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I wonder How I can make certain character always comes first in Python.

For example, I have a list as following.

A = ['a', 'c', 'b', 'x', 'f', 'z'] 

Is there any way that I can make "x" always comes first?

A = ['x', 'a', 'c', 'b', 'f', 'z']

What I have tried:

I have tried IF.

if 'f' in A:
    print('f' + A)

I know this is not a good idea. Would you please let me know how to do it?
Updated 22-Feb-20 23:54pm
Gerry Schmitz 23-Feb-20 0:01am    
join ('f' from A) with (all A except 'f')

1 solution

A = ['x', 'a', 'c', 'b', 'f', 'z']
B = ['f'] + [x for x in A if x != 'f']
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