Why do I get TypeError: can't multiply sequence by non-int of type 'float'?
Question:
I am typing to get a sale amount (by input) to be multiplied by a defined sales tax (0.08) and then have it print the total amount (sales tax times sale amount).
I run into this error. Anyone know what could be wrong or have any suggestions?
salesAmount = raw_input (["Insert sale amount here n"])
['Insert sale amount here n']20.99
>>> salesTax = 0.08
>>> totalAmount = salesAmount * salesTax
Traceback (most recent call last):
File "<pyshell#57>", line 1, in <module>
totalAmount = salesAmount * salesTax
TypeError: can't multiply sequence by non-int of type 'float'
Answers:
The problem is that salesAmount is being set to a string. If you enter the variable in the python interpreter and hit enter, you’ll see the value entered surrounded by quotes. For example, if you entered 56.95 you’d see:
>>> sales_amount = raw_input("[Insert sale amount]: ")
[Insert sale amount]: 56.95
>>> sales_amount
'56.95'
You’ll want to convert the string into a float before multiplying it by sales tax. I’ll leave that for you to figure out. Good luck!
raw_input
returns a string (a sequence of characters). In Python, multiplying a string and a float makes no defined meaning (while multiplying a string and an integer has a meaning: "AB" * 3
is "ABABAB"
; how much is "L" * 3.14
? Please do not reply "LLL|"
). You need to parse the string to a numerical value.
You might want to try:
salesAmount = float(raw_input("Insert sale amount heren"))
Maybe this will help others in the future – I had the same error while trying to multiple a float and a list of floats. The thing is that everyone here talked about multiplying a float with a string (but here all my element were floats all along) so the problem was actually using the * operator on a list.
For example:
import math
import numpy as np
alpha = 0.2
beta=1-alpha
C = (-math.log(1-beta))/alpha
coff = [0.0,0.01,0.0,0.35,0.98,0.001,0.0]
coff *= C
The error:
coff *= C
TypeError: can't multiply sequence by non-int of type 'float'
The solution – convert the list to numpy array:
coff = np.asarray(coff) * C
You can’t multiply string and float.instead of you try as below.it works fine
totalAmount = salesAmount * float(salesTax)
I am typing to get a sale amount (by input) to be multiplied by a defined sales tax (0.08) and then have it print the total amount (sales tax times sale amount).
I run into this error. Anyone know what could be wrong or have any suggestions?
salesAmount = raw_input (["Insert sale amount here n"])
['Insert sale amount here n']20.99
>>> salesTax = 0.08
>>> totalAmount = salesAmount * salesTax
Traceback (most recent call last):
File "<pyshell#57>", line 1, in <module>
totalAmount = salesAmount * salesTax
TypeError: can't multiply sequence by non-int of type 'float'
The problem is that salesAmount is being set to a string. If you enter the variable in the python interpreter and hit enter, you’ll see the value entered surrounded by quotes. For example, if you entered 56.95 you’d see:
>>> sales_amount = raw_input("[Insert sale amount]: ")
[Insert sale amount]: 56.95
>>> sales_amount
'56.95'
You’ll want to convert the string into a float before multiplying it by sales tax. I’ll leave that for you to figure out. Good luck!
raw_input
returns a string (a sequence of characters). In Python, multiplying a string and a float makes no defined meaning (while multiplying a string and an integer has a meaning: "AB" * 3
is "ABABAB"
; how much is "L" * 3.14
? Please do not reply "LLL|"
). You need to parse the string to a numerical value.
You might want to try:
salesAmount = float(raw_input("Insert sale amount heren"))
Maybe this will help others in the future – I had the same error while trying to multiple a float and a list of floats. The thing is that everyone here talked about multiplying a float with a string (but here all my element were floats all along) so the problem was actually using the * operator on a list.
For example:
import math
import numpy as np
alpha = 0.2
beta=1-alpha
C = (-math.log(1-beta))/alpha
coff = [0.0,0.01,0.0,0.35,0.98,0.001,0.0]
coff *= C
The error:
coff *= C
TypeError: can't multiply sequence by non-int of type 'float'
The solution – convert the list to numpy array:
coff = np.asarray(coff) * C
You can’t multiply string and float.instead of you try as below.it works fine
totalAmount = salesAmount * float(salesTax)