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  gt  gt  gt  salesTax   0 08  gt  gt  gt  totalAmount   salesAmount   salesTax  Traceback  most recent call last     File   lt pyshell 57 gt    line 1  in  lt module gt      totalAmount   salesAmount   salesTax TypeError  can t multiply sequence by non-int of type  float

User · Answer

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

User · Answer

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

User · Answer

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 here n

User · Answer

You can t multiply string and float instead of you try as below it works fine  totalAmount   salesAmount   float salesTax

User · Answer

You can t multiply string and float instead of you try as below it works fine  totalAmount   salesAmount   float salesTax

User · Answer

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    gt  gt  gt  sales amount   raw input   Insert sale amount       Insert sale amount   56 95  gt  gt  gt  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

User · Answer

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 here n

User · Answer

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 here n

User · Answer

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    gt  gt  gt  sales amount   raw input   Insert sale amount       Insert sale amount   56 95  gt  gt  gt  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

User · Answer

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    gt  gt  gt  sales amount   raw input   Insert sale amount       Insert sale amount   56 95  gt  gt  gt  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

User · Answer

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 here n

User · Answer

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    gt  gt  gt  sales amount   raw input   Insert sale amount       Insert sale amount   56 95  gt  gt  gt  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

[python] Why do I get TypeError: can't multiply sequence by non-int of type 'float'?

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