collect each pair of events
from collections import namedtuple
Assignment = namedtuple("Assignment", "mark weight")
assignments = []
for idx in range(7):
print("Please enter data for assignment {}".format(idx+1))
mark = float(input("mark: "))
weight = float(input("weight:"))
assignments.append(Assignment(mark, weight))
print(assignments)
Related
In this code, I have a user-generated list of numbers and have to find the amount of duplicates a specific element has within that list. I am getting an error in the function. How do I fix this?
def count(list,y):
new_list = []
for j in range(0,x):
if(list[j]==y):
new_list.append(list[j])
else:
pass
print(new_list)
length = len(new_list)
print("The number {} appears {} times in the list".format(y,length))
list = []
x = int(input("Please enter the size of the list you want to create: "))
for i in range(0,x):
value = input("Please enter value of list : ")
list.append(value)
print("The list of the values you entered : {}".format(list))
y = int(input("Which element do you want to find the number? : "))
count(list,y)
There were multiple issues in your code.
In the loop in function count instead j you are using i as index.
initiation of loop index till range(0,x) => x is not defined as the variable is not assigned in this scope, instead use len of the list.
All the inputs added to the list were strings and the one that was searched was an integer.
Other suggestions:
do not use list as a variable name as it is a keyword.
Below this code I am also providing a shorter version of the function count.
def count(mylist,y):
new_mylist = []
for j in range(0,len(mylist)):
print(mylist[j])
if(mylist[j]==y):
new_mylist.append(mylist[i])
else:
pass
length = len(new_mylist)
print("The number {} appears {} times in the mylist".format(y,length))
mylist = []
x = int(input("Please enter the size of the mylist you want to create: "))
for i in range(0,x):
value = int(input("Please enter value of mylist : "))
mylist.append(value)
print("The mylist of the values you entered : {}".format(mylist))
y = int(input("Which element do you want to find the number? : "))
count(mylist,y)
Shorter version
def count(mylist,y):
length = mylist.count(y)
print("The number {} appears {} times in the mylist".format(y,length))
one issue, you're trying to acces the i'th element in list, but i is not initialized. Try replacing i with j
for j in range(0,x):
if(list[i]==y):
new_list.append(list[i])
If you don't mind me taking liberties with your code, here's an example using the Counter from collections. Note that it doesn't do exactly the same thing as your code, as Counter doesn't use indexes as you were using before.
from collections import Counter
input_counter = Counter()
while True:
value = input("Please enter a value (or nothing to finish): ")
if value == '':
break
input_counter[value] += 1
print(input_counter)
y = input("Which number do you want to count the instances of? ")
print(input_counter[y])
I'm trying to ask the user to input how many classes they have (x), ask "What are your grades in those classes?" x amount of times, and record all of the inputted grades to use later.
I tried to assign the question to a variable and ask to print the variable, but I get only the last inputted number. I don't want to print the numbers, I want to store them for later so I can add them together. I was just using the print function to see how my numbers would be stored if assigning the variable actually worked. How would I record all the inputted numbers to later add and calculate GPA?
numofclasses = int(input("How many honors classes do you have?: "))
for i in range(numofclasses):
grades = str(input("Enter the unweighted grade from one class "))
print(grades)
I want to get all the inputted numbers recorded, but by using the print option I only get the last inputted number recorded.
The thing you want to use is a list, which is used to container which holds a sequence of datatypes, like integer, characters, etc,
Think of it this way, if you want to use 3 variables in python what would you generally do
a = 1
b = 2
c = 3
This works fine, but what if the number of variables is 50, or 100, how many variables will you keep defining, hence you would need a container to store these, which is where a list comes in. So we would just do
li = [1,2,3]
And access these variables via indexes, which start from 0
a[0] #1
a[1] #2
a[2] #3
Keeping this in mind, we would do!
numofclasses = int(input("How many honors classes do you have?: "))
#List to save all grades, defined by assigning variable to []
all_grades = []
for i in range(numofclasses):
#Take grades from the user
grades = input("Enter the unweighted grade from one class ")
#Append the grades to the list, using list.append function
all_grades.append(grades)
#Loop through the list to print it
for item in all_grades:
print(item)
#Print all grades in a single line by joining all items of list in a string
s = " ".join(all_grades)
print(s)
And the output will look like
How many honors classes do you have?: 3
Enter the unweighted grade from one class A
Enter the unweighted grade from one class B
Enter the unweighted grade from one class C
#All grades in different lines
A
B
C
#All grades in single line
A B C
It seems to me there are a couple options that may be suitable.
Printing the input each iteration:
numofclasses = int(input("How many honors classes do you have?: "))
for i in range(numofclasses):
grades = str(input("Enter the unweighted grade from one class "))
print(grades) # move print to inside of loop
Storing the values in a list for printing later:
numofclasses = int(input("How many honors classes do you have?: "))
grades = []
for i in range(numofclasses):
grades.append(str(input("Enter the unweighted grade from one class ")))
print(grades) # will look like ["A", "B", "C", "B"]
Here is how yo do it:
class_dict = {}
numOfClasses = input("How many classes do you take? Enter here : ")
for i in range(int(numOfClasses)):
class_dict["class" + str(i +1)] = input("Enter your grade for class " + str(i +1) + ": ")
print(class_dict)
The above should do it.
I am trying to get into coding and this is kinda part of the assignments that i need to do to get into the classes.
"Write a program that always asks the user to enter a number. When the user enters the negative number -1, the program should stop requesting the user to enter a number. The program must then calculate the average of the numbers entered excluding the -1."
The while loop i can do... The calculation is what im stuck on.
negative = "-1"
passable = "0"
while not passable <= negative:
passable = input("Write a number: ")
I just want to get this to work and a explanation if possible
As pointed out by some of the other answers here, you have to sum up all your answers and divide it by how many numbers you have entered.
However, remember that an input() will be a string. Meaning that our while loop has to break when it finds the string '-1' , and you have to add the float() of the number to be able to add the numbers together.
numbers=[]
while True:
ans=input("Number: ")
if ans=="-1":
break
else:
numbers.append(float(ans))
print(sum(numbers)/len(numbers))
I would initialize a list before asking the user for a number, using a do-while. Then, you add every number to that list unless the number == -1. If it does, then you sum every element in the list and output the average.
Here's pseudocode to help:
my_list = []
do
input_nb = input("Please enter a number: ")
if(input_nb != -1)
my_list.add(input_nb)
while (input_nb != -1)
average = sum(my_list) / len(my_list)
print('My average is ' + average)
You are assigning strings to your variables, which I don't think is your intention.
This will work:
next_input = 0
inputs = []
while True:
next_input = int(input('Please enter a number:'))
if next_input == -1:
break
else:
inputs.append(next_input)
return sum(inputs) / len(inputs)
First, you need to create a container to store all the entered values in. That's inputs, a list.
Next, you do need a while loop. This is another way of structuring it: a loop that will run indefinitely and a check within it that compares the current input to -1, and terminates the loop with break if it does. Otherwise, it appends that input to the list of already entered inputs.
After exiting the loop, the average is calculated by taking the sum of all the values in the entered inputs divided by the length of the list containing them (i.e. the number of elements in it).
I am trying to shorten the process of making lists through the use of a defined function where the variable is the list name. When run, the code skips the user input.
When I run my code, the section of user input seems to be completely skipped over and as such it just prints an empty list. I've tried messing around with the variable names and defining things at different points in the code. Am I missing a general rule of Python or is there an obvious error in my code I'm missing?
def list_creation(list_name):
list_name = []
num = 0
while num != "end":
return(list_name)
num = input("Input a number: ")
print("To end, type end as number input")
if num != "end":
list_name.append(num)
list_creation(list_Alpha)
print("This is the first list: " + str(list_Alpha))
list_creation(list_Beta)
print("This is the second list: " + str(list_Beta))
I want the two seperate lists to print out the numbers that the user has input. Currently it just prints out two empty lists.
You need to move the return statement to the end of the function, because return always stops function execution.
Also, what you're trying to do (to my knowledge) is not possible or practical. You can't assign a variable by making it an argument in a function, you instead should remove the parameter list_name altogether since you immediately reassign it anyway, and call it like list_alpha = list_creation()
As a side note, the user probably wants to see the whole "To end, type end as number input" bit before they start giving input.
Dynamically defining your variable names is ill advised. With that being said, the following code should do the trick. The problem consisted of a misplaced return statement and confusion of variable name with the variable itself.
def list_creation(list_name):
g[list_name] = []
num = 0
while num != "end":
num = input("Input a number: ")
print("To end, type end as number input")
if num != "end":
g[list_name].append(num)
g = globals()
list_creation('list_Alpha')
print("This is the first list: " + str(list_Alpha))
list_creation('list_Beta')
print("This is the second list: " + str(list_Beta))
There are a couple of fundamental flaws in your code.
You redefine list_name which is what Alpha and Beta lists are using as the return.(list_name = [] disassociates it with Alpha and Beta so your function becomes useless.)
You return from the function right after starting your while loop(so you will never reach the input)
In your function:
list_Alpha = []
list_Beta = []
def list_creation(list_name):
# list_name = [] <-- is no longer Alpha or Beta, get rid of this!
num = 0
...
The return should go at the end of the while loop in order to reach your input:
while num != "end":
num = input("Input a number: ")
print("To end, type end as number input")
if num != "end":
list_name.append(num)
return(list_name)
def getExamPoints(examPoints):
for examPoints in range(1, 5):
examPoints = input("Please enter students exam scores: ")
totalPoints = input("Please enter total possible points: ")
print("The total exam points are: " + sum(int(examPoints)))
avg = float(int(str(examPoints))/int(totalPoints))
print("the average is: ", avg)
on Line 5 I am getting the error 'int object is not iterable'
and I have no idea why.
I am attempting to write a program with functions and this portion of the function is suppose to take four homework scores each out of eighty points and calculate the average of the scores and then take that average and multiply it by the percentage that homework is worth for the class, but I cant even seem to get this chunk of the program to get an average of homework scores. I am not very good with python, also if this isn't formatted correctly I apologize in advance, but any help would be much appreciated.
examPoints is not a list of inputs in the original code, but just one variable that gets overwritten with each iteration of the user-input loop:
for examPoints in range(1, 5):
examPoints = input("Please enter students exam scores: ")
Instead, you want to keep each input separately.
e.g. by appending it to a list:
examPoints = []
for _ in range(1,5):
# add input to list after converting it to an integer
examPoints.append(int(input("Please enter students exam scores: ")))
...
The input-text-to-integer conversion can be done either as you are appending (return error to user immediately upon input that can't be converted), or when you're performing the sum, by using a list comprehension or the map function:
# sum version
sum([int(v) for v in examPoints])
# map version
sum(map(int, examPoints))
Sorry, but (In my opinion) your code is a bit messy. Instead, try:
def getExamPoints(examPoints):
points = []
for examPoints in range(1, 5):
points = points + [int(input("Please enter students exam scores: "))]
totalPoints = input("Please enter total possible points: ")
print("The total exam points are: " + sum(examPoints))
avg = float(int(str(examPoints))/int(totalPoints))
print("the average is: ", avg)
what sum() looks for is an iterable object, like a list, and adds together everything in it. Since examPoints is defined as an integer, it is not iterable. Instead, make a separate list, and put the input inside there.