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Json – TypeError: string indices must be intergers

This is the code that is running in app.py

@app.route("/", subdomain="dev")
def devhome():
    with open("D:/moviewebsite/movielist.json", "r") as f:
        movielist = json.load(f)
    goodmovies = []
    for item in movielist:
        if str(item["link"])[-4:] == ".mp4":
            goodmovies.append(item)
    else:
        return render_template("devHome.html", movielist=goodmovies)

This is a snippet of the movielist.json file for reference:

{
    "12 Years a Slave.mp4": {
        "title": "12 Years a Slave",
        "link": "12 Years a Slave.mp4",
        "count": 1,
        "download": "https://linknotimportant/12 Years a Slave.mp4",
        "torrent": ""
    }
}

This is the error message I get:

File "d:moviewebsiteapp.py", line 70, in devhome
    if str(item["link"])[-4:] == ".mp4":
TypeError: string indices must be integers

I am trying to check if the last 4 bits of the string from an array were what I want them to be for the proper file type.

Tags:

3

Answers


  1. Chosen as BEST ANSWER
    0

    My Answer was opening the dictionary with the item

    @app.route("/", subdomain="dev")
def devhome():
    with open("D:/moviewebsite/movielist.json", "r") as f:
        movielist = json.load(f)
    goodmovies = []
    for item in movielist:
        if str(movielist[item]["link"])[-4:] == ".mp4":
            goodmovies.append(movielist[item])
    else:
        return render_template("devHome.html", movielist=goodmovies)

    just because i was in the loop didnt mean i could use the item as an array when the item in the for loop was just a string,

    So i had to reopen the dictionary with the item


  2. 0

    json.load returns the toplevel object in the JSON file – which in your case is a dict. Iterating over a dict directly gives you strings (the keys of the dict).

    Replace the for loop line with for key, item in movielist.items():. Your code would become:

    @app.route("/", subdomain="dev")
def devhome():
    with open("D:/moviewebsite/movielist.json", "r") as f:
        movielist = json.load(f)
    goodmovies = []
    for key, item in movielist.items():
        if str(item["link"])[-4:] == ".mp4":
            goodmovies.append(item)
    else:
        return render_template("devHome.html", movielist=goodmovies)
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  3. 0

    TL, DR – here’s a fix

    @app.route("/", subdomain="dev")
def devhome():
    with open("D:/moviewebsite/movielist.json", "r") as f:
        movielist = json.load(f)
    goodmovies = []
    for item in movielist.values():
        if str(item["link"])[-4:] == ".mp4":
            goodmovies.append(item)
    else:
        return render_template("devHome.html", movielist=goodmovies)

    Explanation:

    ‘movielist’ is a dictionary. To iterate through it you need to use .keys(), .values() or .items().

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