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Unable to assign selected values from existing list to an empty list - Printable Version

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Unable to assign selected values from existing list to an empty list - haiderhussain - Jan-18-2017

Hello experts,

Python version : 2.7.10

I am using the below code for assigning the elements : a,b,c,d,e to the list : cities_list.

In order to check my execution, I am using the print statement.

My code :

five_elements = ["a,1","b,2","c,3","d,4","e,5"]
cities_list = []
for i in range(0,len(five_elements)):
    print(five_elements[i][0])
    cities_list.append([i][0])
print(cities_list)
However, I am getting different outputs :
a
b
c
d
e
[0, 1, 2, 3, 4]
I wish to have the output as :
a
b
c
d
e
Could you please help me on this.

Thanks,
Haider

RE: Unable to assign selected values from existing list to an empty list - wavic - Jan-18-2017

Hello!
Every element of the list is a string which is iterable. So you just get the first element of that iterable and append it to the new list.

In [1]: five_elements = ["a,1","b,2","c,3","d,4","e,5"]

In [2]: cities_list = []

In [3]: for i in five_elements:
   ...:     cities_list.append(i[0])
   ...:     

In [4]: cities_list
Out[4]: ['a', 'b', 'c', 'd', 'e']
Your way:

In [5]: for i in range(0,len(five_elements)):
   ...:     cities_list.append(five_elements[i][0])
   ...:         

In [6]: cities_list
Out[6]: ['a', 'b', 'c', 'd', 'e']


RE: Unable to assign selected values from existing list to an empty list - Larz60+ - Jan-18-2017 

cities_list = 'abcde'
    for n in range(len(cities_list)):
        print(cities_list[n])


RE: Unable to assign selected values from existing list to an empty list - snippsat - Jan-18-2017

Hmm what are you doing here Larz60+ Huh
range(len(something)) should never be used.
We have discussed this a lot of times.
The same result:
cities_list = 'abcde'
for n in cities_list:
    print(n)


RE: Unable to assign selected values from existing list to an empty list - Larz60+ - Jan-18-2017

Ok .. Where did I leave my glasses

RE: Unable to assign selected values from existing list to an empty list - haiderhussain - Jan-19-2017

Thanks all...