int input

[oursmokeingjoe]

sorry but this is probably a stupid question but;
if you have an input like
pos = 'c3'
#and you want to take out the second character as an int what do you need to add to stop it from producing an error if the second character is a letter
eg. pos = 'cd'
# i've been using
int(pos[1]) # but it gives an error when the [1] is a letter not a number.

[bvdet]

sorry but this is probably a stupid question but;
if you have an input like
pos = 'c3'
#and you want to take out the second character as an int what do you need to add to stop it from producing an error if the second character is a letter
eg. pos = 'cd'
# i've been using
int(pos[1]) # but it gives an error when the [1] is a letter not a number.

Following are a couple of ways.[code=Python]
>>> pos = 'cd'
>>> digits = '0123456789'
>>> if pos[1] in digits:
... print "It's a digit!"
... else:
... print "It's no digit!"
...
It's no digit!
>>> pos = 'c4'
>>> if pos[1] in digits:
... print "It's a digit!"
... else:
... print "It's no digit!"
...
It's a digit!
>>> try:
... col = int(pos[1])
... except:
... col = pos[1]
...
>>> col
4
>>> pos = 'cd'
>>> try:
... col = int(pos[1])
... except:
... col = pos[1]
...
>>> col
'd'
>>> [/code]

[oursmokeingjoe]

# heres the problem how can i manipulate just row = to get the aproiate response
position = 'cd'
col = position[0]
row = int(position[1])
if col in ['a','A','b','B' ,'c','C','d','D ','e','E','f',' F','g','G','h', 'H'] and row in [1,2,3,4,5,6,7,8]:
print 'The piece is moved to %s%s.' % (col,row)
elif col not in ['a','A','b','B' ,'c','C','d','D ','e','E','f',' F','g','G','h', 'H'] and row in [1,2,3,4,5,6,7,8]:
print 'The first coordinate is not in the range a-h or A-H!'
elif col in ['a','A','b','B' ,'c','C','d','D ','e','E','f',' F','g','G','h', 'H'] and row not in [1,2,3,4,5,6,7,8]:
print 'The second coordinate is not in the range 1 to 8!'
else:
print 'The column value and row value is not in the ranges a-h, A-H and 1 to 8!'

[Smygis]

Why not use the built in stuff that whas ment for this...

[code=python]
>>> pos = "cd"
>>> pos[1].isdigit()
False
>>> pos[1].isalpha()
True
>>> pos = "c1"
>>> pos[1].isdigit()
True
>>> pos[1].isalpha()
False
>>>
[/code]