Python

Python RSS

Numeric elements of a mixed list

Thread Solved

•

Join Date: Mar 2007

Posts: 1,522

Reputation: Lardmeister is an unknown quantity at this point

Solved Threads: 22

Lardmeister Lardmeister is offline

Offline

Posting Virtuoso

Numeric elements of a mixed list

Aug 11th, 2007

Right now I have a mixed list of different types of elements:

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
mixed_list = [1, 0.5, 0, 3, 'a', 'z']
 
print max(mixed_list)  # shows z, but would like it to be 3
mixed_list = [1, 0.5, 0, 3, 'a', 'z']

print max(mixed_list)  # shows z, but would like it to be 3

How can I find the maximum numeric element of the list?

•

Join Date: Oct 2004

Posts: 3,862

Reputation: vegaseat is just really nice

Solved Threads: 870

vegaseat

Offline

DaniWeb's Hypocrite

Re: Numeric elements of a mixed list

Aug 11th, 2007

The easiest way is to extablish a temporary list of numeric values ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
mixed_list = [1, 0.5, 0, 3, 'a', 'z']
 
print max(mixed_list)  # shows z, but would like it to be 3
 
number_list = []
for x in mixed_list:
    if type(x) in (int, float):
        number_list.append(x)
 
print number_list
print max(number_list)  # 3
mixed_list = [1, 0.5, 0, 3, 'a', 'z']

print max(mixed_list)  # shows z, but would like it to be 3
 
number_list = []
for x in mixed_list:
    if type(x) in (int, float):
        number_list.append(x)
 
print number_list
print max(number_list)  # 3

You can shorten this with a list comprehension ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
mixed_list = [1, 0.5, 0, 3, 'a', 'z']
 
print max([x for x in mixed_list if type(x) in (int, float)])  # 3
mixed_list = [1, 0.5, 0, 3, 'a', 'z']
 
print max([x for x in mixed_list if type(x) in (int, float)])  # 3