Python – Convert string to list

Question

I am working at a "cloud server" for myself. I have a tool to list files which are on the server.

flist = os.listdir("C:/Server")
conn.send(bytes("str(flist), "UTF-8"))

This sends a list to the client, the client converts it to a string. (something like this: [' Arcer.exe', 'Launcher.exe', 'Document.txt']) Now how can I convert the string back into a list?

string = "[' Arcer.exe', 'Launcher.exe', 'Document.txt']"
list = []
list = string.convert  #pseudo method
print(list[0]) #Arcer.exe
print(list[1]) #Launcher.exe

dangee1705 · Accepted Answer · 2018-10-13 19:39:48Z

2

I would recommend using the json module.

To send the list you can change str(flist) to json.dumps(flist) then on the other end you can reload the list using flist = json.loads(string)

answered Oct 13, 2018 at 19:39

dangee1705

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Vasilis G. · Accepted Answer · 2018-10-13 19:36:00Z

1

You can use literal_eval from ast module:

from ast import literal_eval
string = "[' Arcer.exe', 'Launcher.exe', 'Document.txt']"
newList = literal_eval(string)
print(newList)

Output:

[' Arcer.exe', 'Launcher.exe', 'Document.txt']

If you do not want to use the ast module, another way of doing it is to remove the brackets from your string and then split it in every comma , character as follows:

string = "[' Arcer.exe', 'Launcher.exe', 'Document.txt']"
newList = string[1:-1].replace("'","").split(",")
print(newList)

This will give you the same output as the above:

[' Arcer.exe', ' Launcher.exe', ' Document.txt']

answered Oct 13, 2018 at 19:36

Vasilis G.

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1 Comment

Adam Smith Over a year ago

Note that the last won't work if any of the strings have a comma in them.

jpp · Accepted Answer · 2018-10-13 19:35:03Z

0

First, never name variables list or string. The first is the name of a built-in class, the second is a module in the standard library.

You should avoid using string representations of Python variables, since reading and writing them are not going to be efficient. But, if you have no other option, you can use ast.literal_eval:

from ast import literal_eval

x = "[' Arcer.exe', 'Launcher.exe', 'Document.txt']"
y = literal_eval(x)

print(y, type(y))

[' Arcer.exe', 'Launcher.exe', 'Document.txt'] <class 'list'>

answered Oct 13, 2018 at 19:35

jpp

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