Python: Removing spaces from list objects [duplicate]

Question

I have a list of objects appended from a mysql database and contain spaces. I wish to remove the spaces such as below, but the code im using doesnt work?

hello = ['999 ',' 666 ']  k = []  for i in hello:     str(i).replace(' ','')     k.append(i)  print k 

Answer 1

Strings in Python are immutable (meaning that their data cannot be modified) so the replace method doesn't modify the string - it returns a new string. You could fix your code as follows:

for i in hello:     j = i.replace(' ','')     k.append(j) 

However a better way to achieve your aim is to use a list comprehension. For example the following code removes leading and trailing spaces from every string in the list using strip:

hello = [x.strip(' ') for x in hello]