How to compare a int variable with a function that returns a int

Question

I’m trying to make code( that I stole) output the Fibonacci sequence and I’m having trouble letting the function Terms be able to compare to an variable. I know this is messy code but I like 3 days into python so I don’t know what to do.

# first two terms
n1, n2 = 0, 1
count = 0


# Asks amount of terms to be generated 
def Terms():
   while True:
        nterms = (input("How many terms? "))
        if nterms.isdigit():
            nterms= int(nterms)
            if nterms > 0:
               break
            else:
               print("0")
        else:
            print("Please choose an number that is able to be used")
   return nterms
Terms()
# Calls Terms then generates
print(int(Terms))
def Fibonacci():
   # first two terms
   n1, n2 = 0, 1
   count = 0
   Terms()
   print("Fibonacci sequence:")
   while count < Terms: #Problem right here TypeError: int() argument must be a string, a bytes-like object or a real number, not 'function'
      print(n1)
      nth = n1 + n2
     # update values
      n1 = n2
      n2 = nth
      count += 1
Fibonacci()

I tried making terms an int but it still doesn’t work

Asked By: MapleTofu

||

Source

Answer 1

The fix is probably

while count < Terms():

The error message tells you explicitly that you may not compare to a function (but to a function result). (But after this fix, you will run into another problem…)

An alternative implementation:

# Query the number of terms
while True:
    try:
        n = int(input("How many terms [integer > 1] ? "))
        if n > 1:
            break
    except:
        pass
    print("Invalid input, try again")

# Output the desired number of terms
f0, f1= 0, 1
for i in range(n):
    print("F"+str(i)+" =", f0)
    f0, f1= f1, f0+f1

Answered By: Yves Daoust

Answer 2

There were a few small things. So you called the different functions from a few places. So I removed a few calls and put returnvalue from Terms() in variable terms, and then it worked.

# first two terms
n1, n2 = 0, 1
count = 0


# Asks amount of terms to be generated 
def Terms():
   while True:
        nterms = (input("How many terms? "))
        if nterms.isdigit():
            nterms= int(nterms)
            if nterms > 0:
               break
            else:
               print("0")
        else:
            print("Please choose an number that is able to be used")
   return nterms

# Calls Terms then generates
def Fibonacci():
   # first two terms
   n1, n2 = 0, 1
   count = 0
   terms = Terms() # This is the new variable
   print("Fibonacci sequence:")
   while count < terms: # And using the variable here
      print(n1)
      nth = n1 + n2
     # update values
      n1 = n2
      n2 = nth
      count += 1
Fibonacci()

Answered By: Leo

How to compare a int variable with a function that returns a int

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