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    <p>A Python version could look this:</p> <pre><code>fobj_in = io.StringIO("""Name1, Surname1 Team1 Team2 Team3 Name2, Surname2 Team2 Team4 Name3, Surname3 Team1 Team5""") fobj_out = io.StringIO() from collections import defaultdict teams = defaultdict(list) for line in fobj_in: items = line.split() if len(items) == 3: name = items[:2] team = items[2] else: team = items[0] teams[team].append(name) for team_name in sorted(teams.keys()): fobj_out.write(team_name + ', ') for name in teams[team_name][:-1]: fobj_out.write('{} {}, '.format(name[0], name[1])) name = teams[team_name][-1] fobj_out.write('{} {}\n'.format(name[0], name[1])) fobj_out.seek(0) print(fobj_out.read()) </code></pre> <p>Output:</p> <pre><code>Team1, Name1, Surname1, Name3, Surname3 Team2, Name1, Surname1, Name2, Surname2 Team3, Name1, Surname1 Team4, Name2, Surname2 Team5, Name3, Surname3 </code></pre> <p>Just do this to read from and write to an actual file:</p> <pre><code>fobj_in = open('in_file.txt') fobj_out = open('out_file.txt', 'w') </code></pre> <h1>EDIT</h1> <p><em>Note</em>: The sample data seem to contain no case that woud result in multiple names on one line in the output.</p> <p>With <a href="https://www.dropbox.com/s/sl3tu7m77gei987/sample.txt" rel="nofollow">this input data</a>, we need to change the code:</p> <pre><code>from collections import defaultdict teams = defaultdict(list) for line in fobj_in: if not line.strip(): continue items = [entry.strip() for entry in line.split('\t') if entry] if len(items) == 2: name = items[0] team = items[1] else: team = items[0] teams[team].append(name) for team_name in sorted(teams.keys()): fobj_out.write(team_name + ', ') for name in teams[team_name][:-1]: fobj_out.write('{}, '.format(name)) name = teams[team_name][-1] fobj_out.write('{}\n'.format(name)) </code></pre> <p>The resulting file content looks like this:</p> <pre><code>"Décore ta vie" (2003), Boilard, Naggy "Mouki" (2010), Boileau, Sonia A chacun sa place (2011), Boinem, Victor Emmanuel Absence (2009) (V), Boillat, Patricia C.A.L.L.E. (2005), Boillat, Patricia Comment devenir un trou de cul et enfin plaire aux femmes (2004), Boire, Roger Couleur de peau: Miel (2012), Boileau, Laurent Hergé:Les aventures de Tintin (2004), Boillot, Olivier Isola, là dove si parla la lingua di Bacco (2011) (co-director), Boillat, Patricia L'île (2011), Boillot, Olivier La beauté fatale et féroce... (1996), Boire, Roger Last Call Indian (2010), Boileau, Sonia Le Temple Oublié (2005), Boillot, Olivier Le pied tendre (1988), Boire, Roger Legit (2006), Boinski, James W. Nubes (2010), Boira, Francisco Questions nationales (2009), Boire, Roger Reconciling Rwanda (2007), Boiko, Patricia Soviet Gymnasts (1955), Boikov, Vladimir The Corporal's Diary (2008) (V) (head director), Boiko, Patricia Un gars ben chanceux (1977), Boire, Roger </code></pre>
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    1. COThank you, but will it handle multiple names, ie double names/surnames, separate team names...(see comments above)
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    2. COIt will handle the sample input. How do I know how your real input looks like? Are the compound names also separated by spaces, by commas, by something else? How many parts can a name, a surname or a team have? The code needs to be adapted to this.
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    3. COYeah, I know, I'm sorry. I edited my question posting a link to a sample of my database to clarify things (https://www.dropbox.com/s/sl3tu7m77gei987/sample.txt). Well, actually there might be multiple names as well as surnames. Also, the team field is quite long, since it can add other kind of information (when available) and quotes once in a while. Ideally I should search my keyword in the "team" string (which contains as said, also other info), and the code should return the name of the people associated to it.
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