Remove duplicates python

Question

Can someone help me removing duplicates from reading a file

def listaClientes():
    f = open("chamadas.txt","r").readlines()
    print("Clientes que fizeram chamadas: ")
    new_lines = []
    for line in f:
        parts = line.strip().split()
        chamada = (parts[0])
        print(chamada)

It gives me this (parts)

Clients: 
960373347, 960373347,930930597, 960373347,939999868

As you can see i have numbers repeated, how to prevent this in python?

Thanks

`set(parts)` will return the unique entries in the `parts` `list`. — Seiji Armstrong, Jan 23 '18 at 21:49
if all you want is to remove the duplicates from the list use ; def remove_duplicates(l): return list(set(l)) — Ofir G, Jan 23 '18 at 21:50
Possible duplicate of [Removing duplicates in lists](https://stackoverflow.com/questions/7961363/removing-duplicates-in-lists) — Ofir G, Jan 23 '18 at 21:52

score 0 · Answer 1 · answered Jan 23 '18 at 21:49

You are not doing anything to remove duplicates. use a set to keep only unique values.

Try this:

def listaClientes():
  f = open("chamadas.txt","r").readlines()
  print("Clientes que fizeram chamadas: ")
  new_lines = set()
  for line in f:
    parts = line.strip().split()
    chamada = (parts[0])
    lines = new_lines.add
    return [cli for cli in chamada if not (cli in new_lines or lines(cli))]

score 0 · Answer 2 · answered Jan 23 '18 at 21:51

def listaClientes():
    f = open("chamadas.txt", "r").readlines()
    print("Clientes que fizeram chamadas: ")
    new_lines = []
    for line in f:
        parts = line.strip().split()
        chamada = (parts[0])
        if chamada not in new_lines:#here checking if there any exesting entry
            new_lines.append(chamada)
        print(chamada)
    #at last new_lines have the unique entries

score 0 · Answer 3 · answered Jan 23 '18 at 22:12

0

Well known Python trick:

>>> l = [1, 2, 2, 2, 3, 4, 4, 5]
>>> list(set(l))
[1, 2, 3, 4, 5]

answered Jan 23 '18 at 22:12

Joe Iddon

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Remove duplicates python

3 Answers3