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I'm learning python and working on exercises. One of them is to code a voting system to select the best player between 23 players of the match using lists.
I'm using Python3.
My code:
players= [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0] vote = 0 cont = 0 while(vote >= 0 and vote <23): vote = input('Enter the name of the player you wish to vote for') if (0 < vote <=24): players[vote +1] += 1;cont +=1 else: print('Invalid vote, try again') I get
TypeError: '<=' not supported between instances of 'str' and 'int'
But I don't have any strings here, all variables are integers.
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To solve the error, you have to figure out where the None value comes from and correct the assignment or conditionally check if the variable doesn't store None . The most common sources of None values are: Having a function that doesn't return anything (returns None implicitly). Explicitly setting a variable to None .
The Python "TypeError: '>' not supported between instances of 'method' and 'int'" occurs when we use a comparison operator between a method and an integer. To solve the error, make sure to call the method with parenthesis, e.g. my_method() . Here is an example of how the error occurs. Copied!
The Python "TypeError: can only concatenate str (not "list") to str" occurs when we try to concatenate a string and a list. To solve the error, access the list at a specific index to concatenate two strings, or use the append() method to add an item to the list.
Change
vote = input('Enter the name of the player you wish to vote for') to
vote = int(input('Enter the name of the player you wish to vote for')) You are getting the input from the console as a string, so you must cast that input string to an int object in order to do numerical operations.
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If you're using Python3.x input will return a string,so you should use int method to convert string to integer.
Python3 Input
If the prompt argument is present, it is written to standard output without a trailing newline. The function then reads a line from input, converts it to a string (stripping a trailing newline), and returns that. When EOF is read, EOFError is raised.
By the way,it's a good way to use try catch if you want to convert string to int:
try: i = int(s) except ValueError as err: pass Hope this helps.
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