How to test a string in Python?

Question

I am new in python and I have this code:

s = 'azcbobobegghakl'
for (i, item) in enumerate(s):    
    print item

for (i, item) in enumerate(s):
    if item=="a" or item=="e" or item=="i" or item=="o" or item=="u" 
    vol++
    print vol

The first for works goods and show each character as should be. For the second for I have this error :

if item=="a" or item=="e" or item=="i" or item=="o" or item=="u"
                                                                     ^
SyntaxError: invalid syntax

I search this post but it not solved Pythonic String Testing

You could really simplify your code with in: if item in 'aeiouAEIOU': — user2555451
– user2555451, Commented Jan 16, 2015 at 3:26

Håken Lid · Accepted Answer · 2015-01-16 03:41:30Z

3

Why do you enumerate when you never use the value i anyway?

s = 'azcbobobegghakl'
for letter in s:    
    print letter

The other loop was missing a colon and indentation.

vol = 0
for letter in s:
    if letter in 'aeiou': 
       vol += 1
print vol

You can also do it like this:

print sum(letter in 'aeiou' for letter in s)

answered Jan 16, 2015 at 3:41

Håken Lid

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4 Comments

Håken Lid Over a year ago

The last one might be a bit confusing, since the keyword in are used in two different ways.

IgorAlves Over a year ago

I am a PHP developer. I am starting to study python. It is why it is a basic question. By the way, your code is good. It prints 5 but show a error. %run "C:/Users/Rayn/PYTHON DOCS/6.00.1X/pset0Test.py". any idea?

IgorAlves Over a year ago

%run "C:/Users/Rayn/PYTHON DOCS/6.00.1X/pset0Test.py"

Håken Lid Over a year ago

That's not a python error message. It's a filepath.

Dashing Adam Hughes · Accepted Answer · 2015-01-16 03:27:12Z

2

You need the colon at the end

if item=="a" or item=="e" or item=="i" or item=="o" or item=="u":

Here's a more compact solution:

if item in ['aeiou']:

answered Jan 16, 2015 at 3:27

Dashing Adam Hughes

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1 Comment

Guillermo Over a year ago

Your condition in the if statement is wrong. It should be if item in 'aeiou'. Otherwise the condition is only true when item is the string aeiou.

Ganesh Kamath - 'Code Frenzy' · Accepted Answer · 2015-01-16 03:33:09Z

1

missing colon:

for (i, item) in enumerate(s):
    if item=="a" or item=="e" or item=="i" or item=="o" or item=="u":
        vol+=1
        print vol

This should work.

Edited: I forgot to mention that Python does not have a ++ operator.

edited Jan 16, 2015 at 3:33

answered Jan 16, 2015 at 3:27

Ganesh Kamath - 'Code Frenzy'

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2 Comments

IgorAlves Over a year ago

I still have an error vol++ ^SyntaxError: invalid syntax

Håken Lid Over a year ago

++ syntax is not used in python. Use +=1 instead.

Guillermo · Accepted Answer · 2015-01-16 03:34:02Z

1

You forgot the : after the if statement. You also have to indent the lines with vol++ and print vol. Furthermore incrementing in python is done by +=1, not by ++.

for (i, item) in enumerate(s):
    if item=="a" or item=="e" or item=="i" or item=="o" or item=="u":
        vol+=1
        print vol

edited Jan 16, 2015 at 3:34

answered Jan 16, 2015 at 3:27

Guillermo

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1 Comment

IgorAlves Over a year ago

That works. But it outputs %run "C:/Users/Rayn/PYTHON DOCS/6.00.1X/pset0Test.py". Any idea what is this?

jnd · Accepted Answer · 2015-01-16 03:27:16Z

0

You forgot the : on the end of the if. And the next row has to be indented.

answered Jan 16, 2015 at 3:27

jnd

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