On 03/25/2014 02:21 PM, Saad Bashir wrote:
Hi everyone!
I am a novice programmer and actually learning to program in Python. I have
two issues that I am embarrassed to present as they seem to be extremely
basic.
1. But encouraged by the site to ask event the most basic questions on
this forum, here goes:
I am using the book:
Practical Programming: an introduction to computer science using Python 3.
As per its instructions I am using the IDLE environment (Python shell) of
Python [3.2.3 MSC v.1500 64 bit AMD64]. I have been going through the book
without any problems but have become stuck at the following stage:
When using "if" and "elif" statement I get two types of error messages:
1. Practicing the code as given in the book:
>>> ph = float(input('Enter the pH level: '))
Enter the pH level: 8.5
if ph < 7.0:
... print(ph, "is acidic.")
... elif ph > 7.0:
... print(ph, "is basic.")
When I write this in the Python shell, as soon as I hit return after "elif
ph > 7.0:"
I get an error message highlighting "elif" and saying syntax error.
Or if I try the indentation as follows with elif aligned if above I get the
message below:
ph = float(input('Enter the pH level: '))
Enter the pH level: 8.5
if ph < 7.0:
... print(ph, "is acidic.")
... elif ph > 7.0:
... print(ph, "is basic.")
"SyntaxError: : unindent does not match any outer indentation level.
I have tried everything I can think of but to no avail. Please help.
>>> ph = float(input('Enter the ph level: '))
Enter the ph level: 8.5
>>>
>>> if ph < 7.0:
print(ph, 'is acidic.')
elif ph > 7.0:
SyntaxError: unindent does not match any outer indentation level
>>> if ph < 7.0:
print(ph, 'is acidic.')
elif ph > 7.0:
print(ph, 'is basic.')
8.5 is basic.
I am also learning Python and find idle hard to use. My first if/elif
pair looks perfectly aligned but gives a SyntaxError, while my second
if/elif pair looks to be not aligned but works fine.
I imagine there is a better explanation but here is how I think of it.
Python seems to ignore the >>> and considers the i starting if to be in
column 0, so if you put your elif against the left margin it works.
2. Another problem is that the Python shell is allowing me to copy/paste
any code at all. Is there something I am not doing right?
I was able to copy from idle using Ctrl-C and paste to my newreader
using Ctrl-V and then copy from my newsreader back to idle using the
same procedure. I am using Linux and you seem to be using Windows may
be it works differently so I can't help you with it.
Regards, Jim
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