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Python

Posted by Simran Bansari
Simran Bansari
4,517 Points

What does this error mean and how do I fix it?

print (reverse(string))
^
SyntaxError: invalid syntax

5 Answers

Alexander Davison
Alexander Davison
65,454 Points

You're probably missing a closing parentheses or a symbol in the previous lines of code.

Can you show all your code, since the error is probably happening in above lines of code?

Thank you. ~Alex

Simran Bansari
Simran Bansari
4,517 Points

//This is my code now but I am still getting the syntax error pointing to print??//

def reverse(str): return str[::-1]

string = str(raw_input("Put a phrase you want reversed!!")

print reverse(string)

Alexander Davison
Alexander Davison
65,454 Points

You are missing a ) for the str function.

It's this line of code:

string = str(raw_input("Put a phrase you want reversed!!")

You need to add another parentheses at the end and you should be good to go. The first parentheses at the end is to close the opening parentheses of the raw_input function and the one that is used to close the str function is missing :smile:

Add that and you should be good to go.

string = str(raw_input("Put a phrase you want reversed!!"))

As you see I added an extra parentheses at the end of the line.

Alexander Davison
Alexander Davison
65,454 Points

Just note: If this post helps you, can you please provide either of us (Torsten or I) with a Best Answer? It helps a ton with the Treehouse Community filters. :smile:

Thank you for cleaning up the Community filters :)

Torsten Lundahl
Torsten Lundahl
2,570 Points
Torsten Lundahl
Torsten Lundahl
2,570 Points

There is no reverse function for strings in the python library. If you want to print a string in reverse, you'll be better off slicing the string.

print(string[::-1])

This will print the string in backwards.

If the code is part of a challange it would be nice if you could link the question to it. It makes it easier to elaborate on the problem.

Alexander Davison
Alexander Davison
65,454 Points

You are correct, but this specific error isn't caused by that (once you fix the SyntaxError then it will display an error about this)

Simran Bansari
Simran Bansari
4,517 Points
Simran Bansari
Simran Bansari
4,517 Points

There is still a syntax error pointing to print, Alexander Davison, Is they're anything else wrong?

Simran Bansari
Simran Bansari
4,517 Points
Simran Bansari
Simran Bansari
4,517 Points

//This is the output that I now get when I enter a word// Put a phrase that you want reversed!! hello
hello
Traceback (most recent call last):
File "reverse.py", line 3, in <module>
print (string)[::-1]
TypeError: 'NoneType' object is not subscriptable

Simran Bansari
Simran Bansari
4,517 Points
Simran Bansari
Simran Bansari
4,517 Points

//This is my newer code now //

def reverse(str): return str[::-1]

string = str(input("Put a phrase you want reversed!!"))

print (string)[1::-1]

Alexander Davison
Alexander Davison
65,454 Points

You need to put the [1::-1] inside the print statement next to the string variable.

print(string[1::-1])

I hope you understand now :smile:

~Alex