Python - TypeError int object is not iterable

Question

Here s my code   import math  print  Hey  lets solve Task 4      number1   input   How many digits do you want to look at     number2   input   What would you like the digits to add up to      if number1    1      cow   range 0 10  elif number1    2      cow   range 10 100  elif number1    3      cow   range 100 1000  elif number1    4      cow   range 1000 10000  elif number1    5      cow   range 10000 100000  elif number1    6      cow   range 100000 1000000  elif number1    7      cow   range 1000000 10000000  elif number1    8      cow   range 10000000 100000000  elif number1    9      cow   range 100000000 1000000000  elif number1    10      cow   range 1000000000 10000000000   number3   cow -1    1  n   0 while n  lt  number3      number4   list cow n       n    1   I am looking to make a loop so that for each element in the list  it will get broken down into each of it s characters  For example  say the number 137 was in the list then it would be turned into  1 3 7   Then I want to add these numbers together  I haven t started that bit yet but I have some idea of how to do it    However  I keep getting the error message  TypeError   int  object is not iterable   when I try and run this   What am I doing wrong

User · Answer

If the case is  n int input    Instead of - gt  for i in n  - gt  gives error-  int  object is not iterable Use - gt  for i in range 0 n   - gt  works fine

User · Answer

Your problem is with this line   number4   list cow n     It tries to take cow n   which returns an integer  and make it a list   This doesn t work  as demonstrated below    gt  gt  gt  a   1  gt  gt  gt  list a  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError   int  object is not iterable  gt  gt  gt    Perhaps you meant to put cow n  inside a list   number4    cow n     See a demonstration below    gt  gt  gt  a   1  gt  gt  gt   a   1   gt  gt  gt      Also  I wanted to address two things    Your while-statement is missing a   at the end  It is considered very dangerous to use input like that  since it evaluates its input as real Python code   It would be better here to use raw input and then convert the input to an integer with int      To split up the digits and then add them like you want  I would first make the number a string   Then  since strings are iterable  you can use sum    gt  gt  gt  a   137  gt  gt  gt  a   str a   gt  gt  gt    This way is more common and preferred  gt  gt  gt  sum int x  for x in a  11  gt  gt  gt    But this also works  gt  gt  gt  sum map int  a   11  gt  gt  gt

User · Answer

This is very simple you are trying to convert an integer to a list object     of course it will fail and it should      To demonstrate prove this to you by using the example you provided    just use type function for each case as below and the results will speak for itself     gt  gt  gt  type cow   lt class  range  gt   gt  gt  gt    gt  gt  gt  type cow 0    lt class  int  gt   gt  gt  gt    gt  gt  gt  type 0   lt class  int  gt   gt  gt  gt    gt  gt  gt   gt  gt  gt  list 0  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError   int  object is not iterable  gt  gt  gt

[python] Python - TypeError: 'int' object is not iterable

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