str and int

Question

Hi. Who can help me, i just started learning. I want to display separately positive numbers and if i have a string in list display the message "there is a line in the list"

a = [1,4,78,56, -76, 'qwe']
for item in a:
if item >= 0:
print ('Positive numbers: {}'.format(item))
# elif in a str......

print ('There is a strung in list!')

answer:
Positive numbers: 1
Positive numbers: 4
Positive numbers: 78
Positive numbers: 56
Positive numbers: qwe #I don't want to see it here

There is a string in list! #and it should work

Answer 1

If you do it like that you will get an error something like this when you use Python3

TypeError: '>=' not supported between instances of 'str' and 'int'

so it's better to first print str then print positive (use elif, not if)

Answer 2

if isinstance(item, str): #or "type(item) is str"
print('string')
elif item >= 0:
print('Positive:', item)

Answer 3

Mert Yazıcı thank you, I made my way, with your help

a = [1,4,78,56, -76, 'qwe']
for item in a:
if item >= 0 and type(item) is not str:
print ('Positive numbers: {}'.format(item))
if type(item) is str:
print('There is a string in list!')

Answer 4

a = [1,4,78,56, -76, 'qwe']
for item in a:
if type(item) is str:
print('There is a string in list!')
elif item >= 0 and type(item) is not str:
print ('Positive numbers: {}'.format(item))